Electric heating – Microwave heating – Enclosed cavity structure
Reexamination Certificate
2000-06-16
2001-06-05
Leung, Philip H. (Department: 3742)
Electric heating
Microwave heating
Enclosed cavity structure
C219S681000, C219S400000, C219S702000, C126S02100R, C126S29900R
Reexamination Certificate
active
06242725
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a heat cooking device and, more specifically, to a heat cooking device including a fan for feeding air from an inlet to an outlet through an air path.
2. Description of the Background Art
A conventional heat cooking device is provided with a fan for cooling a high voltage transformer or a magnetron as heating means. Among heat cooking devices, for a microwave oven installed at a high place, for example on a wall or on a kitchen cabinet, a fan has been provided not only for cooling but also for allowing use of the device simply as a ventilation fan.
In some of the conventional heat cooking devices, some allow selection of direction of exhaustion of the fan from a plurality of directions. For example, a device of the type installed on a kitchen cabinet, allows the user to select the direction of exhaustion into or out from the room.
In such type of heat cooking device, however, when the direction of exhaustion of the fan is set into the room, the noise at the time of exhaustion or ventilation has been rather large and unpleasant for the user.
SUMMARY OF THE INVENTION
The present invention was made in view of the foregoing, and its object is to provide a heat cooking device which can avoid such unpleasantness of the user.
The heat cooking device in accordance with the present invention includes heating means, an inlet, an outlet, and a fan feeding air from the inlet through an air path to the outlet, additionally including driving means for driving the fan, the fan is installed in any of a plurality of different manners of installation feeding air in different directions, the driving means controls the fan such that the fan rotates at a certain number of rotation within a prescribed range, and the prescribed range of the number of rotation is determined dependent on the manner of installation of the fan.
In the heat cooking device of the present invention, the range of the number of rotation of the fan is determined dependent on the manner of installation of the fan. Therefore, it becomes possible to lower the number of rotation of the fan only when the direction of exhaustion of the fan may cause noise unpleasant for the user, at the time of exhaustion.
Preferably, the different manners of installation include a first manner of installation in which the fan feeds air to the room, and a second manner of installation in which the fan feeds air to the outside, and the driving means determines the prescribed range for the first manner of installation to be smaller in the number of rotation, than the prescribed range for the second manner of installation.
Accordingly, when the fan exhausts air to the room, the number of rotation of the fan is made lower than when the air is exhausted to the outside, possibly lowering noise at the time of exhaustion.
Preferably, the manner of installation of the fan is changeable, and the device further includes input means capable of receiving as an input information of the manner of installation after the change. The driving means determines the prescribed range of the number of rotation based on the information of the manner of installation after the change input through the input means.
Accordingly, it is possible for the user to change the manner of installation of the fan, and the fan rotates at an appropriate number of rotation, in accordance with the manner of installation after the change.
Preferably, there are a plurality of outlets, the fan includes a cover capable of feeding air to any of the plurality of outlets and opening/closing a prescribed outlet among the plurality of outlets, and cover opening/closing means capable of controlling opening/closing of the cover, the cover opening/closing means keeps the cover in the closed state and opens/closes the cover in accordance with the operation of the fan only when the fan is installed in such a manner of installation in that the air is fed to the prescribed outlet.
Accordingly, when it is unnecessary to open the prescribed opening, the opening is closed by the cover. Therefore, entrance of dust or the like to the heat cooking device can surely be avoided.
Preferably, the device further includes an oil filter and a charcoal air filter provided at the inlet.
Namely, a plurality of filters are provided adjacent to each other. Therefore, maintenance including exchange of the plurality of filters is facilitated.
REFERENCES:
patent: 4115678 (1978-09-01), Tachikawa et al.
patent: 4143646 (1979-03-01), Sampsel
patent: 4886046 (1989-12-01), Welch
patent: 6093922 (2000-07-01), Kim
patent: 6097000 (2000-08-01), Frasnetti et al.
Fukuda Takashi
Fukuda Yoshihito
Murata Junji
Armstrong Westerman Hattori McLeland & Naughton LLP
Leung Philip H.
Sanyo Electric Company Ltd.
LandOfFree
Heat cooking device allowing control of fan rotation number does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Heat cooking device allowing control of fan rotation number, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heat cooking device allowing control of fan rotation number will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2512617