Linkage control device of fire extinguishing system and access control system, control box and access control system

Abstract

The utility model provides a linkage control device of a fire extinguishing system and an access control system, a control box and the access control system. The linkage control device comprises a direct current contactor and a fire control module, the direct current contactor comprises a first contact, and the first contact is a normally closed contact; an active signal output end of the fire-fighting control module is connected with a direct-current signal input end of the direct-current contactor; the access control system is connected with a power supply of the access control system through a first contact; the fire-fighting control module is used for outputting an active signal by the active signal output end when a fire-fighting signal is received; the direct current contactor is used for interrupting the connection between the access control system and the power supply under the driving of the active signal; and when the output of the active signal is stopped, the connection between the access control system and the power supply is recovered. According to the device, the linkage of the entrance guard is realized when the fire-fighting signal is output, and the entrance guard recovers control in real time after the fire-fighting signal stops being output, so that the influence time on the clean room is reduced, the construction cost can be reduced, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of access control technology, and more specifically to a linkage control device, control box and access control system for fire protection system and access control system. Background Technology

[0002] The access control system in semiconductor factories is connected to the fire protection system via physical wiring. In the event of a disaster, the power supply to the access control system is cut off via a fire alarm signal to achieve purposes such as personnel evacuation and isolation control.

[0003] Existing linkage control devices typically employ the following linkage methods:

[0004] 1. The use of trip switch linkage means that the system cannot automatically recover after linkage is completed, requiring manual intervention. In cases with many linkage points, this consumes a lot of manpower and the recovery is not timely enough, leading to temperature and humidity drift in the cleanroom of the semiconductor factory.

[0005] Second, the method of using fire alarm point linkage access control controllers involves configuring fire control modules at each point / area, and the access control linkage of fire alarm points is controlled by integrated circuits. In special circumstances, if the chip fails, the linkage will fail, and this method has a high construction cost.

[0006] Third, the solid-state relay linkage method requires the fire control module to undergo signal conversion to achieve compatibility during linkage. Furthermore, the solid-state relay requires a switching power supply for daily operation, and long-term power supply will reduce its service life.

[0007] Therefore, ensuring effective coordination and timely recovery, minimizing the impact time on cleanrooms, and reducing construction costs while extending their service life have become urgent issues to be addressed. Utility Model Content

[0008] This utility model was proposed in consideration of the above-mentioned problems. This utility model provides a linkage control device, control box, and access control system for a fire protection system and an access control system, which not only ensures effective linkage and timely recovery, reducing the impact time on cleanrooms, but also lowers construction costs.

[0009] The first aspect of this utility model provides a linkage control device for a fire protection system and an access control system, comprising: a DC contactor and a fire control module, wherein the DC contactor includes a first contact, which is a normally closed contact;

[0010] The active signal output terminal of the fire control module is connected to the DC signal input terminal of the DC contactor, and the access control system is connected to the power supply of the access control system via the first contact.

[0011] The fire control module is used to output an active signal at the active signal output terminal when a fire signal is received.

[0012] The DC contactor is used to interrupt the connection between the access control system and the power supply under the drive of the active signal; and to restore the connection between the access control system and the power supply when the active signal stops outputting.

[0013] In some embodiments of this utility model, the power supply is a two-phase AC power supply, the first end of the normally closed contact is connected to the live wire end of the power supply, the second end of the normally closed contact is connected to the first power signal terminal of the access control system, and the neutral wire end of the power supply is connected to the second power signal terminal of the access control system.

[0014] In some embodiments of this utility model, the DC contactor further includes a second contact, which is a dry contact, and the second contact is connected to the feedback signal input terminal of the fire control module.

[0015] In some embodiments of this utility model, the linkage control device further includes indicator lights;

[0016] The indicator light is connected to the power supply of the access control system via the first contact.

[0017] In some embodiments of this utility model, the linkage control device further includes at least one first switching device;

[0018] At least one of the first switching devices is connected in series between the DC contactor and the access control system.

[0019] In some embodiments of this utility model, there are multiple first switching devices, and the access control system includes multiple access control subsystems, with each first switching device connected to one of the multiple access control subsystems.

[0020] In some embodiments of this utility model, the linkage control device further includes a second switching device; the second switching device is connected in series between the first contact and the power supply.

