Relay drive module, air conditioner drive circuit, and electrical device

Abstract

A relay drive module, an air conditioner drive circuit, and an electrical device. The relay drive module comprises: a first driving sub-circuit, comprising a first driving terminal and a first preset power supply, wherein the first driving sub-circuit is connected to a control coil of a relay, and is configured to: when the first driving terminal receives a first enable signal, supply the first preset power supply to the control coil, so as to drive contacts of the relay to pull in; and a second driving sub-circuit, comprising a second driving terminal and a second preset power supply, wherein the second driving sub-circuit is connected to the first driving sub-circuit via a clamping sub-circuit, and the second driving sub-circuit is configured to: when the first driving terminal is disconnected and the second driving terminal receives a second enable signal, supply the second preset power supply to the control coil, so as to control the contacts of the relay to remain in a pulled-in state. Two power supplies are used to drive a relay, so that the holding voltage of the relay is less than the pull-in voltage, thereby reducing the driving power consumption of the relay while reducing heat generation of the relay body.

Description

Relay drive modules, air conditioning drive circuits and electrical equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number CN202410052238.2 filed on January 12, 2024, entitled “Relay drive module, air conditioner drive circuit and electrical equipment,” the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0003] The present disclosure relates to the technical field of electrical equipment, and in particular to a relay drive module, an air conditioner drive circuit, and an electrical equipment. Background Art

[0004] The electronic control systems in electrical equipment often use relays to control circuit switching, protection, and other functions. An example is refrigeration equipment. Related technologies use a single-power supply for relay drive control, meaning the relay's pull-in voltage and hold voltage are powered by the same power supply. This results in high relay power consumption and significant heat generation. With the development of high-power-density electronic control systems, low power consumption and heat generation issues have become particularly prominent. Summary of the Invention

[0005] A relay drive module, an air conditioner drive circuit, and an electrical device adopt a dual power supply control method to drive the relay. In this way, the holding voltage of the relay is lower than the pull-in voltage, which reduces the driving power consumption of the relay and the heat generation of the relay body.

[0006] In a first aspect, the present disclosure provides a relay driving module, the driving module comprising: a first driving subcircuit, comprising a first driving end and a first preset power supply, the first driving subcircuit being connected to a control coil of the relay and being configured to supply the first preset power supply to the control coil when the first driving end receives a first enable signal, thereby driving the contacts of the relay to be closed; a second driving subcircuit, comprising a second driving end and a second preset power supply, the second driving subcircuit being connected to the first driving subcircuit via a clamping subcircuit, the second driving subcircuit being configured to supply the second preset power supply to the control coil when the first driving end is disconnected and the second driving end receives a second enable signal, thereby controlling the contacts of the relay to remain in a closed state; wherein the voltage of the first preset power supply is greater than the voltage of the second preset power supply;

[0007] The first driving sub-circuit further includes a first triode unit and a second triode unit, wherein a first end of the first triode unit is connected to the first driving end, a second end of the first triode unit is connected to the first end of the second triode unit, a third end of the first triode unit is grounded, a second end of the second triode unit is connected to the first preset power supply, a third end of the second triode unit is connected to the first end of the control coil, and a second end of the control coil is connected to the third end of the first triode unit and to ground; wherein, when the first driving end receives the first enable signal, the second end and the third end of the first triode unit are conductively connected, and the second end of the first triode unit sends a first control signal to the first end of the second triode unit, thereby conductively connecting the second end and the third end of the second triode unit, thereby connecting the first preset power supply and the control coil;

[0008] The first triode unit includes a first triode, a first resistor, a second resistor, and a first capacitor, wherein the first end of the first resistor serves as the first end of the first triode unit, the second end of the first resistor is connected to the first end of the second resistor, the first end of the second resistor and the first end of the first capacitor are both connected to the base of the first triode, the second end of the second resistor and the second end of the first capacitor are both connected to the emitter of the first triode and grounded, the collector of the first triode serves as the second end of the first triode unit, and the emitter of the first triode serves as the third end of the first triode unit;

[0009] The second triode unit includes: a second triode, a second capacitor, a third resistor, and a fourth resistor, wherein the first end of the third resistor serves as the first end of the second triode unit, the second end of the third resistor is connected to the first end of the fourth resistor, the first end of the second capacitor, and the base of the second triode, respectively; the second end of the fourth resistor is connected to the second end of the second capacitor and the emitter of the second triode, respectively, and serves as the second end of the second triode unit; and the collector of the second triode serves as the third end of the second triode unit;

