Power supply box and relay holding circuit

Abstract

The utility model discloses a power supply box and a relay holding circuit, the power supply box comprises a relay assembly, a central control interface and a latch circuit, the central control interface is used for accessing an intelligent central control and the latch circuit, and the latch circuit is respectively connected with the central control interface and a controlled end of the relay assembly; and the latch circuit is used for enabling the central control interface to output a control signal output by the intelligent central control to the relay assembly, and controlling the relay assembly to keep a working state when the central control interface is not connected to the intelligent central control, so that the relay state is kept after the intelligent central control is disconnected from the power supply box. The power supply box does not comprise an MCU and a magnetic latching relay, can realize relay state maintenance after the intelligent central control and the power supply box are disconnected, and is simple in circuit structure, relatively low in cost and beneficial to popularization and application.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply box and relay holding, in particular to a power supply box and a relay holding circuit. Background Art

[0002] The power supply box is a device used to provide electrical energy to the load, which is usually equipped with relays inside to connect various loads. The power supply box is usually used in conjunction with an intelligent central control system to control the working state of the relays through the intelligent central control. However, the existing power supply box and the intelligent central control are mostly detachable, such as through magnetic suction or snap connection. However, after the intelligent central control is disconnected from the power supply box, the working state of the relay may change, thereby affecting the normal operation of the load. Utility Model Content

[0003] The main purpose of the utility model is to provide a power supply box, aiming to achieve the maintenance of the relay state after the intelligent central control is separated from the power supply box.

[0004] In order to achieve the above-mentioned object, the utility model provides a power supply box, which comprises:

[0005] Relay components;

[0006] Central control interface, which is used to access the intelligent central control;

[0007] A latch circuit, the latch circuit being connected to the central control interface and the controlled end of the relay assembly respectively;

[0008] The latch circuit is used to enable the central control interface to output the control signal output by the intelligent central control to the relay component, and to control the relay component to maintain a working state when the central control interface is not connected to the intelligent central control.

[0009] Optionally, the latch circuit includes a latch, a first input end of the latch being used to connect to a first output end of the intelligent central control via the central control interface, a second input end of the latch being used to connect to a second output end of the intelligent central control via the central control interface, and an output end of the latch being electrically connected to the relay assembly.

[0010] Optionally, the power supply box also includes a switching circuit, which is electrically connected to the latch circuit and the relay assembly respectively; the switching circuit is used to control the working state of the relay assembly according to the latch signal output by the latch circuit.

[0011] Optionally, the switching circuit includes a switching tube, the output end of the latch circuit is connected to the controlled end of the switching tube, the first end of the switching tube is electrically connected to the relay assembly, and the second end of the switching tube is grounded.

[0012] Optionally, the switching circuit further includes a first diode, the first diode is electrically connected to the first end of the switching tube, and the first diode is connected in parallel to the control end of the relay assembly.

[0013] Optionally, the switch circuit further includes a second diode, a cathode of the second diode is connected to the control end of the switch tube, and an anode of the second diode is grounded.

[0014] Optionally, the power supply box also includes a power supply circuit, and the power supply circuit is used for power supply.

[0015] Optionally, the power supply circuit includes at least one of an AC-DC power supply and a POE power supply.

[0016] Optionally, the central control interface includes at least one of a Pogopin, a pin header, and a PoE network port.

[0017] The utility model also proposes a relay holding circuit, which includes the power supply box and the intelligent central control, and the intelligent central control can be connected to the power supply box via the central control interface.

[0018] The technical solution of the utility model adopts the power supply box including a relay component, a central control interface and a latch circuit, wherein the central control interface is used to access the intelligent central control, and the latch circuit is respectively connected to the central control interface and the controlled end of the relay component; the latch circuit is used to enable the central control interface to output the control signal output by the intelligent central control to the relay component, and when the central control interface is not connected to the intelligent central control, control the relay component to maintain the working state, thereby realizing the relay state retention after the intelligent central control is disconnected from the power supply box. The power supply box does not include an MCU or a magnetic latching relay, so that the relay state retention can be realized after the intelligent central control is disconnected from the power supply box. The circuit structure is simple, the cost is low, and it is conducive to popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative work, other drawings obtained according to the structures shown in these drawings are also within the protection scope of this application.

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of a power supply box of the utility model;

[0021] Figure 2It is a structural schematic diagram of another embodiment of the power box of the utility model.

