JPH0779034B2 - Heating device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a heating device for cooking an object to be heated.

2. Description of the Related Art Conventionally, as a cooling structure of a heating device, for example, a high-frequency heating device, cooling air is sucked from a suction port by a propeller fan and a fan motor to cool power supply components such as a high-voltage transformer, a high-voltage condenser, and a magnetron, and after cooling. A part of the air is introduced into the heating chamber and is vented to the outside of the main body after ventilating the inside of the heating chamber, and the other is exhausted from the equipment room to the outside of the main body through exhaust ports provided around the main body. Used.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the case of a heating device such as a high-frequency heating device that is fixedly used on a wall surface, it is used by being incorporated in a wall surface or a system kitchen, or installed above a stove. In the case of a heating device such as a high-frequency heating device, the intake port and exhaust port are limited to the front of the main body and its surroundings, so if the intake port and exhaust port are installed adjacent to each other, the exhaust gas discharged from the exhaust port Is partially sucked as cooling air again and the temperature of the cooling air rises, which causes a reduction in the cooling effect. In order to prevent this, the intake port and the exhaust port are often installed far apart. In this case, since the distance from intake air to exhaust air becomes longer, the pressure loss during that time increases, the cooling air volume decreases, and the cooling effect decreases.To improve this, the ventilation capacity of the propeller fan and fan motor is reduced. Need to improve. Further, since separate air guides are required for intake and exhaust, the number of parts increases and the structure becomes multiple.

The present invention is to solve such conventional problems,
(EN) A heating device having an excellent cooling effect and a simple structure because an intake port and an exhaust port are adjacent to each other with a simple structure and a part of exhaust gas can be prevented from being sucked as cooling air from the intake port. .

Means for Solving the Problems In order to achieve the above-mentioned object, a heating device of the present invention is a heating chamber for accommodating an object to be heated in a main body, and heating for heating an object to be heated installed in the heating chamber next to the heating chamber. Means and a cooling fan provided behind the heating means for cooling the heating means by generating an air flow from the rear to the front, and an intake port for sucking the cooling air introduced by the cooling fan and an exhaust after cooling. An exhaust outlet is provided above the front of the equipment room that houses the heating means and cooling fan, and the intake duct from the inlet through which the cooling air introduced by the cooling fan passes to the vicinity of the cooling fan and the exhaust after cooling passes. The exhaust duct from the equipment room to the exhaust port is integrally configured with a boundary wall separating the two, and the boundary wall has the width of the adjacent intake duct at least near the exhaust port from the intake port to the inside of the intake duct. The air guide is installed at a certain angle in a direction that narrows as it goes to the section.

Effect With the heating device of the present invention, the cooling air introduced from the intake port to the rear of the equipment chamber by the cooling fan through the intake duct of the air guide cools the heating means and flows to the front of the equipment chamber. However, at this time, since the cooling air is heated by heat exchange with the heating means that has generated heat, an upward velocity component is generated due to buoyancy. The effect of this buoyancy and the collision of the air flow with the wall surface in the front of the equipment room changes the flow of the cooling air upwards, and from the top of the equipment room through the exhaust duct that is integrated with the air intake duct of the air guide to the front surface of the main body. It is discharged from the upper exhaust port to the outside of the aircraft. Here, since the intake port and the exhaust port are installed adjacent to each other, the air guide can be configured by integrating the intake duct and the exhaust duct, which is simpler than the case where the exhaust duct and the intake duct are separately configured. Can be configured. Further, although the exhaust port and the intake port are adjacent to each other, at least the vicinity of the exhaust port of the boundary wall separating the exhaust duct and the intake duct has a constant width in a direction in which the width of the intake duct becomes narrower as it goes from the intake port to the inside of the intake duct. Since it is installed at an angle, the exhaust gas is discharged with a velocity component in the opposite direction to the intake port adjacent to the exhaust port, so part of the exhaust gas exhausted from the exhaust port is again cooled from the intake port. It has a more efficient cooling structure that can prevent the temperature of sucked cooling air from rising and the cooling effect from decreasing.

Example Hereinafter, an example of a high-frequency heating device according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows an air guide 1 for realizing the cooling structure of the present invention in this embodiment. This air guide 1 has two openings, an intake port 2 and an exhaust port 3, on the front surface.
The inside of the is completely separated by a wall 4 and has two ducts each having another opening 5 and 6, so that this part alone can serve as an air guide for intake and exhaust. It is possible. Further, the boundary wall 4 separating the exhaust duct and the intake duct is configured such that a portion near the exhaust port 3 is formed with a certain angle in a direction in which the width of the intake duct is narrowed as it goes from the intake port 2 to the inside of the intake duct. Therefore, the exhaust gas passing through the exhaust duct has a velocity component in the direction opposite to the intake port 2 when viewed from the exhaust port 3 by the boundary wall 4, and is exhausted from the exhaust port 3 while maintaining this velocity component. Further, this air guide is composed of a bottom plate which constitutes a wall surface including the two openings 5 and 6, and a guide portion which constitutes the other part, and the latter guide portion is constituted by resin molding, so that the duct structure is formed. Also, the position of the boundary wall 4 can be easily configured freely, and even when a complicated configuration is required, it can be realized by a simple configuration with only these two parts.

