JPH0579889B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a ventilation hood disposed above a kitchen range.

[Background Art] Conventionally, in this type of ventilation hood that is placed above a kitchen range, a ventilation fan placed inside the hood is controlled by an operation switch on an operation display section provided on the hood body. Although it is becoming like that,
Couldn't control it from anywhere else. Therefore, if it becomes necessary to remotely control the operation of the ventilation fan from an operation display located at another location, or to control the operation of the ventilation fan using the output of a sensor such as a gas leak sensor or smoke sensor, multi-point control is required. This necessitates complicated wiring changes or changes to the circuit configuration of the control circuit section for sensor control, which poses a problem in that multi-point control or sensor control cannot be easily accommodated.

[Object of the Invention] The present invention has been made in view of the above points, and its purpose is to easily support multi-point control or sensor control without changing the circuit configuration of the control circuit section. Our goal is to provide ventilation hoods that can.

[Disclosure of the Invention] (Embodiment) Fig. 1 shows an embodiment of the present invention, which shows a ventilation fan 1 arranged in a hood, a control circuit section 3 for controlling the ventilation fan 1, and a ventilation fan 1 arranged in a hood. In a ventilation hood comprising an operation display unit 4 equipped with an operation switch for setting the operating state of the fan 1 and an operation display lamp for displaying the operating state, an external controller 6 controls the operation of the ventilation fan 1 from the outside.
a, a control terminal section 5 is provided to which an external control means such as an additional operation section 6b is connected, and in the embodiment, the control circuit section 3 also includes an illumination lamp 2 for illuminating the range section. It's becoming controlled.

FIG. 2 shows a specific circuit example of the above embodiment, in which the control circuit section 3 steps down the commercial power AC (100V
→24V), a power supply circuit DC consisting of a step-down transformer Tr, a diode bridge DB, a three-terminal regulator VR, a diode _D0, etc.
Latching relay RY ₀ for off, ventilation fan 1
A relay circuit consisting of relays RY ₁ and RY ₂ for strong and weak switching, relay RY ₃ for lighting control, and an inverter.
It is formed of a relay control circuit consisting of I ₁ to I ₆ , flip-flops FF ₁ and FF ₂ , transistors Q ₁ to Q ₃ , and diodes D ₁ to D ₁₇ . In addition, the operation display section 4
The operation consists of push button switches such as an operation switch S ₁ for turning on the power, an operation switch S ₂ for turning off the power, an operation switch S ₃ for changing the strength of the ventilation fan 1, and an operation switch S ₄ for turning the lighting lamp 2 on and off. Light emitting diode L ₁ (red) for indicating strong operation of the switch section and ventilation fan 1, light emitting diode L ₂ (green) for indicating weak operation, and light emitting diode L ₃ for indicating lighting lamp lighting.
(red) and the control circuit section 3 through each terminal T ₁ to _{T 13} of the control terminal section 5.
It is connected to the. Note that the external controller 6a
is to remotely control the ventilation hood using sensor output and telecontroller output, and output contacts S _{1 ′ and S 2 ′ are connected via diodes D 1 ′ and} D ₂ ′ corresponding to diodes D ₁ and D ₂ . By connecting to terminals T ₂ and T ₃ , you can turn the power on and off using the external controller 6.
It can be controlled by the control output of a. Further, the additional operation section 6b is formed of an operation switch similar to the operation display section 4, and is connected in parallel to the terminals _T4 to _T8 of the control terminal section 5.

The operation of the embodiment will be specifically explained below.

Now, when the power-on operation switch _S1 is turned on, a set current flows to the set coil Ls of the latching relay _RY0 via the diodes _D1 , _D3 and the auxiliary contact _r0b , and the relay contact _r0a , r ₀ b are switched to the set side, and a base bias is applied to the transistors Q ₁ to _{Q 3} via the main contact r ₀ a.
In this state, when the non-inverting output of flip-flop FF _{1 is} "H", transistor Q ₁ is turned on, relay RY ₁ is activated, the normally open side of relay contact r ₁ is turned on, and transistor Q ₂ turns off, the normally closed side of relay contact r ₂ of relay RY ₂ is turned on, so commercial power AC is supplied to the high-speed drive terminal of induction motor IM of ventilation fan 1, and ventilation fan 1
operates in strong exhaust mode. On the other hand, when the inverted output of flip-flop FF ₁ is "H", transistor Q ₂ is turned on, relay RY ₂ is operated, the normally open side of relay contact r ₂ is turned on, and transistor Q ₁ is turned off. Since the normally closed side of relay contact r ₁ of relay RY ₁ is turned on, commercial power AC is supplied to the low-speed drive terminal of induction motor IM of ventilation fan 1, and ventilation fan 1 is in weak exhaust mode. Operate. Furthermore, when the non-inverting output of flip-flop FF ₂ is "H", transistor Q ₃ is turned on and relay RY ₃ is turned on.
operates, commercial power AC is supplied to the lighting lamp 2 through the normally open side of relay contact r ₃ , lighting the lighting lamp 2, and the non-inverting output of the flip-flop FF ₂ becomes “L”. ”, the transistor Q ₃ is turned off, the operation of the relay RY ₃ is stopped, the normally open side of the relay contact r ₃ is turned off, and the illumination lamp 2 is turned off. Here, the above relays RY ₁ to _{RY 3} are connected in parallel with light emitting diodes L ₁ to RY 3.
Since _L3 is connected, the strength operation mode of the ventilation fan 1 and the blinking state of the illumination lamp 2 are accurately displayed in conjunction with the operation of the relays _RY1 to _RY3 . By the way, ventilation fan 1
The strength mode can be switched in sequence from strong to weak to strong to weak by reversing flip-flop FF ₁ every time an on-pulse generated by pressing the operation switch _S3 is obtained. The lighting lamp 2 is switched on and off by inverting the flip-flop FF ₂ every time an on pulse generated by pressing the operation switch S ₄ is turned on → off → on → off... It is possible to switch sequentially so that...