[0022] Description of Figure Numbers:

[0023] Label name Label name 10 Central control interface 20 Latch Circuit 30 Relay components 40 Intelligent central control 50 Switching Circuit 60 Power Circuit U1 Latch Q1 Switching tube D1 The first diode ZD1 The second diode

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0028] The power supply box is a device used to provide electrical energy to the load, and is usually equipped with relays inside to connect various loads. The power supply box is usually used in conjunction with the intelligent central control 40 system, and the working state of the relay is controlled by the intelligent central control 40. However, the existing power supply box and the intelligent central control 40 are mostly detachable, such as by magnetic attraction or snap connection. However, after the intelligent central control 40 is separated from the power supply box, the working state of the relay may change, thereby affecting the normal operation of the load.

[0029] The utility model provides a power supply box, which aims to maintain the relay state after the intelligent central control 40 is separated from the power supply box.

[0030] refer to Figure 1In one embodiment, the power supply box provided by the utility model includes:

[0031] A relay component 30, a central control interface 10 and a latch circuit 20, wherein the central control interface 10 is used to connect to an intelligent central control 40, and the latch circuit 20 is connected to the controlled ends of the central control interface 10 and the relay component 30 respectively; the latch circuit 20 is used to enable the central control interface 10 to output the control signal output by the intelligent central control 40 to the relay component 30, and to control the relay component 30 to maintain a working state when the central control interface 10 is not connected to the intelligent central control 40.

[0032] In this embodiment, the intelligent central control 40 can be various intelligent devices such as intelligent panels, touch screens, smart phones, computers, smart home devices, smart office equipment, etc., which are connected to the power supply box through the central control interface 10 to control the power supply box. The central control interface 10 can be a Pogopin, a pin header, a PoE network port or other interfaces that can be compatible with the intelligent central control 40. The selection of the central control interface 10 can be flexibly configured according to the intelligent central control 40 of different signals and actual application scenarios and requirements. The relay assembly 30 may include components such as relays, switches, and solenoid valves to realize operations such as opening, closing, and switching the load connected to it.

[0033] In this embodiment, the latch circuit 20 can be implemented by electronic components such as latch U1, trigger, flip-flop, etc. When the intelligent central control 40 is connected to the power supply box, after the central control interface 10 receives the control signal output by the intelligent central control 40, it is directly output to the relay assembly 30 through the latch circuit 20, so that the relay assembly 30 is controlled, thereby realizing operations such as opening, closing or switching the load. When the intelligent central control 40 is disconnected from the central control interface 10, the latch circuit 20 latches the control signal output before the intelligent central control 40 is disconnected, so that the relay assembly 30 maintains the working state before the intelligent central control 40 is disconnected.

[0034] In this embodiment, the power supply box includes a relay assembly 30, a central control interface 10 and a latch circuit 20, wherein the central control interface 10 is used to access the intelligent central control 40, and the latch circuit 20 is connected to the controlled end of the central control interface 10 and the relay assembly 30 respectively; the latch circuit 20 outputs the control signal output by the intelligent central control 40 to the relay assembly 30 via the central control interface 10, and controls the relay assembly 30 to maintain the working state when the central control interface 10 is not connected to the intelligent central control 40, thereby realizing the relay state maintenance after the intelligent central control 40 is disconnected from the power supply box. The power supply box does not include an MCU or a magnetic latching relay, and can realize the relay state maintenance after the intelligent central control 40 is disconnected from the power supply box. The circuit structure is simple, the cost is low, and it is conducive to popularization and use.

[0035] Optional, reference Figure 2 In another embodiment of the utility model, the latch circuit 20 includes a latch U1, a first input end of the latch U1 is used to connect to the first output end of the intelligent central control 40 through the central control interface 10, a second input end of the latch U1 is used to connect to the second output end of the intelligent central control 40 through the central control interface 10, and an output end of the latch U1 is electrically connected to the relay assembly 30.

[0036] In this embodiment, when the intelligent central control 40 is connected to the power supply box through the central control interface 10, the first output end of the intelligent central control 40 outputs a power signal to the first input end of the latch U1, and the latch U1 takes effect. The output end voltage of the latch U1 follows the voltage output by the second output end of the intelligent central control 40. When the second output end of the intelligent central control 40 outputs a high level to the second input end of the latch U1, the output end of the latch U1 outputs a high level, so that the relay component 30 is closed to realize the opening of the load connected to the relay component 30; when the second output end of the intelligent central control 40 outputs a low level to the second input end of the latch U1, the output end of the latch U1 outputs a low level, so that the relay component 30 is disconnected to realize the closing of the load connected to the relay component 30. In this embodiment, when the intelligent central control 40 is disconnected from the power supply box, the latch U1 takes effect, thereby latching the signal output before the intelligent central control 40 is disconnected, so that the relay component 30 maintains the working state before the intelligent central control 40 is disconnected, and the working state of the load connected to the relay component 30 is maintained.