[0010] The second driving sub-circuit includes a third transistor unit and a fourth transistor unit, wherein a first end of the third transistor unit is connected to the second driving end, a second end of the third transistor unit is connected to the first end of the fourth transistor unit, a third end of the third transistor unit is grounded, a second end of the fourth transistor unit is connected to the second preset power supply, a third end of the fourth transistor unit is connected to the first end of the clamping sub-circuit, and a second end of the clamping sub-circuit is connected to the first end of the control coil; wherein, when the second driving end receives the second enable signal, the second end and the third end of the third transistor unit are conductively connected, and the second end of the third transistor unit sends a second control signal to the first end of the fourth transistor unit, thereby conductively connecting the second end and the third end of the fourth transistor unit, thereby connecting the second preset power supply and the control coil;

[0011] The third triode unit includes a third triode, a third capacitor, a fifth resistor, and a sixth resistor, wherein the first end of the fifth resistor serves as the first end of the third triode unit, the second end of the fifth resistor is connected to the first end of the sixth resistor, the first end of the sixth resistor and the first end of the third capacitor are both connected to the base of the third triode, the second end of the sixth resistor and the second end of the third capacitor are both connected to the emitter of the third triode and grounded, the collector of the third triode serves as the second end of the third triode unit, and the emitter of the third triode serves as the third end of the third triode unit;

[0012] The fourth triode unit includes a fourth triode, a fourth capacitor, a seventh resistor, and an eighth resistor, wherein the first end of the seventh resistor serves as the first end of the fourth triode unit, the second end of the seventh resistor is connected to the first end of the eighth resistor, the first end of the fourth capacitor, and the base of the fourth triode, respectively; the second end of the eighth resistor is connected to the second end of the fourth capacitor and the emitter of the fourth triode, respectively, and serves as the second end of the fourth triode unit; and the collector of the fourth triode serves as the third end of the fourth triode unit;

[0013] The clamping sub-circuit includes a first diode and a second diode, wherein the anode of the first diode serves as the first end of the clamping sub-circuit, the cathode of the first diode is connected to the anode of the second diode, the cathode of the second diode serves as the third end of the clamping sub-circuit and is connected to the first preset power supply, and the anode of the second diode serves as the second end of the clamping sub-circuit. The clamping sub-circuit is specifically configured to control the power supply to the control coil according to the conduction conditions of the fourth transistor and the conduction conditions of the second transistor;

[0014] When the second transistor is turned on and the fourth transistor is turned off, the clamping sub-circuit uses the first preset power supply to supply power to the control coil, so that the contacts of the relay are attracted; when the second transistor is turned on and the fourth transistor is turned on, the clamping sub-circuit uses the first preset power supply to supply power to the control coil, so that the contacts of the relay remain in an attracted state; when the second transistor is turned off and the fourth transistor is turned on, the clamping sub-circuit uses the second preset power supply to supply power to the control coil, so that the contacts of the relay remain in an attracted state;

[0015] The driving module further includes a freewheeling diode, wherein an anode of the freewheeling diode is connected to the second end of the control coil, and a cathode of the freewheeling diode is connected to the second end of the clamping sub-circuit.

[0016] According to the driving module of the relay of the embodiment of the present disclosure, it includes a first driving subcircuit and a second driving subcircuit. The first driving subcircuit includes a first driving end and a first preset power supply, and the second driving subcircuit includes a second driving end and a second preset power supply. The first driving subcircuit is connected to the control coil of the relay. When the first driving end receives a first enable signal, the first preset power supply is provided to the control coil to drive the contacts of the relay to be attracted. The second driving subcircuit is connected to the first driving subcircuit through a clamping subcircuit. When the first driving end is disconnected and the second driving end receives a second enable signal, the second preset power supply is provided to the control coil to control the contacts of the relay to remain in an attracted state. The present disclosure adopts a dual power supply to drive the relay, uses a higher voltage to drive the contacts of the relay to be attracted, and then uses a smaller voltage to keep the contacts of the relay attracted, that is, the holding voltage of the relay is less than the attraction voltage, which reduces the driving power consumption of the relay and reduces the heat generation of the relay body.

[0017] In a second aspect, the present disclosure provides an electrical device, including a relay and a driving module of the relay.

[0018] According to the electrical equipment of the embodiment of the present disclosure, a dual power supply is adopted to drive the relay through the above-mentioned relay driving module, using a higher voltage to drive the relay contacts to close, and then using a smaller voltage to keep the relay contacts closed, that is, the holding voltage of the relay is less than the closing voltage, which reduces the driving power consumption of the relay and reduces the heat generation of the relay body.