[0021] In some embodiments of this utility model, the rated voltage of the DC contactor coil is 24V, with a fluctuation range of 85% to 110%.

[0022] The second aspect of this utility model provides a linkage control box for a fire protection system and an access control system, including a box body and a linkage control device for a fire protection system and an access control system as described in any one of the first aspects above, wherein the linkage control device is fixedly installed in the linkage control box.

[0023] The third aspect of this utility model provides an access control system, which includes a linkage control device for the fire protection system and the access control system as described in any one of the first aspects above.

[0024] The linkage control device for the fire protection system and access control system of this utility model embodiment, through DC contactor and fire control module, can realize the linkage of access control when the fire signal is output. After the fire signal stops output, the access control system can resume control in real time, reducing the impact time on the clean room, minimizing the impact on production, and reducing construction costs and increasing service life. Attached Figure Description

[0025] The above and other objects, features, and advantages of this utility model will become more apparent from the more detailed description of the embodiments thereof in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this utility model and form part of the specification. They are used together with the embodiments of this utility model to explain the utility model and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0026] Figure 1 This is a schematic structural diagram of a fire protection system and access control system linkage control device according to an embodiment of the present utility model;

[0027] Figure 2 This is a schematic structural diagram of a fire protection system and access control system linkage control device according to another embodiment of the present utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] 110. Fire control module;

[0030] 120. DC contactor;

[0031] 121. First contact point;

[0032] 122. Second contact point;

[0033] 130. First switching device;

[0034] 140. Second switching device;

[0035] 210. Power supply;

[0036] 220. Access control system. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model more apparent, exemplary embodiments according to this utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this utility model, and not all embodiments of this utility model. It should be understood that this utility model is not limited to the exemplary embodiments described herein. Based on the embodiments of this utility model described herein, all other embodiments obtained by those skilled in the art without inventive effort should fall within the protection scope of this utility model.

[0038] First, refer to Figure 1 This invention describes a linkage control device for a fire protection system and an access control system according to embodiments of the present invention. The linkage control device for the fire protection system and the access control system of the present invention can be installed independently or integrated into the access control system; this application does not limit the installation method of the linkage control device for the fire protection system and the access control system.

[0039] like Figure 1 As shown, this application proposes a linkage control device for a fire protection system and an access control system, including: a fire control module 110 and a DC contactor 120. The DC contactor 120 includes a first contact 121, which is a normally closed contact. The active signal output terminal of the fire control module 110 is connected to the DC signal input terminal of the DC contactor 120, and the access control system 220 is connected to the power supply 210 of the access control system 220 via the first contact 121.

[0040] The fire control module 110 is used to output an active signal at the active signal output terminal when a fire signal is received.

[0041] The fire control module 110 in this application can communicate with the fire alarm controller. After receiving the start command from the fire alarm controller, it activates the output relay and outputs an active signal. Here, the active signal can be a DC voltage signal, which drives the contact state change of the DC contactor. Therefore, the active signal voltage should be greater than or equal to the rated voltage of the DC contactor coil.

[0042] DC contactor 120 is used to interrupt the connection between access control system 220 and power supply 210 under the drive of an active signal; and to restore the connection between access control system 220 and power supply 210 when the active signal stops output.

[0043] In this application, the DC contactor 120 refers to a contactor whose core is controlled by a DC coil, and its load can be DC or AC. When the access control system uses AC power, the DC contactor 120 should be a contactor that can be connected to an AC load; when the access control system uses DC power, the DC contactor 120 should be a contactor that can be connected to a DC load.

[0044] The DC contactor 120 may include normally closed contacts and normally open contacts. When a DC signal is input to the DC signal input terminal, the contactor coil is energized, and the coil current generates a magnetic field, causing the stationary iron core to generate an electromagnetic attraction that draws the moving iron core, thus actuating the contacts: the normally closed contacts open, and the normally open contacts close. When the coil is de-energized, the electromagnetic attraction disappears, and the armature is released under the action of the release spring, causing the contacts to return to their original state: the normally open contacts open, and the normally closed contacts close. In this application, the first contact 121 is a normally closed contact.

