Relay circuit

Abstract

The utility model provides a relay circuit. The relay circuit comprises a first switch, a resistor module and a relay, the second end of the first switch is connected with the first end of the resistor module, and the first end of the first switch is grounded; the second end of the resistor module is connected with the first end of the relay; the second end of the relay is connected with voltage; wherein the first switch includes a semiconductor device that controls a current. According to the relay circuit, the resistor module is arranged in the relay circuit, under the condition that the relay circuit is powered on, the resistor module can share part of voltage in the circuit so as to reduce the voltage of the relay, then the power consumption of the relay is reduced, and the service life of the relay is prolonged while the requirement for a power source is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of circuit, in particular, to a relay circuit. BACKGROUND

[0002] In the circuit system, the relay as a kind of key electronic components, plays an important role in signal transmission and circuit switching. However, the power consumption problem of the current relay becomes one of the important factors affecting its service life. High power consumption not only leads to the increase of the relay itself heat, but also may trigger a series of chain reactions, such as insulation material aging, contact oxidation aggravation, etc., thereby shortening the service life of the relay. Therefore, reducing the power consumption of the relay has become a problem to be solved in the current circuit field. CONTENT OF THE INVENTION

[0003] Therefore, the purpose of the embodiments of the present application is to provide a relay circuit, which can reduce the power consumption of the relay and prolong the service life of the relay.

[0004] In the first aspect, the embodiments of the present application provide a relay circuit, comprising: a first switch, a resistance module and a relay; the second end of the first switch is connected to the first end of the resistance module, and the first end of the first switch is grounded; the second end of the resistance module is connected to the first end of the relay; the second end of the relay is connected to a voltage; wherein the first switch comprises a semiconductor device for controlling current.

[0005] In the above implementation process, by setting the resistance module in the relay circuit, the resistance module can share part of the voltage in the circuit when the relay circuit is powered on, so as to reduce the voltage of the relay and further reduce the power consumption of the relay. At the same time, the demand for power supply is reduced, and the service life of the relay is prolonged.

[0006] In one embodiment, it further comprises: a first switch control module; the first switch control module is connected to the first end of the first switch.

[0007] In the above implementation process, by setting the first switch control module, the automatic control of the first switch can be realized automatically through the first switch control module, the human intervention can be reduced, the relay circuit control automation can be realized, the control efficiency can be improved, and the working strength of the staff can be reduced.

[0008] In one embodiment, the semiconductor device comprises a first transistor; the first switch control module comprises a first capacitor, a first resistor and a second resistor; the collector of the first transistor is connected to the first end of the resistor module; the base of the first transistor is connected to the first end of the first capacitor, the first end of the first resistor and the second end of the second resistor; the emitter of the first transistor is connected to the second end of the first capacitor and the second end of the first resistor and grounded; the first end of the second resistor is connected to the first signal controller.

[0009] In the above implementation process, by setting the first switch to include the first transistor, the on-off of the first transistor can be controlled based on the power-on condition of the first transistor, improving the flexibility of the first switch control. In addition, by setting the first resistor and the first capacitor, the stability of the operation of the first transistor can be improved through the cooperation of the first resistor and the first capacitor. By setting the second resistor, the second resistor can be used to limit the current flowing through the first transistor, protect the first transistor and prolong the service life of the first transistor.

[0010] In one embodiment, it further comprises a second capacitor; the first end of the second capacitor is connected to the collector of the first transistor; the second end of the second capacitor is connected to the emitter of the first transistor and grounded.

[0011] In the above implementation process, by setting the second capacitor between the collector and the emitter of the first transistor, the second capacitor can function to isolate the direct current signal, avoiding damage to the transistor due to excessive direct current, improving the stability of the first transistor and prolonging the service life of the first transistor.

[0012] In one embodiment, it further comprises a second switch; the second end of the second switch is connected to the first end of the relay, and the first end of the second switch is grounded; wherein the first switch and the second switch are alternately connected to the relay.

[0013] In the above implementation process, by setting the first switch and the second switch in the relay circuit, and connecting the relay through the resistor module by the first switch and directly connecting the relay by the second switch, the working state of the first switch and the second switch can be switched to switch different paths, increasing the application scenarios of the relay circuit.