[0019] Additional aspects and advantages of the present disclosure will be given in part in the description that follows and, in part, will be obvious from the description that follows, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] FIG1 is a schematic structural diagram of a relay driving module according to an embodiment of the present disclosure;

[0022] FIG2 is a schematic diagram of a topological structure of a relay according to an embodiment of the present disclosure;

[0023] FIG3 is a schematic diagram of a driving sub-circuit according to an embodiment of the present disclosure;

[0024] FIG4 is a circuit diagram of a driving module of a relay according to an embodiment of the present disclosure;

[0025] FIG5 is a logic diagram of a relay closing instruction according to an embodiment of the present disclosure;

[0026] FIG6 is a schematic diagram of an air conditioner driving circuit according to an embodiment of the present disclosure;

[0027] FIG7 is a schematic diagram of an air conditioner driving circuit according to another embodiment of the present disclosure;

[0028] FIG8 is a schematic diagram of an electrical device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0029] Embodiments of the present disclosure will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present disclosure will be described in detail below.

[0030] The relay driving module, air conditioner driving circuit and electrical equipment of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0031] FIG1 is a schematic structural diagram of a relay driving module according to an embodiment of the present disclosure.

[0032] In one embodiment of the present disclosure, as shown in FIG1 , a relay driving module 100 includes:

[0033] A first driver subcircuit 10 includes a first driver terminal and a first preset power supply. The first driver subcircuit 10 is connected to the control coil of the relay 200 and is configured to provide the first preset power supply to the control coil when the first driver terminal receives a first enable signal, thereby driving the contacts of the relay 200 to be attracted.

[0034] The second driver sub-circuit 20 includes a second driver end and a second preset power supply. The second driver sub-circuit 20 is connected to the first driver sub-circuit 10 through the clamping sub-circuit 30. The second driver sub-circuit 20 is configured to provide the second preset power supply to the control coil when the first driver end is disconnected and the second driver end receives a second enable signal, so as to control the contacts of the relay 200 to remain in the attracted state; wherein the voltage of the first preset power supply is greater than the voltage of the second preset power supply.

[0035] Specifically, relays are used in electronic control systems to implement functions such as switching and protection of control circuits. The driving module of traditional relays is driven by a single power supply, that is, a power supply is provided to drive the contacts in the relay to be attracted, and after the contacts of the relay are attracted, the power supply continues to be used to power the relay, so that the contacts of the relay remain in the attracted state. However, in fact, the voltage required to trigger the relay contacts to be attracted is greater than the voltage to keep the relay contacts in the attracted state. For the convenience of subsequent explanations, the voltage required to trigger the relay contacts to be attracted is referred to as the attraction voltage, and the voltage to keep the relay contacts in the attracted state is referred to as the holding voltage. If the attraction voltage and the holding voltage use the same power supply, this will cause the relay to consume more power and generate more serious heat. The present disclosure proposes a driving module for a relay, which uses a dual power supply to power the relay, that is, the attraction voltage and the holding voltage use two power supplies, which reduces the power consumption of the relay.

[0036] More specifically, the relay drive module 100 includes a first drive subcircuit 10 and a second drive subcircuit 20. The first drive subcircuit 10 includes a first drive end and a first preset power supply. When the first drive end receives a first enable signal, the first drive subcircuit 10 provides the first preset power supply to the relay 200. The relay 200 includes a control coil. When the control coil receives sufficient voltage, it can control the contacts of the relay to be closed, which is equivalent to the conduction function when the relay acts as a switch. The first drive subcircuit 10 provides the first preset power supply to the control coil in the relay 200 to cause the contacts of the relay 200 to be closed. It should be noted that the first preset power supply must meet the contact voltage of the relay.

[0037] More specifically, the second driving sub-circuit 20 includes a first driving end and a first preset power supply. When the second driving end receives a second enable signal, the second driving sub-circuit 20 provides the second preset power supply to the relay 200. However, the second driving sub-circuit 20 and the first driving sub-circuit 10 are further provided with a clamping sub-circuit 30. Because the voltage of the second preset power supply is lower than the voltage of the first preset power supply, when both the first driving end and the second driving end receive the enable signal, the clamping sub-circuit 30 provides the first preset power supply to the relay 200. Only when the first driving end is disconnected and the second driving end receives the second enable signal, the second driving sub-circuit 20 supplies the second preset power supply to the control coil of the relay 200 through the clamping sub-circuit 30 to keep the contacts of the relay 200 in the attracted state.

