JPS58213140A - Ventilating apparatus - Google Patents

Abstract

PURPOSE:To allow the ventilation to be performed positively in response to the operation of a burning apparatus, by detecting the light of a flame of the burning apparatus or the like through a light transmitting body that comprises optical fibers by a photoelectric switch. CONSTITUTION:A ventilating fan 1 includes a hood 2 that is positioned over a range 4, is attached to a room wall 3, contains a blowing chamber 5 and an electric part housing chamber 6, and has a suction port 7 in the lower surface and an exhaust port 8 in the back surface. A blower 9 is accomodated in the blowing chamber 3, and the photoelectric switch 12 is housed in said housing chamber 6. The base part of the light transmitting body 13 is connected with the photoelectric switch 12 and the tip thereof extends into a side of the range 4. Thus after the change-over switch 17 has been changed over on the side of the photoelectric switch 12, and when the range 4 is operated, the light of the flame is transmitted through the light transmitting body 13 to the photoelectric switch 12 so that the switch 12 is turned on to drive the blower 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a ventilation system that is automatically operated by detecting the use of a combustion appliance such as a range.

[Technical background of the invention and point J]

Conventionally, ventilation systems that automatically operate when the microwave is in use have been designed to use a senna to detect smoke and unglazed gas from the microwave and drive the ventilation fan based on this information. However, with this method, there is a risk that the detection by the sensor may be uncertain when the concentration of smoke or combustion gas is low, and the sensor installation position, that is, the detection position, may be There was also the trouble of having to select one suitable for detection.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and its purpose is to be able to reliably detect the use of a combustion appliance, such as a range, in a device that automatically operates by detecting the use of a combustion appliance such as a range. The object of the present invention is to provide a ventilation system whose detection position can be easily set.

[Summary of the invention]

The present invention is characterized in that light from a combustion appliance, such as a flame, is detected by a photoelectric switch via a light guide made of an optical fiber, and a blower of a ventilation fan is driven based on this detection.

[Embodiments of the invention]

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

First, in the figure, 1 is a ventilation fan for the range, which is arranged as follows. That is, 2 is a hood, and this is attached to the chamber wall 3 so as to be located above the combustion chamber 4, which is the combustion chamber. It is cut and formed. A suction lower is formed on the lower surface of this boudoir 2, and an exhaust port 8 is formed on the back surface, and this exhaust port 8 is inserted into the ventilation port 3a of the room wall 5 and faces the outdoors. .

Note that this exhaust port 8 is provided with a shutter 8a.

Reference numeral 9 denotes a blower installed in the blower chamber 3, which, as is well known, is composed of a blower blade 10 and a drive motor 11. On the other hand, 12 is a photoelectric switch, which connects the electrical equipment. The photoelectric switch 12 has a light receiving element (such as a phototransistor) inside.
(not shown), which turns on when it receives light. Reference numeral 15 denotes a light guide, which is composed of a first light guide part 14 made of plastic fiber and a second light guide part 15 made of heat-resistant glass fiber. The section 14 and the second light guide section 15 are connected by a repeater 16 and connected in a single tree. As shown in FIG. 2, this intermediate shaft 16 has screw seats 16a, 16a. The base end (first light guide section 14 side) of one such light guide 13 is connected to the photoelectric switch 12, and the middle part is led out from the ventilation fan 1 and hangs down along the taro 3. The tip part (second light guide part 15 side) is arranged so as to face the microwave oven 4 from the side, and the middle part of the light guide part 16: well, the repeater 16 is placed in the room. It is fixed to the chamber wall 3 by screwing it to the wall 3. 17':'L Electric' - This is a changeover switch arranged in the two-item storage chamber 6, which switches the WED motor from the L off position, which can be seen from the electric circuit shown in FIG. 6, via the photoelectric switch 12. 11 and a current path to the motor 11 that does not go through the photoelectric switch 12 are selectively closed.

Now, the operation of the above configuration will be explained. First, the changeover switch 17 is set to the photoelectric switch 12 side. When the range 4 is used, the light from the flame in the range 4 is transmitted to the photoelectric switch 12 via the light guide 15, and the photoelectric switch 12 receives the light and turns on. 1) The motor 11 is energized and the blower 9 is driven. Then, due to the blowing action of the blower 9, the range 4
Oil smoke, etc. rising from this area is discharged outside. When the use of the microwave oven 4 is finished, no more light is transmitted to the photoelectric switch 12, so the photoelectric switch 12 is turned off and the blower 9 is turned off.

As described above, according to this embodiment, the following effects can be obtained. That is, the light from the flame in the range 4 is detected by the photoelectric switch 12 via the light guide 13 made of an optical fiber, and in other words, the use of the range 4 is detected by detecting the light, so that smoke and combustion air can be detected. Unlike the conventional detection method, it is possible to reliably detect the use of the range 4, which is a combustion sensor, and when installing the light guide 15, which is a sensor, it can be installed with its tip facing the range 4. It is possible to perform reliable detection, and therefore, unlike the conventional method, the detection position can be easily selected. In addition, since the middle part of the light guide 13 can be continued by the repeater 16, even if the light guide 13 is cut in the middle to adjust the length, the light guide 13 can be connected to one tree. Therefore, the length of the light guide 13 can be adjusted. Moreover, since the repeater 16 is also used as a fixture, a separate member for attaching and fixing the light guide 13 to the chamber wall 3 is not required. It is also possible to reduce the number of parts without having to do so. In addition, the ventilation fan 1 side of the light guide 13, that is, the first light guide section 14, is made of an inexpensive plastic fiber, and the tip side, that is, the second light guide section 15 is made of a heat-resistant glass fiber. Therefore, the material cost can be reduced while preventing the light guide 13 from being deformed by the heat of the flame.

In the above embodiment, a 91 cM oven fan was used as the ventilation fan.
For the sake of example, the light from the flame of the microwave oven is detected, but when using a general-purpose ventilation fan, the light from the flame of combustion equipment such as an oil sweeper is detected. Alternatively, if it is difficult to directly detect the light of the flame of the combustion equipment, it is also possible to detect the light of a pilot lamp for indicating combustion emitted by the combustion equipment. be.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and can be implemented with various modifications within the scope of the invention.

〔Effect of the invention〕

As explained above, the present invention detects light such as the flame of a combustion device using a light guide made of an optical fiber and a photoelectric switch, and drives a blower based on this, so that it can be used easily in a combustion device. Ventilation operation can be carried out in a reliable response, and the detection position can be selected quite easily.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view of the ventilation fan section in an installed state, with a vertical section shown, Fig. 2 is an enlarged front view of the repeater section, and Fig. 3 is an electric circuit configuration diagram. . In the figure, 1 is a ventilation fan, 4 is a range (combustion condenser), 9 is a blower, 12 is a photoelectric switch, 13 is a light guide, 14 is a first light guide, 15 is a second light guide, and 16 is a It is a repeater. Applicant Tokyo Shibaura Electric Co., Ltd. Agent Patent Attorney Sa M Tsuyoshi No. 10 Figure 2

Claims (1)

[Scope of Claims] 1. A ventilation fan installed on a room wall and having an air blower; a photoelectric switch installed on the ventilation fan and turned on by receiving light to energize the air blower; A ventilation system comprising a light guide made of an optical fiber positioned so as to be able to receive light from flames, etc. of combustion equipment. , 2. 2. The ventilation device according to claim 1, wherein the light guide is vertically connected by a repeater in the middle. 3. The ventilation device according to claim 1, wherein the light guide is made of heat-resistant glass fiber at least on the tip side, and made of plastic fiber on the ventilation fan side.