JPH04354510A - Oven hood fan - Google Patents

Abstract

PURPOSE:To facilitate an alarm operation with a high accuracy concerning a requirement for filter cleaning. CONSTITUTION:An exhaust blower is incorporated in the hood in which an oily smoke from an oven is collected; a filter by which oil drops, etc., contained in the oily smoke are collected before the smoke is sucked into the exhaust blower is provided in the hood; also, simultaneously, the cumulative hours of use of the main heater in the oven corresponding to the oven hood fan in the oven 1 is counted by means of a signal from a detector 5 provided on the side of the oven 1; and a filter maintenance alarm device 6, by which an alarm is activated as the reminder of a filter cleaning when the cumulative hours of use reaches a prescribed value, is provided. Consequently, the alarm action as the reminder of the filter cleaning based on the cumulative hours of use of the heater, which is the cause of the soil of the filter, is made possible, and the alarm action with a high accuracy matched with the actual extent of the soil of the filter is facilitated.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a range hood fan that collects and exhausts oily smoke and the like that accompanies the use of a range.

0002

2. Description of the Related Art As is well known, conventional range hood fans have a structure in which an exhaust blower is incorporated into a hood that collects oil smoke and the like rising from the range. There are various types of hoods, but all of them have a structure that guides the oil smoke rising from below to an internal blower without dispersing it. A filter that collects oil droplets and the like is removably attached. Filters are easily clogged due to oil stains, etc.
Some devices are designed to request cleaning of the filter by turning on a lamp or the like when the operating time of the range hood fan reaches a predetermined value.

The range hood fan configured as described above performs a notification operation to request the user to clean the filter when a predetermined operating time is reached, assuming that the degree of dirt on the filter is proportional to the operating time of the range hood fan. This prevents the filter from being used while it is clogged with oil stains.

0004

[Problem to be Solved by the Invention] In the above-mentioned range hood fan, the notification operation for the filter cleaning request is determined regardless of the usage condition of the range which causes the filter to become dirty. The notification of a cleaning request does not necessarily correspond to the degree of dirt on the filter, and has a low degree of accuracy that can only be used as a rough guide.

SUMMARY OF THE INVENTION An object of the present invention is to provide a range hood fan with high accuracy of notification operation for requesting filter cleaning.

[0006]

[Means for Solving the Problems] A range hood fan according to the present invention includes a filter maintenance notification device that performs a notification operation to request filter purification when the cumulative usage time of the main stove of the corresponding range reaches a predetermined value. It is something that

[0007]

[Function] The range hood fan of the present invention performs a notification operation to request cleaning of the filter based on the cumulative usage time of the stove, which causes the filter to become dirty.
The notification operation is more appropriate to the actual condition of the filter's dirtiness.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a configuration diagram of an electric system of a range hood fan showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the installed state of the range hood fan. The range hood fan of this embodiment has the same functional components as the conventional ventilation system. That is, although some parts are omitted in the drawings, an exhaust blower is incorporated into the hood 2 that collects oil smoke and the like rising from the range 1. Microwave 1 of hood 2
A filter 3 for collecting oil droplets contained in passing oil smoke and the like is removably attached to the suction opening facing upward. The filter 3 is notified of a cleaning request by a filter maintenance notification device. The filter maintenance notification device includes a microcomputer 4 and a detector 5 as shown in FIG.
and an alarm 6. Detector 5 is applicable range 1
While the main stove 7 and sub-stove 8 are in use, signals continue to be output to the microcomputer 4. In the illustrated example, it is shown as a use detection switch that is linked to the respective ignition switches of the main stove 7 and the auxiliary stove 8.

[0009] The microcomputer 4 in the range hood fan configured as described above counts the time during which the output from the detector 5 is present, and calculates and stores the cumulative time. Then, when the cumulative time reaches a predetermined value, an operation signal for operating the alarm 6 is output. This operating signal continues to be output until the filter 3 is removed for cleaning or a reset operation is performed. When it is reset as described above, the memory of the cumulative time is also erased, the usage time of the range 1 is newly counted from 0, the cumulative time is stored, and the above operation is repeated. In other words, the cleaning request for filter 3 is
Since this is carried out based on the accumulated usage time of the microwave oven 1 that causes contamination, there is little discrepancy between the actual degree of contamination of the filter 3 and the notification operation, making it possible to request maintenance of the filter 3 with high accuracy.

[0010] A microwave oven usually has two to three stoves, and they are used depending on the purpose of cooking, but the main cause of dirt on the filter 3 is cooking that uses oil. Since the main stove 7 with strong firepower is used, simply equipping the main stove 7 with the detector 5 makes it possible to notify the maintenance request of the filter 3 with sufficient accuracy.

[0011]

Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, a notification operation for requesting cleaning of the filter is performed based on the accumulated usage time of the stove, which causes the filter to become dirty. It is possible to perform a highly accurate notification operation that matches the actual state of the dirt.

0012

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an electrical system of a range hood fan showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an installed state of a range hood fan according to the present invention.

[Explanation of symbols]

1 Range 2. Food 3 Filter 4 Microcomputer 5 Detector 6　Alarm 7 Main stove

Claims (1)

[Claims] 1. A microwave oven, wherein an exhaust blower is built into a hood that collects oil smoke rising from the range, and the hood is equipped with a filter that collects oil droplets contained in the oil smoke before it is sucked into the exhaust blower. In the hood fan, the cumulative usage time of the main stove of the corresponding range is counted by a signal from a detector installed on the range side, and when this cumulative usage time reaches a predetermined value, an alarm operation is performed to request purification of the filter. A range hood fan characterized by being equipped with a filter maintenance notification device.