[0014] In one embodiment, it further comprises a second switch control module; the second switch control module is connected to the first end of the second switch.

[0015] In the implementation process, the second switch control module is arranged, so that the automatic control of the second switch can be realized automatically, human intervention can be reduced, the relay circuit control automation can be realized, the control efficiency is improved, and the working strength of the staff is reduced.

[0016] In one embodiment, the second switch control includes a second triode, and the second switch control module includes a third capacitor, a third resistor and a fourth resistor; the collector of the second triode is connected to the first end of the relay; the base of the second triode is connected to the first end of the third capacitor, the first end of the third resistor and the second end of the fourth resistor; the emitter of the second triode is connected to the second end of the third capacitor and the second end of the third resistor and grounded; and the first end of the fourth resistor is connected to the second signal controller.

[0017] In the implementation process, the second switch includes the second triode, the on-off of the second triode can be controlled based on the power supply condition of the second triode, and the flexibility of the second switch control is improved. In addition, the third capacitor and the third resistor are arranged, and the cooperation of the third resistor and the third capacitor can improve the stability of the operation of the second triode. The fourth resistor is further arranged, which can be used to limit the current flowing through the second triode, protect the second triode, and prolong the service life of the second triode.

[0018] In one embodiment, the fourth capacitor and the voltage stabilizing tube are further arranged; the first end of the fourth capacitor and the first end of the voltage stabilizing tube are connected to the collector of the second triode; and the second end of the fourth capacitor and the second end of the voltage stabilizing tube are connected to the emitter of the second triode and grounded.

[0019] In the implementation process, the fourth capacitor is arranged between the collector and the emitter of the second triode, which can isolate the direct current signal, avoid damage to the second triode due to excessive direct current, improve the stability of the second triode, and prolong the service life of the second triode. In addition, the voltage stabilizing tube is arranged, which can be used to protect the second triode from being damaged by overvoltage, improve the safety of the second triode, and avoid the influence of high voltage on other elements in the circuit, thereby improving the safety of other elements in the circuit.

[0020] In one embodiment, in the case where the first switch is turned on, the second switch is in an off state, and the conduction current flows through the relay and the resistance module; and in the case where the second switch is turned on, the first switch is in an off state, and the conduction current flows through the relay.

[0021] In the implementation process, the first switch and the second switch are arranged in the relay circuit, the first switch is connected with the relay through the resistance module, and the second switch is directly connected with the relay. By switching the working states of the first switch and the second switch, the switching of different paths can be realized, and the application scenarios of the relay circuit are increased.

[0022] In one embodiment, the resistance module includes a plurality of resistors connected in parallel, the first ends of the plurality of resistors are connected with the second end of the first switch, and the second ends of the plurality of resistors are connected with the first end of the relay.

[0023] In the implementation process, the resistance module is arranged in a structure of a plurality of resistors connected in parallel, the adjustment of the resistance module can be realized by adjusting the number or resistance value of the parallel resistors, the adjustment difficulty of the resistance module is reduced, and the application scenarios of the resistance module are increased.

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 The overall structure schematic diagram of the relay circuit provided by the embodiment of the present application includes the first switch;

[0027] Figure 2 The specific structure schematic diagram of the relay circuit provided by the embodiment of the present application;

[0028] Figure 3 The overall structure schematic diagram of the relay circuit provided by the embodiment of the present application includes the first switch and the second switch.

[0029] BRIEF DESCRIPTION OF DRAWINGS: 100-first switch, 200-resistance module, 300-relay, 400-first switch control module, 500-second switch, 600-second switch control module, Q1-first triode, C1-first capacitor, R1-first resistor, R2-second resistor, C2-second capacitor, Q2-second triode, C3-third capacitor, R3-third resistor, R4-fourth resistor, C4-fourth capacitor, D1-voltage stabilizing tube, D01-first signal controller, D02-second signal controller. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0032] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Meanwhile, in the description of the present application, the terms "first", "second" and the like are only used for differentiation, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the application product is used, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be interpreted as a limitation of the present application.

[0034] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connect" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] The relay is an automatic switching element with isolation function, the relay is an automatic switching element with isolation function, it has the induction mechanism that can react the excitation of the outside world, the execution mechanism that realizes "on", "off" control to the controlled circuit, and the intermediate comparison mechanism that can complete comparison, judgment and conversion function to the size of excitation, mainly plays the role of control, protection, regulation and information transmission.