[0038] It should be noted that the voltage of the first preset power supply is greater than the voltage of the second preset power supply. The function of the first preset power supply is to drive the contacts of relay 200 to close, so the voltage of the first preset power supply must meet the closing voltage of relay 200. The function of the second preset power supply is to keep the contacts of relay 200 in the closed state, so the voltage of the second preset power supply must meet the holding voltage of relay 200 and cannot exceed the closing voltage. As shown in the relay structure example in Figure 2, the first preset power supply is the closing power supply A, and the second preset power supply is the holding power supply B. The control side of the relay can be grounded, as shown in the example of the grounded control terminal of the relay in Figure 2. The control side of the relay can also share a power supply, or an isolated power supply, etc. Because the voltage of the second preset power supply does not exceed the pull-in voltage of the relay 200, the contacts of the relay 200 cannot be pulled in by relying solely on the second preset power supply to power the relay 200. Therefore, the complete steps for driving the relay 200 to open are: first, a first enable signal is sent to enable the first drive sub-circuit 10 to provide the first preset power supply to the control coil of the relay 200 to pull in the contacts of the relay 200, and then a second enable signal is sent to turn on the second drive sub-circuit 20, but at this time the control coil of the relay 200 is still powered by the first preset power supply, and then the first drive end is closed. At this time, the second drive sub-circuit 20 provides the second preset power supply to the control coil of the relay 200 to keep the contacts of the relay 200 in the pulled-in state.

[0039] In one embodiment of the present disclosure, as shown in Figure 3, the first driving sub-circuit 10 also includes a first triode unit 1 and a second triode unit 2, the first end of the first triode unit 1 is connected to the first driving end, the second end of the first triode unit 1 is connected to the first end of the second triode unit 2, the third end of the first triode unit 1 is grounded, the second end of the second triode unit 2 is connected to the first preset power supply, the third end of the second triode unit 2 is connected to the first end of the control coil, and the second end of the control coil is connected to the third end of the first triode unit 1 and grounded; wherein, when the first driving end receives the first enable signal, the second end of the first triode unit 1 is connected to the third end, and the second end of the first triode unit 1 sends a first control signal to the first end of the second triode unit 2, so that the second end of the second triode unit 2 is connected to the third end, and the first preset power supply and the control coil are connected.

[0040] Specifically, the first driving sub-circuit 10 includes a first triode unit 1 and a second triode unit 2. The first triode unit is connected to the first driving end, which is used to input a first enable signal. The second end of the first triode unit 1 is connected to the first end of the second triode unit 2. The third end of the first triode unit 1 is grounded with the second end of the relay 200. When the first triode unit 1 receives the first enable signal, the second and third ends of the first triode unit 1 are connected, and the second end of the first triode unit 1 sends a first control signal to the first end of the second triode unit 2. The second end of the second triode unit 2 is connected to the first preset power supply, and the third end of the second triode unit 2 is connected to the first end of the relay 200. When the first end of the second triode unit 2 receives the first control signal sent by the first triode unit 1, the second and third ends of the second triode unit 2 are connected, and the first preset power supply is provided to the relay 200. Under the drive of the first preset power supply, the contacts of the control coil of the relay 200 are attracted.

[0041] More specifically, the driving logic of the first driving sub-circuit 10 is as follows: when the first end of the first triode unit 1 receives the first enable signal, the second end and the third end of the first triode unit 1 are turned on, and the first triode unit 1 sends the first control signal to the second triode unit 2. When the second triode unit 2 receives the first control signal, the second end and the third end of the second triode unit 2 are turned on, and the first preset power supply is provided to the control coil of the relay 200, so that the contacts of the relay 200 are attracted.

[0042] In one embodiment of the present disclosure, as shown in Figure 4, the first triode unit 1 includes a first triode Q1, a first resistor R1, a second resistor R2 and a first capacitor C1. The first end of the first resistor R1 serves as the first end of the first triode unit 1, the second end of the first resistor R1 is connected to the first end of the second resistor R2, the first end of the second resistor R2 and the first end of the first capacitor C1 are both connected to the base of the first triode Q1, the second end of the second resistor R2 and the second end of the first capacitor C1 are both connected to the emitter of the first triode Q1 and grounded, the collector of the first triode Q1 serves as the second end of the first triode unit 1, and the emitter of the first triode Q1 serves as the third end of the first triode unit 1.

[0043] Specifically, a specific circuit example diagram of the first transistor unit 1 is shown in Figure 4. The first resistor R1 is connected in series between the first driving end and the base of the first transistor Q1. The first resistor R1 serves as the base resistor of the first transistor Q1 and has a current limiting function. The first end of the second resistor R2 is connected to the second end of the first resistor R1, and the second end of the second resistor R2 is grounded with the second end of the relay 200. The second resistor R2 is an anti-interference resistor, so that the first transistor Q1 can be reliably turned off in the non-enabled state. The first capacitor C1 is connected in parallel across the second resistor R2 and has a filtering function to ensure filtering of the base signal of the first transistor Q1. When the first driving end receives the first enable signal, the first enable signal is driven to turn on the first transistor Q1 through the first resistor R1. After the first transistor Q1 is turned on, the collector of the first transistor sends a first control signal to the second transistor unit 2.