[0045] Since the first contact 121 is a normally closed contact, it does not require power supply during daily operation, and the device life can be extended by more than 10 times. Therefore, it effectively improves the service life of the linkage control device and solves the problem of reduced service life due to long-term power supply. It also helps to maintain the stability of the overall access control system and reduce the failure rate.

[0046] When a fire occurs, the fire control module 110 sends an active signal. At this time, the DC contactor 120 receives the active signal from the fire control module 110, energizing its coil. The coil current generates a magnetic field, which causes the stationary iron core to generate an electromagnetic attraction, drawing in the moving iron core and actuating the AC contactor. The normally closed contact opens, stopping power supply to the access control system to disable it, allowing the door to be opened for emergency evacuation. When the fire is extinguished, the fire control module 110 stops outputting active signals, the DC contactor 120 coil is de-energized, the electromagnetic attraction disappears, the iron core is released by the release spring, the normally closed contact returns to its original position, and power supply to the access control system resumes.

[0047] The fire protection system and access control system linkage control device of this utility model realizes the automation process of fire control and access control through DC contactors and fire control modules: when a fire signal is output, the access control can be linked to ensure the normal opening of evacuation doors; after the fire signal stops outputting, the access control system can resume control in real time, reducing labor costs and minimizing the impact time on cleanrooms. This minimizes the impact on production and, without the need for integrated circuit control, effectively reduces construction costs.

[0048] In one embodiment of this application, the power supply is a two-phase AC power supply. The first end of the normally closed contact is connected to the live wire of the power supply, the second end of the normally closed contact is connected to the first power signal terminal of the access control system, and the neutral wire of the power supply is connected to the second power signal terminal of the access control system.

[0049] In this embodiment, the first power signal terminal of the access control system is the live wire terminal, and the second power signal terminal of the access control system is the neutral wire terminal.

[0050] By directly connecting the normally closed contact to the power supply in this embodiment, the fire control module can directly drive the contactor without signal conversion, thus reducing potential points of failure.

[0051] In one embodiment of this application, the DC contactor further includes a second contact, which is a dry contact and is connected to the feedback signal input terminal of the fire control module.

[0052] In this embodiment, the second contact can be either a normally open contact or a normally closed contact.

[0053] When an external device operates, the coil of the DC contactor 120 is energized. The coil current generates a magnetic field, which causes the stationary iron core to generate an electromagnetic attraction that draws the moving iron core. This, in turn, causes the AC contactor to operate, opening the normally closed contact and closing the normally open contact. The fire control module receives the open or closed signal and feeds it back to the fire alarm control panel to achieve feedback.

[0054] In this embodiment, the status of the linkage control device can be monitored in real time by means of a DC-controlled contactor, a fire control module, and feedback signal contacts. Furthermore, since the signal is directly fed back to the fire control module through the contactor contacts, no signal conversion is required, reducing potential points of failure.

[0055] In one embodiment of this application, the linkage control device further includes an indicator light; the indicator light is connected to the power supply of the access control system via a first contact.

[0056] The indicator light is connected to the power supply of the access control system via the first contact, and the access control system is also connected to the power supply of the access control system via the first contact, so the indicator light and the access control system are connected in parallel.

[0057] When the power supply is a two-phase AC power supply, the second end of the normally closed contact is connected to the live wire terminal of the indicator light, and the neutral wire terminal of the power supply is connected to the neutral wire terminal of the indicator light.

[0058] By setting up signal indicator lights, the working status of the linkage control device can be reflected intuitively and promptly, facilitating daily maintenance.

[0059] For ease of viewing, indicators can be mounted on the protective housing of the linkage control device. The protective housing has an opening through which the indicator lights protrude, allowing staff or maintenance personnel to see them and easily perform routine maintenance.

[0060] Next, refer to Figure 2 This invention describes a linkage control device for a fire protection system and an access control system according to an embodiment of the present invention.

[0061] The linkage control device in this embodiment can be applied to electronic technology plants, chemical plants, automobile plants, office buildings, etc. The following example is a semiconductor plant.

[0062] like Figure 2 As shown in the embodiments of this application, the linkage control device for the fire protection system and the access control system includes a fire control module 110, a DC contactor 120, at least one first switching device 130 and a second switching device 140.