[0036] With the development of switching power supply and relay control technology, the single power density is continuously improved, the capacitor capacity is continuously improved, the load output ability is strengthened, and the relay circuit used in cooperation with the pre-charge circuit in the vehicle power supply is also generated.

[0037] The relay circuit generates current, magnetic field through the relay coil, and realizes the functions of automatic adjustment, safety protection, conversion circuit, etc. in various high load control circuits. However, the inventors of the present application found through long-term research that in the application scene of closed space or long time work, the coil of the relay has a high temperature, which causes the power at both ends of the coil to exceed the rated power, not only affecting the service life of the relay, but also reducing the reliability of the relay circuit.

[0038] Therefore, the present application provides a relay circuit, which can share part of the voltage in the circuit by setting a resistance module in the relay circuit, so as to reduce the voltage of the relay, thereby reducing the power consumption of the relay, reducing the demand for power supply, and prolonging the service life of the relay.

[0039] As shown in FIG. 1, it is a schematic diagram of a relay circuit provided by an embodiment of the present application, which comprises a first switch 100, a resistance module 200 and a relay 300. Figure 1

[0040] Among them, the second end of the first switch 100 is connected to the first end of the resistance module 200, and the first end of the first switch 100 is grounded; the second end of the resistance module 200 is connected to the first end of the relay 300; the second end of the relay 300 is connected to the voltage.

[0041] Optionally, the first switch 100 can be a travel switch, a miniature circuit breaker, a semiconductor and the like, which can be adjusted according to actual conditions.

[0042] In an embodiment, the first switch 100 comprises a semiconductor device for controlling current.

[0043] Optionally, the semiconductor device can include diodes, triodes, thyristors and the like, which can be selected according to actual conditions.

[0044] It can be understood that when the first switch 100 is closed, the relay 300 is powered.

[0045] The above-mentioned resistance module 200 comprises one or more resistors. Among them, when the resistors in the resistance module 200 are multiple, the multiple resistors are connected in series or parallel.

[0046] ​The relay 300 here is an electric control device, which can include a coil, contacts, electromagnets and other elements. In the case of power supply to the relay 300, the coil and other elements may be heated under the influence of temperature and voltage, and the greater the power consumption, the more serious the heating. If the coil and other elements work in high-temperature conditions for a long time, their service life may be affected.

[0047] It should be understood that in the case of power supply to the relay 300, the first switch 100, the resistance module 200 and the relay 300 are in a pass-through state. At this time, since the resistance module 200 and the relay 300 are connected in series, based on the principle of series voltage division, the resistance module 200 and the relay 300 are divided, and the power consumption of the relay 300 can be reduced.

[0048] In the above implementation process, by arranging the resistance module 200 in the relay circuit, the resistance module 200 can share part of the voltage in the circuit to reduce the voltage of the relay 300, thereby reducing the power consumption of the relay 300, reducing the demand for power supply, and prolonging the service life of the relay 300.

[0049] In a possible implementation, the relay circuit further includes a first switch control module 400.

[0050] The first switch control module 400 is connected to the first end of the first switch 100.

[0051] The first switch control module 400 here is used to provide a control current for the first switch 100, and the first switch 100 is configured to be turned on or turned off according to the control current provided by the first switch control module 400.

[0052] Optionally, the first switch control module 400 can be a field effect transistor, a transistor, an analog circuit, a digital circuit, a single-chip microcomputer, etc., which can be selected according to actual conditions.

[0053] It can be understood that the first switch control module 400 provides a corresponding control signal to the first switch 100 according to actual needs, thereby controlling the first switch 100 to be turned on or turned off, and thereby realizing the control of the relay circuit.

[0054] In the above implementation process, by arranging the first switch control module 400, the automatic control of the first switch 100 can be automatically realized by the first switch control module 400, which can reduce human intervention, realize the automation of the relay circuit control, improve the control efficiency, and reduce the working intensity of the staff.

[0055] In a possible implementation, as Figure 2As shown, the semiconductor device includes a first transistor Q1, and the first switch control module 400 includes a first capacitor C1, a first resistor R1 and a second resistor R2.