[0044] In one embodiment of the present disclosure, as shown in Figure 4, the second triode unit 2 includes: a second triode Q2, a second capacitor C2, a third resistor R3 and a fourth resistor R4, the first end of the third resistor R3 serves as the first end of the second triode unit 2, the second end of the third resistor R3 is connected to the first end of the fourth resistor R4, the first end of the second capacitor C2, and the base of the second triode Q2, respectively, the second end of the fourth resistor R4 is connected to the second end of the second capacitor C2 and the emitter of the second triode Q2, and serves as the second end of the second triode unit 2, and the collector of the second triode Q2 serves as the third end of the second triode unit 2.

[0045] Specifically, a specific circuit diagram of the second transistor unit 2 is shown in Figure 4. A third resistor R3 is connected in series between the collector of the first transistor Q1 and the base of the second transistor Q2. The third resistor R3 serves as the base resistor of the second transistor Q2, limiting its current. One end of a fourth resistor R4 is connected to the second end of the third resistor R3, and the other end of the fourth resistor is connected to the first preset power supply. The fourth resistor R4 serves as an anti-interference resistor for the second transistor Q2. A second capacitor C2 is connected in parallel across the fourth resistor R4. The second capacitor C2 is a filter capacitor used to filter the base signal of the second transistor Q2. The second end of the second capacitor C2, the second end of the fourth resistor R4, and the emitter of the second transistor are all connected to the first preset power supply. The collector of the second transistor Q2 is connected to the first end of the relay 200. When the second transistor unit 2 receives the first control signal, the second transistor Q2 turns on, and the first preset power supply supplies power to the control coil of the relay 200 through the second transistor Q2, causing the contacts of the relay 200 to close.

[0046] When the first driving end receives the first enable signal, the first transistor Q1 is turned on, and the first transistor Q1 drives the second transistor Q2 to be turned on. The first preset power supply is applied to the relay 200 through the second transistor Q2. Under the action of the first preset power supply, the control coil in the relay 200 triggers the contacts to be attracted.

[0047] Similarly, the second driving sub-circuit 20 is also divided into two transistor units, namely the third transistor unit 3 and the fourth transistor unit 4. The difference is that the fourth transistor unit 4 does not directly provide the preset power supply to the relay 200. A clamping sub-circuit 30 is also connected between the fourth transistor unit 4 and the relay 200.

[0048] In one embodiment of the present disclosure, as shown in FIG3 , the second driving sub-circuit 20 includes a third triode unit 3 and a fourth triode unit 4, wherein a first end of the third triode unit 3 is connected to the second driving end, a second end of the third triode unit 3 is connected to a first end of the fourth triode unit 4, a third end of the third triode unit 3 is grounded, a second end of the fourth triode unit 4 is connected to a second preset power supply, a third end of the fourth triode unit 4 is connected to a first end of the clamping sub-circuit 30, and a second end of the clamping sub-circuit 20 is connected to a first end of the control coil; wherein, when the second driving end receives a second enable signal, the second end of the third triode unit 3 is conductively connected to the third end, and the second end of the third triode unit 3 sends a second control signal to the first end of the fourth triode unit 4, so that the second end of the fourth triode unit 4 is conductively connected to the third end, thereby connecting the second preset power supply and the control coil.

[0049] Specifically, the second driving sub-circuit 20 includes a third transistor unit 3 and a fourth transistor unit 4. The third transistor unit 3 is connected to the second driving end, and the second driving end is used to input the second enable signal. The second end of the third transistor unit 3 is connected to the first end of the fourth transistor unit 4. The third end of the third transistor unit 3 is grounded with the second end of the relay 200. When the third transistor unit 3 receives the second enable signal, the second and third ends of the third transistor unit 3 are conductive, and the second end of the third transistor unit 3 sends a second control signal to the first end of the fourth transistor unit 4. The second end of the fourth transistor unit 4 is connected to the second preset power supply, and the third end of the fourth transistor unit 4 is connected to the first end of the clamping sub-circuit 30. When the first end of the fourth transistor unit 4 receives the second control signal sent by the third transistor unit 3, the second and third ends of the fourth transistor unit 4 are conductive, and the second preset power supply is provided to the relay 200 through the clamping sub-circuit 30. Under the action of the second preset power supply, the control coil of the relay 200 keeps the contacts attracted.

