JPH0519060B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a ventilation system having a rotatable and removable hood front plate pivoted to a front opening of a hood body.

[Technical background of the invention]

Conventionally, in a ventilation device called a range hood fan, a blower, such as a ventilation fan, is installed in a hood body with openings on the front and bottom surfaces, and a hood front plate is rotated to open and close the fan through the front opening of the hood body. A so-called push-off type switch is provided in the vicinity of the front opening of the hood main body so as to be movable and detachable, and is further provided with a so-called push-off type switch that turns off when an operator is pressed and cuts off the energization path of the motor of the ventilation fan. hand,
When the hood front plate is closed, the hood front plate presses the switch operator to turn off the switch, thereby cutting off the energizing path of the motor, and when the hood front plate is opened, the hood front plate operates the switch. A structure is provided in which a motor conduction path is formed by releasing the pressure on the child and turning on the switch.

[Problems with background technology]

However, in the conventional configuration, when the hood front plate is removed from the front opening in order to clean the inside of the hood body, the pressure on the switch operator by the hood front plate is released, so the switch is turned on and the ventilation fan motor is turned on. This is extremely dangerous as it creates a current-carrying path, and for this reason, it is necessary to pull out the plug of the power cord line from the power outlet before cleaning, resulting in poor cleaning efficiency.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to automatically cut off the energizing path of the blower motor when the hood front plate is removed from the front opening of the hood body, and to The objective is to provide a ventilation system that is easy to clean.

[Summary of the invention]

The present invention provides a hood main body equipped with a blower, a rotatable and detachable hood front plate, and a first switch that turns on and off in conjunction with opening and closing of the hood front plate, wherein the hood main body A second switch is provided, which is turned on when the hood front plate is attached and turned off when the hood front plate is removed, and interrupts the energization path of the motor of the blower in response to the second switch being turned off. The feature is that when the plate is removed from the hood body, the energizing path of the blower motor is automatically cut off.

[Embodiments of the invention]

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

First, in FIG. 1, reference numeral 1 denotes a hood body having a substantially rectangular box shape, the lower surface of which is open, and the front surface of the hood body that is open except for the upper front plate 1a. Reference numeral 2 denotes a ventilation fan, which is an air blower, attached to the upper part of the back plate 1b of the hood main body 1 so as to protrude rearward, and this is composed of an outer frame 3, a motor 4, a fan 5, and the like. Reference numeral 6 denotes a support member that is inserted between the front plate 1a and a guide part 7 located on the back side of the front plate 1a, and is provided so as to be able to move up and down at the same time. A semi-circular support portion 8 protruding through a slit 1c of the face plate 1a is bent and formed, and an operating portion 9 directed rearward is formed in a bend at the upper end. A tension coil spring 10 is stretched between the intermediate portion of the operating portion 9 of the support member 6 and the top plate 1d of the hood body 1.
The support member 6 is always urged upward by the spring force of the tension coil spring 10. Reference numeral 11 denotes a rectangular hood front plate, and side plate portions 11a, 11a (only one shown) are provided at both left and right ends facing rearward.
It has an upper plate part 11b facing rearward at the upper end part, and this upper plate part 11b
A semi-circular support piece 12 is fixed to the back surface of the hood, and one end of an operating piece 13 oriented rearward and obliquely upward is fixed to the upper back surface of the hood front plate 11. The hood front plate 11 is located in front of the front opening of the hood body 1 and has a support piece 12.
By hooking on the support part 8 of the support member 6,
It is rotatably and detachably pivoted to the support member 6. Here, when the hood front plate 11 is attached to the support member 6, the support member 6 is displaced downward by the weight of the hood front plate 11 against the biasing force of the tension coil spring 10. become. Reference numeral 14 designates a well-known locking mechanism having a locking lever 15 that is movable in the front and rear direction. It is removably attached to the lower inner surface with attachment screws 16, and is adapted to lock the hood front plate 11 in the open position. On the other hand, a cover 17 is attached to the upper part of the hood main body 1, spanning the front plate 1a and the top plate 1d. Reference numeral 18 denotes a first switch located inside this cover 17 and attached to the lower inner surface of the front plate 1a.This is a push-off type switch that turns off when the operator 19 is pressed. It protrudes forward through the face plate 1a and faces the operation piece 13 of the hood front plate 11 in close proximity. In this case, the first switch 18
The operation element 19 is moved to the operation piece 13 only when the front opening of the hood body 1 is closed by the hood front plate 11 attached to the hood body 1.
It is configured to be turned off by being pressed by. Reference numeral 20 designates a second switch mounted on a switch mounting plate 20a which is also located within the cover 17 and installed between the cover 17 and the guide portion 7, and is turned on when the operator 21 is pressed. It is of a push-on type, and its operator 21 projects upward and faces the operating section 9 of the support member 6. In this case, the second switch 20
The operator 21 is such that the hood front plate 11 is connected to the hood main body 1.
When the support member 6 is attached to the hood and is displaced downward, it is pressed by the operation section 9 of the support member 6, and the hood front plate 11 is removed from the hood body 1 and the support member 6 is moved to the tension coil. It is configured such that the pressure applied by the operating section 9 is released when the operating section 9 is displaced upward by the spring force of the spring 10. Therefore, the second switch 20 is turned on when the hood front plate 11 is attached and turned off when the hood front plate 11 is removed. These first and second switches 18 and 20 are connected to the plug 2.
2a with power cord wire 22 and lead wire 23
The motor 4 of the ventilation fan 2 is connected in series with the energizing path formed by the motor 4 of the ventilation fan 2.