[0056] The first transistor Q1 is connected to the first end of the resistance module 200, the first end of the first capacitor C1, the first end of the first resistor R1 and the second end of the second resistor R2, and the second end of the first capacitor C1 and the second end of the first resistor R1 are connected to the ground. The first end of the second resistor R2 is connected to the first signal controller D01.

[0057] The first transistor Q1 is a semiconductor transistor, which is a semiconductor device for controlling current.

[0058] The first transistor Q1 is configured to be in an on state when a high voltage is applied to the base of the first transistor Q1 and the potential of the emitter of the first transistor Q1 is lower than the potential of the base of the first transistor Q1. The first transistor Q1 is in an off state when a low voltage is applied to the base of the first transistor Q1 and the potential of the collector of the first transistor Q1 is higher than the potential of the base of the first transistor Q1.

[0059] The first resistor R1 is configured to stabilize and protect the first transistor Q1.

[0060] It can be understood that for the first transistor Q1, temperature changes will affect the characteristics of the first transistor Q1 (such as base-emitter voltage and collector current). By setting the first resistor R1 between the base and the emitter, a stable bias current can be provided through the first resistor R1, thereby reducing temperature-induced changes.

[0061] In addition, by setting the first resistor R1 between the base and the emitter, the first resistor R1 can form a negative feedback, and the voltage drop across the first resistor R1 can compensate for some of the effects of temperature changes, thereby maintaining the stability of the collector current.

[0062] It should be understood that the first transistor Q1 amplifies and outputs the direct current signal. Since the direct current signal may interfere with the operation of the next stage circuit or affect the subsequent electronic components, it is necessary to isolate the direct current signal when outputting. By connecting the first capacitor C1 in parallel between the base and the emitter of the transistor, the direct current signal can be isolated, and only the alternating current signal can be amplified.

[0063] The second resistor R2 is configured to limit the current flowing through the base to prevent excessive current from damaging the transistor and to protect the transistor.

[0064] In the implementation process, by setting the first switch 100 including the first triode Q1, the on-off of the first triode Q1 can be controlled based on the power-on condition of the first triode Q1, and the flexibility of the control of the first switch 100 is improved. In addition, by setting the first resistor R1 and the first capacitor C1, the stability of the operation of the first triode Q1 can be improved through the cooperation of the first resistor R1 and the first capacitor C1. Further, by setting the second resistor R2, the second resistor R2 can be used to limit the current flowing through the first triode Q1, protect the first triode Q1, and prolong the service life of the first triode Q1.

[0065] In a possible implementation, the relay circuit further includes a second capacitor C2.

[0066] The first end of the second capacitor C2 is connected to the collector of the first triode Q1, and the second end of the second capacitor C2 is connected to the emitter of the first triode Q1 and grounded.

[0067] It should be understood that when the first triode Q1 is working, there is a certain voltage difference between the collector and the emitter, so that a certain current flows between them. Because the triode has an amplification effect, these currents may be amplified if not controlled, and even cause the emitter voltage to be too high and burn out the triode. The presence of the second capacitor C2 plays a role in isolating the direct current signal, which allows alternating current signals to pass through, but prevents direct current signals or direct current components from passing through, thereby avoiding the damage to the triode due to excessive direct current.

[0068] In the implementation process, by setting the second capacitor C2 between the collector and the emitter of the first triode Q1, the second capacitor C2 can play a role in isolating the direct current signal, avoiding the damage to the triode due to excessive direct current, improving the stability of the first triode Q1, and prolonging the service life of the first triode Q1.

[0069] In a possible implementation, as shown in Figure 3 The relay circuit further includes a second switch 500.

[0070] The second end of the second switch 500 is connected to the first end of the relay 300, and the first end of the second switch 500 is grounded.

[0071] The first switch 100 and the second switch 500 are alternately connected to the relay 300. The first switch 100 and the second switch 500 can be the same or different. The specific types of the first switch 100 and the second switch 500 can be adjusted according to actual conditions.

[0072] Optionally, the second switch 500 can be a travel switch, a miniature circuit breaker, a semiconductor, or the like. The second switch 500 can be adjusted according to actual conditions.

[0073] In an embodiment, the second switch 500 comprises a semiconductor device for controlling current.

[0074] Optionally, the semiconductor device can comprise a diode, a triode, a thyristor, etc., which can be selected according to actual conditions.