[0050] More specifically, the driving logic of the second driving sub-circuit 20 is as follows: when the first end of the third triode unit 3 receives the second enable signal, the second end and the third end of the third triode unit 3 are turned on, and the third triode unit 3 sends the second control signal to the fourth triode unit 4. When the fourth triode unit 4 receives the second control signal, the second end and the third end of the fourth triode unit 4 are turned on, and the second preset power supply is provided to the control coil of the relay 200 through the clamping sub-circuit 30, so that the contacts of the relay 200 remain in the attracted state.

[0051] It should be noted that the premise for the four transistor units 4 to provide the second preset power supply to the control coil of the relay 200 through the clamping sub-circuit 30 is that the clamping sub-circuit 30 is turned on, and the conduction status of the clamping sub-circuit 30 is determined according to the conduction status of the second transistor unit 2 and the conduction status of the fourth transistor unit 4.

[0052] In one embodiment of the present disclosure, as shown in Figure 4, the third triode unit 3 includes a third triode Q3, a third capacitor C3, a fifth resistor R5 and a sixth resistor R6. The first end of the fifth resistor R5 serves as the first end of the third triode unit 3, the second end of the fifth resistor R5 is connected to the first end of the sixth resistor R6, the first end of the sixth resistor R6 and the first end of the third capacitor C3 are both connected to the base of the third triode Q3, the second end of the sixth resistor R6 and the second end of the third capacitor C3 are both connected to the emitter of the third triode Q3 and grounded, the collector of the third triode Q3 serves as the second end of the third triode unit 3, and the emitter of the third triode Q3 serves as the third end of the third triode unit 3.

[0053] Specifically, a specific circuit diagram of the third transistor unit 1 is shown in Figure 4. The fifth resistor R5 is connected in series between the second driving end and the base of the third transistor Q3. The fifth resistor R5 serves as the base resistor of the third transistor Q3 and performs a current limiting function. The first end of the sixth resistor R6 is connected to the second end of the fifth resistor R5. The second end of the sixth resistor R6 is grounded with the second end of the relay 200. The sixth resistor R6 is an anti-interference resistor, which enables the third transistor Q3 to be reliably turned off in the non-enabled state. The third capacitor C3 is connected in parallel across the sixth resistor R6 and performs a filtering function to ensure filtering of the base signal of the third transistor Q3. When the second driving end receives the second enable signal, the second enable signal is driven to turn on the third transistor Q3 through the fifth resistor R5. After the third transistor Q3 is turned on, the collector of the third transistor Q3 sends a second control signal to the fourth transistor unit 4.

[0054] In one embodiment of the present disclosure, as shown in Figure 4, the fourth triode unit 4 includes a fourth triode Q4, a fourth capacitor C4, a seventh resistor R7 and an eighth resistor R8. The first end of the seventh resistor R7 serves as the first end of the fourth triode unit 4, the second end of the seventh resistor R7 is connected to the first end of the eighth resistor R8, the first end of the fourth capacitor C4, and the base of the fourth triode Q4, respectively. The second end of the eighth resistor R8 is connected to the second end of the fourth capacitor C4 and the emitter of the fourth triode Q4, respectively, and serves as the second end of the fourth triode unit 4. The collector of the fourth triode Q4 serves as the third end of the fourth triode unit 4.

[0055] Specifically, a specific circuit diagram of the fourth transistor unit 4 is shown in FIG4 . A seventh resistor R7 is connected in series between the collector of the third transistor Q3 and the base of the fourth transistor Q4. The seventh resistor R7 serves as the base resistor of the fourth transistor Q4 and provides current limiting. One end of an eighth resistor R8 is connected to the second end of the seventh resistor R7, and the other end of the eighth resistor R8 is connected to the second preset power supply. The eighth resistor R8 serves as an anti-interference resistor for the fourth transistor Q4. A fourth capacitor C4 is connected in parallel across the eighth resistor R8. The fourth capacitor C4 is a filter capacitor used to filter the base signal of the fourth transistor Q4. The second end of the fourth capacitor C4, the second end of the eighth resistor R8, and the emitter of the fourth transistor Q4 are all connected to the second preset power supply. The collector of the fourth transistor Q4 is connected to the first end of the clamping sub-circuit 30. When the fourth transistor unit 4 receives the second control signal, the fourth transistor Q4 is turned on, and the second preset power supply is transmitted to the clamping sub-circuit 30 through the fourth transistor Q4. When the clamping sub-circuit 30 is turned on, the second preset power supply supplies power to the relay 200 to keep the contacts of the relay 200 in the attracted state.