Next, the operation of the above configuration will be explained. First, in the state shown in FIGS. 1 and 2 in which the hood front plate 11 is attached to the hood main body 1 and the front opening of the hood main body 1 is open, the first switch 18 is operated so that the operator 19 is not connected to the operating member 13. At the same time, the second switch 20 is also in the on state because the operating element 21 is pressed by the operating part 9 of the support member 6, and therefore a current conducting path for the motor 4 of the ventilation fan 2 is formed. As a result, the fan 5 is rotated to suck indoor air into the hood body 1 from the lower opening, and the sucked air is discharged outdoors through the outer frame 3 of the ventilation fan 2. will be carried out. Next, the locking mechanism 14 is released from the locked state, and the front opening of the hood main body 1 is closed by rotating the hood front plate 11 about the support piece 12 in the direction of arrow A in FIG. As shown in the figure, the operating piece 13 of the hood front plate 11 presses the operating element 19 of the first switch 18 to turn off the first switch 18, thereby cutting off the energizing path of the motor 4 of the ventilation fan 2. Ventilation operation is stopped.

On the other hand, when removing the hood front plate 11 from the hood body 1 in order to clean the inside of the hood body 1, the lock lever 15 of the lock mechanism 14 is separated by removing the mounting screws 16 from the side plate portion 11a of the hood front plate 11. , then hood front plate 1
This is done by lifting the support piece 1 upward and separating the support piece 12 from the support part 8 of the support member 6. In this way, when removing the hood front plate 11 from the hood body 1,
The operation piece 13 of the hood front plate 11 is the first switch 1
By being separated from the operator 19 of 8, the first
The switch 18 is turned on, but when the hood front plate 11 is removed from the support member 6, the pressure on the operator 21 of the second switch 20 by the operation part 9 of the support member 6 is released as described above. The second switch 20 is automatically turned off, thereby cutting off the energizing path of the motor 4 of the ventilation fan 2. Therefore, when the hood front plate 11 is removed from the hood body 1, the power supply path for the motor 4 of the ventilation fan 2 is automatically cut off. There is no need to pull out the plug 22a of the wire 22 from a power outlet (not shown), which improves cleaning work efficiency.

In particular, in this embodiment, the cover 17 is attached to the hood body 1.
Since the cover 17 covers the first and second switches 18 and 20,
The cover 17 prevents both switches 18 and 20 from being contaminated by oil smoke or the like that is sucked into the hood main body 1 during ventilation operation, and one cover 17 covers both switches 18 and 20. So the configuration is easy.

In this embodiment, the second switch 20 is a push-on type switch, but a push-off type switch may be used instead.
For example, the switch can be connected to the top plate 1d of the hood body 1.
The operator may be attached to the support member 6 with the operator facing downward, so that the operator faces above the operating portion 9 of the support member 6.

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

〔Effect of the invention〕

As is clear from the above description, the present invention includes a hood main body equipped with a blower, a rotatable and detachable hood front plate, and a first switch that is turned on and off in conjunction with opening and closing of the hood front plate. In the ventilation system, the hood main body includes a second switch which is turned on when the hood front plate is attached, is turned off when the hood front plate is removed, and interrupts the energization path of the motor of the blower in response to the turn-off. With this switch, when the front plate of the hood is removed from the hood body, the power path of the blower motor can be automatically cut off, making it possible to disconnect the power cord wire plug when cleaning. This has an excellent practical effect in that it does not need to be unplugged from the power outlet, making cleaning easier.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, FIG. 1 is a longitudinal sectional view, FIG. 2 is an electric circuit diagram showing main parts, and FIGS. 3 and 4 are equivalent to FIG. 2 for explaining the operation. It is a diagram. In the drawing, 1 is the hood body, 2 is a ventilation fan (blower), 4 is a motor, 11 is a hood front plate, 17 is a cover, 18 is a first switch, 19 is an operator, 2
0 indicates the second switch.

Claims (1)

[Scope of Claims] 1. A hood main body with an open front and bottom surface and equipped with a blower, and a first hood main body that is provided on the hood main body and turns off when an operator is pressed to interrupt the energization path of the motor of the blower. a switch, which is rotatably and removably pivoted to open and close the front opening of the hood body; when the front opening is in a closed state, the operator of the first switch is pressed and the front opening is opened and closed; a hood front plate that releases the pressure of the operator when the hood is in an open state; and a hood front plate that is turned on when the hood front plate is attached to the hood body and turned off when the hood front plate is removed; and a second switch for cutting off the energization path of the motor. 2. The ventilation device according to claim 1, wherein the hood main body has a cover, and the cover covers both the first and second switches.