[0075] It can be understood that, when the second switch 500 is closed and the first switch 100 is opened, the second switch 500 and the relay 300 form a path, and the relay 300 is powered through the second switch 500. When the second switch 500 is closed and the first switch 100 is also closed, the second switch 500 and the relay 300 form a path, and the first switch 100, the resistance module 200 and the relay 300 also form a path state, and the relay 300 is powered through the first switch 100 and the second switch 500. When the second switch 500 is opened and the first switch 100 is closed, the first switch 100, the resistance module 200 and the relay 300 form a path state, and the relay 300 is powered through the first switch 100. When the second switch 500 is opened and the first switch 100 is also opened, the relay 300 is powered off.

[0076] In the path state, the first switch 100, the resistance module 200 and the relay 300 are in series connection. At this time, based on the principle of series voltage division, the resistance module 200 and the relay 300 are divided in voltage, and thus the power consumption of the relay 300 can be reduced.

[0077] It should be understood that, in some scenarios, in order to provide the working efficiency of the relay circuit or avoid the influence of resistance heating on the working environment of the relay circuit, it is necessary to avoid connecting the resistance module 200 in the relay circuit. In this case, the first switch 100 can be controlled to be opened, and the second switch 500 can be controlled to be closed, so as to power the relay circuit through the second switch 500.

[0078] In the above implementation process, by arranging the first switch 100 and the second switch 500 in the relay circuit, and connecting the first switch 100 to the relay 300 through the resistance module 200 and directly connecting the second switch 500 to the relay 300, the working states of the first switch 100 and the second switch 500 can be switched to realize the switching of different paths and increase the application scenarios of the relay circuit.

[0079] In a possible implementation, the relay circuit further comprises a second switch control module 600.

[0080] The second switch control module 600 is connected to the first end of the second switch 500.

[0081] The second switch control module 600 is configured to provide a control current for the second switch 500, and the second switch 500 is configured to be turned on or turned off according to the control current provided by the second switch control module 600.

[0082] Optionally, the second switch control module 600 can be a field effect transistor, a transistor, an analog circuit, a digital circuit, a single-chip microcomputer, or the like, which can be selected according to actual conditions.

[0083] It can be understood that the second switch control module 600 provides a corresponding control signal to the second switch 500 according to actual needs, thereby controlling the second switch 500 to be turned on or turned off, and thereby realizing the control of the relay circuit.

[0084] In the above implementation process, by setting the second switch control module 600, the automatic control of the second switch 500 can be automatically realized by the second switch control module 600, the human intervention can be reduced, the automation of the relay circuit control can be realized, the control efficiency can be improved, and the working intensity of the staff can be reduced.

[0085] In a possible implementation, the second switch 500 includes a second transistor Q2, a third capacitor C3, a third resistor R3, and a fourth resistor R4.

[0086] The collector of the second transistor Q2 is connected to the first end of the relay 300; the base of the second transistor Q2 is connected to the first end of the third capacitor C3, the first end of the third resistor R3, and the second end of the fourth resistor R4; the emitter of the second transistor Q2 is connected to the second end of the third capacitor C3 and the second end of the third resistor R3 and grounded; and the first end of the fourth resistor R4 is connected to the second signal controller D02.

[0087] The second transistor Q2 is a kind of semiconductor transistor, and the second transistor Q2 is a kind of semiconductor device for controlling current.

[0088] The second transistor Q2 is configured to be in a conductive state when a high voltage is applied to the base of the second transistor Q2 and the potential of the emitter of the second transistor Q2 is lower than the potential of the base of the second transistor Q2. In the case of applying a low voltage to the base of the second transistor Q2, and the potential of the collector of the second transistor Q2 is higher than the potential of the base of the second transistor Q2, the second transistor Q2 is in a cut-off state.

[0089] The third resistor R3 is configured to stabilize and protect the second transistor Q2.

[0090] It can be understood that, for the second transistor Q2, temperature changes will affect the characteristics (such as base-emitter voltage and collector current) of the second transistor Q2. By arranging the third resistor R3 between the base and the emitter, a stable bias current can be provided through the third resistor R3, thereby reducing temperature-induced changes.