[0056] When the second driving end receives the second enable signal, the third transistor Q3 turns on, which in turn drives the fourth transistor Q4 to turn on. The second preset power supply is applied to the clamping sub-circuit 30 via the fourth transistor Q4. When the clamping sub-circuit 30 turns on, the second preset power supply powers the relay 200, keeping the contacts of the relay 200 in the closed state. The conduction status of the clamping sub-circuit 30 is determined based on the conduction status of the second transistor unit 2 and the conduction status of the fourth transistor unit 4.

[0057] In one embodiment of the present disclosure, as shown in FIG4 , the clamping sub-circuit 30 includes a first diode D1 and a second diode D2. The anode of the first diode D1 serves as a first end of the clamping sub-circuit 30. The cathode of the first diode D1 is connected to the anode of the second diode D2. The cathode of the second diode D2 serves as a third end of the clamping sub-circuit 30 and is connected to a first preset power supply. The anode of the second diode D2 serves as a second end of the clamping sub-circuit 30. The clamping sub-circuit 30 is specifically configured to control the power supply of the control coil according to the conduction conditions of the fourth transistor Q4 and the conduction conditions of the second transistor Q2.

[0058] Specifically, the clamping sub-circuit 30 comprises two diodes: a first diode D1 and a second diode D2. The anode of the first diode D1 is connected to the collector of the fourth transistor Q4, the cathode of the first diode D1 is connected to the anode of the second diode D2, and the cathode of the second diode D2 is connected to the first preset power source. The anode of the second diode D2, which is also the cathode of the first diode D1, is connected to the first terminal of the relay 200. The clamping sub-circuit 30 controls the power supply to the control coil based on the conduction conditions of the fourth transistor Q4 and the second transistor Q2. The voltage of the first preset power source is greater than the voltage of the second preset power source. If the voltage loss when the transistors are turned on is negligible, when both the first and second driving terminals receive an enable signal, the cathode voltage of the first diode D1 is equal to the voltage of the first preset power source, and the anode voltage of the first diode D1 is equal to the voltage of the second preset power source. The diode conducts only when the anode voltage of the diode is greater than the cathode voltage. Therefore, when both the first and second driving terminals receive an enable signal, the first preset power source powers the relay 200.

[0059] In one embodiment of the present disclosure, when the second transistor Q2 is turned on and the fourth transistor Q4 is turned off, the clamping sub-circuit 30 uses the first preset power supply to power the control coil so that the contacts of the relay 200 are attracted; when the second transistor Q2 is turned on and the fourth transistor Q4 is turned on, the clamping sub-circuit 30 uses the first preset power supply to power the control coil so that the contacts of the relay 200 remain in the attracted state; when the second transistor Q2 is turned off and the fourth transistor Q4 is turned on, the clamping sub-circuit 30 uses the second preset power supply to power the control coil so that the contacts of the relay 200 remain in the attracted state.

[0060] Specifically, the voltage of the first preset power supply is greater than the voltage of the second preset power supply. The function of the first preset power supply is to drive the contacts of the relay 200 to be attracted, and the function of the second preset power supply is to keep the contacts of the relay 200 in the attracted state. Because the voltage of the second preset power supply does not exceed the attraction voltage of the relay 200, it is impossible to make the contacts of the relay 200 attracted by only relying on the second preset power supply to power the relay 200. Therefore, the complete steps of driving the relay 200 to open are: first send a first enable signal to enable the first drive sub-circuit 10 to provide the first preset power supply to the control coil of the relay 200 to make the contacts of the relay 200 attracted, and then send a second enable signal to turn on the second drive sub-circuit 20, but at this time the control coil of the relay 200 is still powered by the first preset power supply, and then close the first drive end. At this time, the second drive sub-circuit 20 provides the second preset power supply to the control coil of the relay 200 to keep the contacts of the relay 200 in the attracted state.

[0061] More specifically, as shown in FIG5 , the logic example for issuing a relay closing instruction is as follows: first, a first enable signal is issued, the first transistor Q3 and the second transistor Q2 are turned on, and the first preset power supply is supplied to the control coil of the relay 200, i.e., the closing power supply A is valid. The control coil of the relay 200 is closed under the action of the first preset power supply. Then, a second enable signal is issued to turn on the second drive sub-circuit 20. At this time, the third transistor Q3 and the fourth transistor Q4 are turned on, keeping the power supply B valid. However, due to the action of the first diode D1, the second preset power supply cannot pass through the first diode D1. The control coil of the relay 200 is still powered by the first preset power supply, so that the contacts of the relay 200 remain in the closed state. Finally, the signal from the first drive end is disconnected. At this time, the first transistor Q3 and the second transistor Q2 are turned off, and the third transistor Q3 and the fourth transistor Q4 are turned on. The second preset power supply can pass through the first diode D1 and is powered by the second preset power supply to the control coil of the relay 200, so that the contacts of the relay 200 remain in the closed state. In this way, the voltage that the relay bears when its contacts are triggered is different from the voltage that it bears when the contacts are kept closed, which reduces the driving power consumption of the relay and reduces the heat generation of the relay body.