As described above, in the portion where the boundary wall 4 between the exhaust duct and the intake duct is close to the exhaust port 3, as described above, the width of the intake duct is narrowed toward the inside of the intake duct from the intake port 2 by a certain angle. If the width of the entire air guide 1 is constant, the width of the exhaust duct becomes narrower as it approaches the exhaust port, which may lead to deterioration of exhaust efficiency due to an increase in pressure loss. In the air guide 1 of the embodiment, the opposing wall of the boundary wall 4 of the exhaust duct is configured to be parallel to the boundary wall 4 to prevent the exhaust duct from being narrowed and exhaust efficiency being deteriorated.

FIG. 2 is a sectional view of the cooling structure of this embodiment. In the figure, 1 is the above air guide, and the cooling air flows from the intake port 2 to the equipment chamber 12
A high voltage transformer 10 is provided by a cooling fan 8 provided at the rear of the rear side of the rear of the equipment chamber, which is introduced into the rear of the equipment room 12 through an intake duct portion 13 of an air guide.
After cooling the power supply components such as the high-voltage condenser 9 and the magnetron 11, the direction is changed to the upper direction, and the exhaust port 3 at the upper front of the equipment room 12
Through the exhaust duct portion 14 of the air guide 1 and is immediately discharged to the outside of the main body. At this time, the upward direction change of the cooling air occurs because buoyancy is generated due to the temperature rise due to heat exchange, and the collision with the wall 15 in the front of the equipment chamber 12 also causes an upward velocity component force, which allows smooth movement. Further, the exhaust gas is discharged from the exhaust port 13 while maintaining the upward velocity component, and further, the exhaust gas passing through the exhaust duct by the boundary wall 4 of the air guide 1 is opposite to the intake port 2 when viewed from the exhaust port 3. Since a part of the exhaust gas is prevented from being sucked as the cooling air from the intake port 2 by being discharged with the velocity component in the direction, the temperature rise of the cooling air can be prevented and more effective cooling can be realized. it can.

It should be noted that by providing a slight gap between the intake port 2 and the exhaust port 3 by the wall 7 as shown in FIG. 1, a part of the exhaust gas is more reliably sucked from the intake port 2 as cooling air. As a result, the cooling effect can be further improved.

Effects of the Invention As described above, according to the heating device of the present invention, the following effects can be obtained.

(1) An intake port and an exhaust port are installed adjacent to each other above the front surface of the main body, and the buoyancy of the cooling air heated by exchanging heat with the heating means of the equipment chamber and the upper surface generated by colliding with the front wall of the equipment chamber. The exhaust is discharged upward by utilizing the velocity component force to
Furthermore, the exhaust gas can be seen from the exhaust port by forming a portion of the boundary wall of the air guide near the exhaust port with a certain angle in the direction in which the width of the intake duct narrows as it goes from the intake port to the inside of the intake duct. Cooling air circulates smoothly due to the structure that discharges with velocity component in the direction opposite to the intake port, and it is possible to prevent a portion of hot exhaust gas from being sucked as cooling air from the intake port. This makes it possible to more effectively cool the power supply components of the heating device.

(2) Since it is possible to install the intake port and the exhaust port adjacent to each other, it is possible to integrate the air guides for intake and exhaust, which simplifies the cooling structure and reduces the number of parts. .

[Brief description of drawings]

FIG. 1 is a perspective view showing an air guide of a heating device in an embodiment of the present invention, and FIG. 2 is a perspective view of a main part of the device. 1 ... Air guide, 2 ... Intake port, 3 ... Exhaust port, 12 ...
… Equipment room, 13 …… Intake duct, 14 …… Exhaust duct.

Claims (1)

[Claims] 1. A heating chamber for accommodating an object to be heated in a main body, a heating unit installed beside the heating chamber for heating an object to be heated in the heating chamber, and a heating unit provided behind the heating unit. A cooling fan for generating an air flow from the rear side to the front side to cool the means, and an intake port for sucking the cooling air introduced by the cooling fan and an exhaust port for discharging the exhaust air after cooling, the heating means and the Provided above the front of the equipment room that houses the cooling fan, and from the equipment room through which the intake duct from the intake port through which the cooling air introduced by the cooling fan passes to the vicinity of the cooling fan and the exhaust air after cooling passes The exhaust duct up to the exhaust port is integrally formed via a boundary wall separating the two, and the boundary wall draws the width of the adjacent intake duct at least near the exhaust port from the intake port. Heating apparatus configured to include an air guide is installed to provide a constant angle in the narrow direction with the progress to the inside transfected.