[0091] In addition, by arranging the third resistor R3 between the base and the emitter, the third resistor R3 can form a negative feedback, and the voltage drop across the third resistor R3 can compensate for the effects of some temperature changes, thereby maintaining the stability of the collector current.

[0092] It should be understood that the second transistor Q2 amplifies and outputs the direct current signal. Since the direct current signal can interfere with the operation of the next stage circuit or affect the subsequent electronic components, it is necessary to isolate the direct current signal when outputting. By connecting the third capacitor C3 in parallel between the base and the emitter of the transistor, the direct current signal can be isolated, and only the alternating current signal can be amplified.

[0093] The fourth resistor R4 is configured to limit the current flowing through the base to prevent excessive current from damaging the second transistor Q2, thereby protecting the second transistor Q2.

[0094] In the above implementation process, by arranging the second switch 500 to include the second transistor Q2, the on-off of the second transistor Q2 can be controlled based on the power supply condition of the second transistor Q2, thereby improving the flexibility of the control of the second switch 500. In addition, by arranging the third capacitor C3 and the third resistor R3, the stability of the operation of the second transistor Q2 can be improved through the cooperation of the third resistor R3 and the third capacitor C3. By arranging the fourth resistor R4, the fourth resistor R4 can be used to limit the current flowing through the second transistor Q2, thereby protecting the second transistor Q2 and prolonging the service life of the second transistor Q2.

[0095] In a possible implementation, the relay circuit further includes a fourth capacitor C4 and a voltage stabilizing tube D1.

[0096] The first end of the fourth capacitor C4 and the first end of the voltage stabilizing tube D1 are connected to the collector of the second transistor Q2; the second end of the fourth capacitor C4 and the second end of the voltage stabilizing tube D1 are connected to the emitter of the second transistor Q2 and grounded.

[0097] It should be understood that when the second transistor Q2 is in operation, there is a certain voltage difference between the collector and the emitter, so that a certain current flows between them. Due to the amplification effect of the second transistor Q2, these currents may be amplified if not controlled, even causing the emitter voltage to be too high and burning out the second transistor Q2. The presence of the fourth capacitor C4 plays a role in isolating the direct current signal, allowing alternating current signals to pass through, while preventing the passage of direct current or direct current components, thereby avoiding the damage to the second transistor Q2 due to excessive direct current.

[0098] The above-mentioned voltage stabilizing tube D1 can quickly conduct when the voltage exceeds its rated value, and consume the excess voltage on itself, thereby protecting the second transistor Q2 from overvoltage damage. In addition, the voltage stabilizing tube D1 can ensure that the voltage between the collector and the emitter does not exceed its breakdown voltage, thereby protecting other elements in the circuit from high voltage.

[0099] In the above implementation process, by arranging the fourth capacitor C4 between the collector and the emitter of the second transistor Q2, the fourth capacitor C4 can play a role in isolating the direct current signal, avoiding the damage to the second transistor Q2 due to excessive direct current, improving the stability of the second transistor Q2, and prolonging the service life of the second transistor Q2. In addition, by arranging the voltage stabilizing tube D1, the voltage stabilizing tube D1 can be used to protect the second transistor Q2 from overvoltage damage, improving the safety of the second transistor Q2. At the same time, it can also avoid the influence of high voltage on other elements in the circuit, improving the safety of other elements in the circuit.

[0100] In a possible implementation, when the first switch 100 is turned on, the second switch 500 is in an open state, and the conduction current flows through the relay 300 and the resistance module 200; when the second switch 500 is turned on, the first switch 100 is in an open state, and the conduction current flows through the relay 300.

[0101] It can be understood that when the first switch 100 control module controls the first switch 100 to be in a conductive state, and the second switch 500 control module controls the second switch 500 to be in a cut-off state, the power supply is added to both ends of the coil of the relay 300, and a certain current flows in the coil, thereby generating power consumption mainly loaded to both ends of the coil of the relay 300 and both ends of the resistance module 200. At this time, the relay 300 is in a second working state. When the second switch 500 control module controls the second switch 500 to be closed, the second switch 500 forms a loop with the relay 300 and the power supply, and the current in the coil of the relay 300 passes through, generating power consumption mainly loaded to both ends of the coil of the relay 300. At this time, the relay 300 is in a first working state.

[0102] It should be understood that the power consumed by relay 300 in the second operating state is less than the power consumed in the first operating state.