Next, when the power off operation switch _S2 is turned on, a reset current flows through the diodes _D2 , _D4 and the auxiliary contact _r0b to the reset coil Lr of the latching relay _RY0 , and the relay contact _r0 a, r ₀ b are switched to the reset side, and transistors Q ₁ to
Q ₃ base bias is no longer applied. Therefore, transistors Q ₁ to _{Q 3} are both turned off, relay contacts r ₁ to _{r 3} of relays RY ₁ to _{RY 3} are switched to the normally closed side, ventilation fan 1 is stopped, and lighting lamp 2 is turned off. The lights are starting to be turned off. In the embodiment, from a practical point of view, the lighting lamp 2 is turned on and off by an independent operation switch _S4 , and the lighting lamp 2 is turned on independently from the operation of the ventilation fan 1. It goes without saying that the lamp 2 may be turned on by the operation switch _S1 in conjunction with the operation of the ventilation fan 1.

Next, the external controller 6a, which is an external control means for externally controlling the operation of the ventilation fan 1, performs the same operation as when the ON operation switch _S1 is turned on by turning on the output contact _S1 '. signal is T ₂
When the contact output _S2 ' is turned on, the same signal as when the off operation switch _S2 is turned on is input to the _T2 terminal, and the contact output S2' is turned on. The power can be turned on and off using ₁ ' and S2 _' . Note that the terminal _T1 is a power supply terminal for supplying power from the control circuit section 3 to the external controller 6a. Furthermore, the control operations performed by operating the operation switches (switches corresponding to switches S ₁ to _{S 4} ) of the additional operation section 6b are completely the same as the control operations performed by the operation display section 4, so the explanation thereof will be omitted.

By the way, in the present invention, the ventilation fan 1
and a control circuit section 3 that controls the illumination lamp 2,
Since the operation switches S ₁ to S ₄ are formed so as to be sequentially switched by the on-pulse signal generated by the ON operation of the switches S ₁ to S 4
By connecting S ₄ in parallel to terminals T ₄ to _{T 8} ,
External control means can be easily added without changing the circuit configuration, and multi-point control or sensor control can be easily supported.

[Effects of the Invention] As described above, the present invention includes a ventilation fan disposed in a hood, a control circuit unit that controls the ventilation fan, an operation switch that sets the operating state of the ventilation fan, and an operating switch that controls the operating state. In a ventilation hood consisting of an operation display section equipped with an operation indicator lamp, the control circuit section is configured to sequentially switch and control the operation of the ventilation fan using on-pulses generated by turning on an operation switch consisting of a push button switch. It is equipped with a control terminal section for connecting an external control means to which a plurality of operation switches can be freely connected in parallel, and the external control means can be connected to the control terminal section without changing the circuit configuration of the control circuit section. This has the effect of easily supporting multi-point control or sensor control just by connecting.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram of one embodiment of the present invention, and FIG. 2 is a specific circuit diagram of the same. 1 is a ventilation fan, 2 is a lighting lamp, 3 is a control circuit section, 4 is an operation display section, and 5 is a control terminal section.

Claims (1)

[Claims] 1. A ventilation fan disposed in the hood, a control circuit section for controlling the ventilation fan, an operation display section equipped with an operation switch for setting the operating state of the ventilation fan, and an operation indicator lamp for displaying the operating state. In the ventilation hood, a control circuit is formed to sequentially switch and control the operation of the ventilation fan by the on-pulse generated by turning on the operation switch consisting of a push button switch, and multiple operation switches are connected in parallel. A ventilation hood characterized by being provided with a control terminal section for freely connecting an external control means.