JPH0336368Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an automatic return circuit for smoke prevention equipment in a system using a plurality of smoke prevention equipment.

[Background technology]

Conventionally, in a disaster prevention system that has multiple smoke prevention devices, when resetting a smoke prevention device, one operation is required each time one smoke prevention device is reset, and multiple smoke prevention devices In order to restore the device, multiple operations are required and the operation is troublesome.

[Purpose of invention]

The purpose of the present invention is to make it possible to control the return of all of a plurality of smoke prevention devices with a single operation, and to be able to grasp the return status.

[Disclosure of invention]

Example In the figure, the return operation section 1 is a return switch.
By turning on _{SW 1 ,} relay R _X is driven and self- _maintained by contact r _{L ​ The} sequential starting circuit _section 2 is driven by _the contact _{rX2 of the} relay R r _B1 and r _Bo form a return control section 3, which causes a smoke prevention device (not shown) to perform a return operation. This return operation is confirmed by the device operation confirmation section 4,
When the reset state is reached, the relays R _A1 and R _Ao connected to the respective smoke prevention devices will no longer operate, and the relay contacts r _A1 and r _Ao provided on the operation confirmation display section 5 will be turned off. Therefore, relays R _C1 and R _Co operate according to the operating status of each smoke prevention device, and their contacts r _C1 and
r _Co operates as a monitor contact that turns off when each smoke prevention device returns to its normal state, and by sequentially connecting these contacts r _C1 and r _Co to the starting circuit section 2, control relays R _B1 and R _Bo can be controlled. Other contacts r _a1 and r _ao of relays R _A1 and R _Ao are connected in parallel and connected in series to relay R _Y. Therefore, when each smoke prevention device returns to its normal state, contact r _Y turns off. Individual starting circuit 6
is for individually driving control relays R _B1 and R _B2 .

Operation Start recovery control by turning on recovery switch _SW1 . When reset switch SW ₁ is turned on,
Relay R _X operates, enters the self-holding state, and indicator lamp L _X lights up. The indicator lamp _L Further, by operating the relay R _X , the starting circuit section 2 is sequentially operated, and recovery control is started. Usually, it takes 20 to 30 seconds to control the return of the damper, so the control relays R _B1 and R _Bo are sequentially activated every 20 to 30 seconds via a timer. At this time,
Relays R _C1 and R _Co monitor the operating status of each smoke prevention device, and when the smoke prevention device returns to its normal state, contacts r _C1 and r _Co turn off, and control relays R _B1 and R _Bo
is also turned off. Lamps L ₁ and L _o indicate the operating status of the smoke prevention equipment and turn off when the equipment returns to normal operation.

[Effect of idea]

As described above, the present invention includes a return operating section having a relay that is self-maintained when a return switch is turned on;
The monitor is equipped with a sequential start circuit that drives a control relay that is driven by the relay contacts of the return operation unit and sequentially returns the smoke prevention equipment via a timer, and is controlled by the equipment operation confirmation unit and turns off when the return state is reached. Since the control relay is turned off by the contact, it is possible to control the return of all the plurality of smoke prevention devices with a single operation, and the return status can be reliably grasped.

[Brief explanation of the drawing]

The figure is a circuit diagram of an embodiment of the present invention. 1... Return operation section, 2... Sequential starting circuit section, 4
...Equipment operation confirmation section, SW ₁ ...Return switch,
R _X ...Relay, _rX2 ...Contact, R _B1 , R _Bo ...Control relay, r _C1 , r _Co ...Monitor contact.

Claims (1)

[Scope of utility model registration request] a return operating section having a relay that self-holds when a return switch is turned on; and a sequential starting circuit section that drives a control relay that is driven by the contact point of the relay of the return operating section and sequentially returns the smoke prevention equipment via a timer. An automatic reset circuit for smoke prevention equipment, comprising: a monitor contact that is controlled by an equipment operation confirmation section and turns off when the equipment is in a reset state; the control relay is turned off;