[0063] The DC contactor 120 includes a first contact 121 and a second contact 122; the first contact 121 is a normally closed contact, and the second contact 122 can be either a normally open contact or a normally closed contact. The second contact 122 is a dry contact and is connected to the feedback signal input terminal of the fire control module 110. The active signal output terminal of the fire control module 110 is connected to the DC signal input terminal of the DC contactor 120.

[0064] In this embodiment, the relay contact capacity of the fire control module is DC 30V / 2A.

[0065] In this embodiment, the rated voltage of the DC contactor coil is 24V DC, with a fluctuation range of 85% to 110%.

[0066] At least one first switching device 130 is connected in series between the first contact 121 of the DC contactor 120 and the access control system 220 of the semiconductor plant. The access control system 220 is connected to the power supply 210 of the access control system 220 via the first contact 121.

[0067] In this embodiment, the first switching device 130 is used to control the circuit connection between the first contact 121 and the access control system 220. When the power supply 210 supplies power to the access control system 220, the power supply of the access control system 220 can be controlled by the first switching device 130, so that maintenance personnel can conveniently perform daily maintenance and repair.

[0068] The first switching device 130 can be an air switch, a relay, etc. This application does not specifically limit the first switching device.

[0069] When the access control system includes multiple access control subsystems, for example, each access control subsystem is located on a different floor and / or in a different unit, there can be multiple first switching devices, each of which is connected to one of the multiple access control subsystems. The first switching device 130 is used to control the circuit connection between the first contact 121 and the access control subsystem.

[0070] It should be noted that although the access control system here is divided into multiple access control subsystems, these multiple access control subsystems still respond to the same fire signal and perform linkage control.

[0071] Taking circuit breakers as an example, each circuit breaker is connected to a different access control subsystem.

[0072] When the access control subsystem corresponding to each air switch malfunctions, only the corresponding air switch can be disconnected without affecting the normal operation of the access control subsystem controlled by other air switches, thus enabling tiered inspection and maintenance.

[0073] The linkage control device may also include a second switching device 140, which is connected in series between the first contact 121 and the power supply 210. The first switching device 130 may be an air switch, a relay, etc., and this application does not specifically limit the first switching device.

[0074] The second switching device 140 can be an air switch, a relay, etc. This application does not specifically limit the second switching device.

[0075] The second switching device 140 is used for the circuit connection between the power supply 210 and the first contact 121.

[0076] When powering on the access control subsystem, first keep all air switches in the open state, then close the second switching device 140, and then close each of the first switching devices 130 respectively, thereby realizing the power supply to each access control subsystem.

[0077] When the power needs to be cut off during maintenance of the entire access control system of the semiconductor factory, the second switching device 140 can be directly disconnected, thereby improving the maintenance efficiency of the access control system.

[0078] In this embodiment, the linkage control device can achieve linkage by connecting multiple access control subsystems of an entire floor / building, thereby reducing the construction cost of the linkage control device.

[0079] It should be noted that the linkage control device can be added or removed according to actual needs, and the number of fire control modules or DC contactors can be adjusted for different building types, floors, areas, and systems.

[0080] For example, when each floor or area needs to respond to different fire signals for linkage control, fire control modules and DC contactors can be installed on each floor or area separately.

[0081] The working process of the linkage control device is as follows:

[0082] The fire alarm system detects the fire alarm signal via on-site detectors and sends an action signal to the fire control module through the fire alarm control panel. Upon receiving the signal, the fire control module outputs a 24V DC voltage to the DC control terminal of the DC contactor. Upon receiving the control voltage, the DC contactor coil actuates, driving the first contact to switch to the normally open state. The access control switch downstream of the DC contactor automatically de-energizes, and the on-site access control system automatically releases. Simultaneously, the DC contactor sends a feedback signal to the fire control module, which then relays the signal to the backend fire alarm system.

[0083] When the fire alarm signal is withdrawn, the 24V DC voltage output by the fire control module disappears simultaneously. Under the mechanical force of the internal spring, the DC contactor returns from its normally open state to its normally closed state. After the DC contactor returns to the normally closed state, the downstream load automatically resets, and the on-site access control system resumes its control state. Simultaneously, the DC contactor feeds back a signal to the fire alarm module. Upon receiving the signal, the fire alarm system confirms that the on-site access control system has resumed control.