[0037] Optionally, in another embodiment of the utility model, the power supply box also includes a switching circuit 50, and the switching circuit 50 is electrically connected to the latch circuit 20 and the relay assembly 30 respectively; the switching circuit 50 is used to control the working state of the relay assembly 30 according to the latch signal output by the latch circuit 20.

[0038] In this embodiment, the switch circuit 50 can be implemented by using components such as a switch tube Q1, a transistor, and an IGPT. The output end of the latch circuit 20 is used to output a latch signal, and the switch circuit 50 controls the working state of the relay assembly 30 according to the latch signal output by the output end of the latch circuit 20. When the latch circuit 20 outputs a high level, the switch circuit 50 is turned on, so that the relay assembly 30 remains in a closed state, thereby achieving continuous power supply to the load; when the latch circuit 20 outputs a low level, the switch circuit 50 is disconnected, so that the relay assembly 30 is disconnected, thereby cutting off the power supply to the load. Therefore, regardless of the connection status between the intelligent central control 40 and the power supply box, the normal operation of the load can be ensured.

[0039] Optionally, in another embodiment of the utility model, the switching circuit 50 includes a switching tube Q1, the output end of the latch circuit 20 is connected to the controlled end of the switching tube Q1, the first end of the switching tube Q1 is electrically connected to the relay assembly 30, and the second end of the switching tube Q1 is grounded.

[0040] In this embodiment, when the latch circuit 20 outputs a high level, the switch tube Q1 is turned on, so that the relay assembly 30 remains in a closed state, thereby realizing continuous power supply to the load; when the latch circuit 20 outputs a low level, the switch circuit 50 is turned off, so that the relay assembly 30 is turned off, thereby cutting off the power supply to the load. Therefore, no matter what the connection state between the intelligent central control 40 and the power supply box is, the normal operation of the load can be ensured.

[0041] Optionally, in another embodiment of the present invention, the switch circuit 50 further includes a first diode D1, the first diode D1 is electrically connected to the first end of the switch tube Q1, and the first diode D1 is connected in parallel to the control end of the relay assembly 30.

[0042] In this embodiment, the anode of the first diode D1 is connected to the first end of the switch tube Q1, the cathode of the first diode D1 is connected to the power circuit, and the first diode D1 is connected in parallel to the control end of the relay assembly 30. When the latch circuit 20 is converted from an output high level to an output low level, the switch tube Q1 is correspondingly converted from an on state to an off state, and the internal coil of the relay assembly 30 generates an induced voltage due to the off action of the switch tube Q1. The current generated by the induced voltage can be discharged through the first diode D1, realizing the freewheeling effect of the relay assembly 30, thereby protecting the circuit in the power supply box.

[0043] Optionally, in another embodiment of the present invention, the switch circuit 50 further includes a second diode ZD1, a cathode of the second diode ZD1 is connected to the control end of the switch tube Q1, and an anode of the second diode ZD1 is grounded.

[0044] In this embodiment, the second diode ZD1 is a voltage stabilizing diode. When the pulse voltage exceeds the reverse breakdown voltage of the second diode ZD1, the second diode ZD1 can stabilize the pulse voltage within a preset voltage range, effectively preventing the transient pulse high voltage or burrs generated at the central control interface 10 when the intelligent central control 40 is plugged in and out from damaging the switch circuit 50 through the latch circuit, thereby protecting the subsequent circuit. When the latch circuit 20 outputs a low level, the second diode ZD1 is cut off, and the control terminal voltage of the relay assembly 30 follows the output voltage of the latch circuit 20, ensuring that the control terminal voltage of the relay assembly 30 is stable, avoiding malfunctions caused by fluctuations in the control terminal voltage. In this embodiment, by providing the second diode ZD1, the reliability and stability of the power supply box are further improved.

[0045] Optionally, in an embodiment of the present utility model, the power supply box further includes a power supply circuit 60, and the power supply circuit 60 is used for power supply.