[0103] In the above implementation, by setting a first switch 100 and a second switch 500 in the relay circuit, with the first switch 100 connected to the relay 300 via a resistor module 200 and the second switch 500 directly connected to the relay 300, the switching of different paths can be achieved by switching the operating states of the first switch 100 and the second switch 500, thus expanding the application scenarios of this relay circuit.

[0104] In one possible implementation, the resistor module 200 includes multiple resistors connected in parallel; the first ends of the multiple resistors are connected to the second ends of the first switch 100, and the second ends of the multiple resistors are connected to the first ends of the relay 300.

[0105] Optionally, the resistors in the resistor module 200 can be the same resistor or different resistors. The resistors in the resistor module 200 can be selected according to the actual situation.

[0106] It should be understood that the resistance value of the resistor module 200 can be adjusted by adjusting the number of resistors connected in parallel in the resistor module 200 or by adjusting the resistance value of the switching resistor module 200 with different resistance values.

[0107] In the above implementation process, by setting the resistor module 200 to a structure of multiple resistors connected in parallel, the resistor module 200 can be adjusted by adjusting the number or resistance value of the parallel resistors, reducing the difficulty of adjusting the resistor module 200 and increasing the application scenarios of the resistor module 200.

[0108] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0109] The above description is merely a specific embodiment of this application, but the scope of protection of this application 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 application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A relay circuit, characterized by comprising: Comprising: a first switch, a resistance module, a second switch and a relay; a second end of the first switch is connected to a first end of the resistance module, a first end of the first switch is grounded; a second end of the resistance module is connected to a first end of the relay; a second end of the relay is connected to a voltage; wherein the first switch comprises a semiconductor device for controlling current; a second end of the second switch is connected to a first end of the relay, a first end of the second switch is grounded; wherein the first switch and the second switch are alternately in communication with the relay the resistance module comprises a plurality of resistors connected in parallel; a first end of the plurality of resistors is connected to a second end of the first switch, a second end of the plurality of resistors is connected to a first end of the relay; wherein the resistance module is configured to adjust the size of the resistors in the resistance module by adjusting the number of resistors connected in parallel in the resistance module or by adjusting the resistance values of the resistors.

2. The relay circuit according to claim 1, characterized by Further comprising: a first switch control module; the first switch control module is connected to a first end of the first switch.

3. The relay circuit according to claim 2, characterized by the semiconductor device comprises a first transistor; the first switch control module comprises a first capacitor, a first resistor and a second resistor; a collector of the first transistor is connected to a first end of the resistance module; a base of the first transistor is connected to a first end of the first capacitor, a first end of the first resistor and a second end of the second resistor; an emitter of the first transistor is connected to a second end of the first capacitor and a second end of the first resistor and grounded; a first end of the second resistor is connected to a first signal controller.

4. The relay circuit according to claim 3, characterized by Further comprising: a second capacitor; a first end of the second capacitor is connected to a collector of the first transistor; a second end of the second capacitor is connected to an emitter of the first transistor and grounded.

5. The relay circuit according to claim 4, characterized in that, Further comprising: a second switch control module; the second switch control module is connected to a first end of the second switch.

6. The relay circuit according to claim 5, characterized by the second switch control comprises a second transistor, the second switch control module comprises a third capacitor, a third resistor and a fourth resistor; a collector of the second transistor is connected to a first end of the relay; a base of the second transistor is connected to a first end of the third capacitor, a first end of the third resistor and a second end of the fourth resistor; an emitter of the second transistor is connected to a second end of the third capacitor and a second end of the third resistor and grounded; a first end of the fourth resistor is connected to a second signal controller.

7. The relay circuit according to claim 6, characterized by Further comprising: a fourth capacitor and a voltage stabilizing tube; a first end of the fourth capacitor and a first end of the voltage stabilizing tube are connected to a collector of the second transistor; a second end of the fourth capacitor and a second end of the voltage stabilizing tube are connected to an emitter of the second transistor and grounded.

8. The relay circuit according to claim 1, wherein: in the case that the first switch is turned on, the second switch is in an off state, and a conduction current flows through the relay and the resistance module; in the case that the second switch is turned on, the first switch is in an off state, and the conduction current flows through the relay.

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