[0084] The linkage control device provided in this embodiment is a highly efficient and low-cost automated control device. It can not only prevent the temperature and humidity of the cleanroom in the semiconductor factory from drifting, thereby ensuring the temperature and humidity of the cleanroom, but also significantly reduce the human intervention of the access control system in the semiconductor factory, saving the construction cost of the access control system.

[0085] This application also provides a linkage control box for a fire protection system and an access control system, including a box body and a linkage control device for the fire protection system and access control system as described in any of the above embodiments, wherein the linkage control device is fixedly installed in the linkage control box.

[0086] This application also provides an access control system, which includes a linkage control device between the fire protection system and the access control system as described in any of the above embodiments.

[0087] The fire protection system and access control system linkage control box and access control system of this application embodiment can achieve the same technical effect because they adopt the above-mentioned fire protection system and access control system linkage control device. The structure of other component circuits or components included in the linkage control box and access control system can be implemented using existing technology, and will not be described in detail here.

[0088] Although exemplary embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above exemplary embodiments are merely illustrative and are not intended to limit the scope of the invention. Various changes and modifications can be made therein by those skilled in the art without departing from the scope and spirit of the invention. All such changes and modifications are intended to be included within the scope of the invention as claimed in the appended claims.

[0089] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0090] Similarly, it should be understood that, in order to simplify the present invention and aid in understanding one or more aspects of the various inventions, in the description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of the present invention should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the corresponding claims, its novelty lies in the fact that the corresponding technical problem can be solved with fewer features than all of a single disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the present invention.

[0091] Those skilled in the art will understand that, apart from the mutual exclusion of features, all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or apparatus so disclosed can be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0092] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0093] It should be noted that the above embodiments are illustrative of the present invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0094] The above description is merely a specific embodiment of this utility model or an explanation of that embodiment. The scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. The scope of protection of this utility model shall be determined by the scope of the claims.

Claims

1. A linkage control device for a fire protection system and an access control system, characterized in that, include: A DC contactor and a fire control module, wherein the DC contactor includes a first contact, which is a normally closed contact; The active signal output terminal of the fire control module is connected to the DC signal input terminal of the DC contactor, and the access control system is connected to the power supply of the access control system via the first contact. The fire control module is used to output an active signal at the active signal output terminal when a fire signal is received. The DC contactor is used to interrupt the connection between the access control system and the power supply under the drive of the active signal; and to restore the connection between the access control system and the power supply when the active signal stops outputting.

2. The linkage control device for the fire protection system and access control system as described in claim 1, characterized in that, The power supply is a two-phase AC power supply. The first end of the normally closed contact is connected to the live wire of the power supply, the second end of the normally closed contact is connected to the first power signal terminal of the access control system, and the neutral wire of the power supply is connected to the second power signal terminal of the access control system.

3. The linkage control device for the fire protection system and access control system as described in claim 2, characterized in that, The DC contactor also includes a second contact, which is a dry contact, and is connected to the feedback signal input terminal of the fire control module.

4. The linkage control device for the fire protection system and access control system as described in claim 2, characterized in that, The linkage control device also includes indicator lights; The indicator light is connected to the power supply of the access control system via the first contact.

5. The linkage control device for the fire protection system and access control system as described in any one of claims 1 to 4, characterized in that, The linkage control device also includes at least one first switching device; At least one of the first switching devices is connected in series between the DC contactor and the access control system.

6. The linkage control device for the fire protection system and access control system as described in claim 5, characterized in that, There are multiple first switching devices, and the access control system includes multiple access control subsystems. Each first switching device is connected to one of the multiple access control subsystems.

7. The linkage control device for the fire protection system and access control system as described in any one of claims 1 to 4, characterized in that, The linkage control device further includes a second switching device, which is connected in series between the first contact and the power supply.

8. The linkage control device for the fire protection system and access control system as described in any one of claims 1 to 4, characterized in that, The rated voltage of the DC contactor coil is 24V, with a fluctuation range of 85% to 110%.

9. A linkage control box for a fire protection system and an access control system, characterized in that, The system includes a housing and a linkage control device for the fire protection system and access control system as described in any one of claims 1-8, wherein the linkage control device is fixedly installed in the linkage control housing.

10. An access control system, characterized in that, The access control system includes the linkage control device between the fire protection system and the access control system as described in any one of claims 1-8.

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