[0046] In this embodiment, the power circuit 60 can adopt AC-DC power supply, POE power supply, voltage-stabilized power supply, battery, solar cell and other power supply modes to provide a stable power supply for the power supply box. The output end of the power circuit 60 is connected to the power input end of the latch circuit 20 and the relay assembly 30 module. When the intelligent central control 40 is connected to the power supply box through the central control interface 10, the power circuit 60 can simultaneously supply power to the intelligent central control 40 to ensure the normal operation of each module.

[0047] Optionally, the power circuit 60 includes at least one of an AC-DC power supply and a POE power supply.

[0048] In this embodiment, the AC-DC power supply is an AC-to-DC power supply, which can convert an external AC power supply into a stable DC power supply to supply the power supply box. The POE power supply is a Power over Ethernet power supply, which provides power to the power supply box through an Ethernet cable and is suitable for a network-accessible intelligent central control 40. The AC-DC power supply and the POE power supply can be used alone or in conjunction with each other to provide a stable power supply for the power supply box, ensuring the normal operation of the intelligent central control 40, the latch circuit 20, the relay assembly 30, and the load connected to the relay assembly 30.

[0049] Optionally, in another embodiment of the utility model, since the central control interface 10 of the central control circuit can be a Pogopin, a pin header, a PoE network port or other interfaces that can be compatible with the intelligent central control 40, it has strong compatibility. The central control interface 10 is connected to the paths of multiple latch circuits 20 and their relay components 30 to achieve the expansion of multiple relays, thereby achieving the maintenance of the status of multiple relays after the intelligent central control 40 is disconnected from the power supply box.

[0050] In this embodiment, the power supply box includes a relay assembly 30, a central control interface 10 and a latch circuit 20, wherein the central control interface 10 is used to access the intelligent central control 40, and the latch circuit 20 is connected to the central control interface 10 and the controlled end of the relay assembly 30 respectively. The power supply box is connected to the intelligent central control 40 through the central control interface 10 to control the relay assembly 30. Moreover, after the intelligent central control 40 is disconnected from the power supply box, the state of the relay can be maintained to ensure the normal operation of the load. The power supply box proposed in the utility model not only improves the reliability of the power supply box, but also greatly reduces the complexity and cost of the system, and has broad application prospects.

[0051] The utility model also provides a relay holding circuit, which includes the power supply box and the intelligent central control 40, and the intelligent central control 40 can be connected to the power supply box via the central control interface 10. The specific structure of the power supply box refers to the above embodiment. Since the relay holding circuit adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0052] The above description is only an optional embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A power supply box, characterized in that: The power supply box comprises: Relay components; Central control interface, which is used to access the intelligent central control; A latch circuit, the latch circuit being connected to the central control interface and the controlled end of the relay assembly respectively; The latch circuit is used to enable the central control interface to output the control signal output by the intelligent central control to the relay component, and to control the relay component to maintain a working state when the central control interface is not connected to the intelligent central control.

2. The power supply box according to claim 1, characterized in that: The latch circuit includes a latch, a first input end of the latch is used to connect to the first output end of the intelligent central control through the central control interface, a second input end of the latch is used to connect to the second output end of the intelligent central control through the central control interface, and an output end of the latch is electrically connected to the relay assembly.

3. The power supply box according to claim 1, characterized in that: The power supply box also includes a switch circuit, which is electrically connected to the latch circuit and the relay assembly respectively; the switch circuit is used to control the working state of the relay assembly according to the latch signal output by the latch circuit.

4. The power supply box according to claim 3, characterized in that: The switch circuit includes a switch tube, the output end of the latch circuit is connected to the controlled end of the switch tube, the first end of the switch tube is electrically connected to the relay component, and the second end of the switch tube is grounded.

5. The power supply box according to claim 4, characterized in that: The switch circuit also includes a first diode, which is electrically connected to the first end of the switch tube and is connected in parallel to the control end of the relay component.

6. The power supply box according to claim 4, characterized in that: The switch circuit further includes a second diode, a cathode of the second diode is connected to the control end of the switch tube, and an anode of the second diode is grounded.

7. The power supply box according to claim 1, characterized in that: The power supply box also includes a power supply circuit, which is used for power supply; the power supply circuit includes at least one of an AC-DC power supply and a POE power supply.

8. The power supply box according to claim 1, characterized in that: The central control interface includes at least one of a Pogopin, a pin header, and a PoE network port.

9. A relay holding circuit, characterized in that: The relay holding circuit includes the power supply box as described in any one of claims 1 to 8 and the intelligent central control, and the intelligent central control can be connected to the power supply box via the central control interface.

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