[0062] In one embodiment of the present disclosure, as shown in FIG4 , the driving module 100 further includes a freewheeling diode D3 , the anode of the freewheeling diode D3 is connected to the second end of the control coil, and the cathode of the freewheeling diode D3 is connected to the second end of the clamping sub-circuit 30 .

[0063] Specifically, the present disclosure also sets a freewheeling diode D3 at both ends of the relay 200, the anode of the freewheeling diode D3 is connected to the second end of the control coil and the cathode of the freewheeling diode D3 is connected to the second end of the clamping sub-circuit 30 for freewheeling.

[0064] The driving module of the relay of the embodiment of the present disclosure includes a first driving subcircuit and a second driving subcircuit. The first driving subcircuit includes a first driving end and a first preset power supply, and the second driving subcircuit includes a second driving end and a second preset power supply. The first driving subcircuit is connected to the control coil of the relay. When the first driving end receives a first enable signal, the first preset power supply is provided to the control coil to drive the contacts of the relay to be attracted. The second driving subcircuit is connected to the first driving subcircuit through a clamping subcircuit. When the first driving end is disconnected and the second driving end receives a second enable signal, the second preset power supply is provided to the control coil to control the contacts of the relay to remain in an attracted state. The present disclosure adopts a dual power supply to drive the relay, uses a higher voltage to drive the contacts of the relay to be attracted, and then uses a smaller voltage to keep the contacts of the relay attracted, that is, the holding voltage of the relay is less than the attraction voltage, which reduces the driving power consumption of the relay and reduces the heat generation of the relay body.

[0065] The present disclosure also provides an air conditioner driving circuit.

[0066] In one embodiment of the present disclosure, as shown in Figure 6, the air conditioner driving circuit includes a rectifier module 601, a relay 602, an inductor module 603, a capacitor module 604 and an inverter module 605, the first end of the rectifier module 601 is connected to the first end of the relay 602, the second end of the relay 602 is connected to the first end of the inductor module 603, the second end of the inductor module 603 is respectively connected to the first end of the capacitor module 604 and the first end of the inverter module 605, the second end of the inverter module 605 is connected to the second end of the capacitor module and the second end of the rectifier module 601, wherein the driving end of the relay 602 is connected according to the driving module of the above-mentioned relay.

[0067] The present disclosure also provides an air conditioner driving circuit.

[0068] In one embodiment of the present disclosure, as shown in FIG7 , an air conditioner driving circuit includes a three-phase power supply 701, a first relay 702, a second relay 703, a three-phase rectifier module 704, an inductor module 705, a capacitor module 706, and an inverter module 707. Each phase of the three-phase rectifier module 704 includes a first diode and a second diode connected in series.

[0069] The first phase of the three-phase power supply 701 is connected to the first end of the first relay, the second end of the first relay 702 is connected to the midpoint between the first diode and the second diode of the first phase, the second phase of the three-phase power supply 701 is connected to the first end of the second relay 703, the second end of the second relay 703 is connected to the midpoint between the first diode and the second diode of the second phase, the third phase of the three-phase power supply 701 is connected to the midpoint between the first diode and the second diode of the third phase, the cathode of the first diode is connected to the first end of the inductor module 705 as the first end of the three-phase rectifier module 704, the second end of the inductor module 705 is respectively connected to the first end of the capacitor module 706 and the first end of the inverter module 707, the anode of the second diode is connected to the second end of the inverter module 707 and the second end of the capacitor module 706 as the second end of the three-phase rectifier module 704, wherein the driving ends of the first relay 702 and the second relay 703 are connected according to the driving module of the above-mentioned relays.

[0070] The present disclosure also provides an electrical device 1000 .

[0071] In one embodiment of the present disclosure, as shown in FIG8 , an electrical device 1000 includes a relay 200 and the aforementioned relay driving module 100 .

[0072] The electrical equipment of the embodiment of the present disclosure adopts a dual power supply to drive the relay through the above-mentioned relay driving module, using a higher voltage to drive the relay contacts to close, and then using a smaller voltage to keep the relay contacts closed, that is, the holding voltage of the relay is lower than the closing voltage, which reduces the driving power consumption of the relay and reduces the heat generation of the relay body.

[0073] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0074] Although the embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A relay driving module, characterized in that The driving module includes: A first driving sub-circuit, including a first driving terminal and a first preset power supply. The first driving sub-circuit is connected to the control coil of the relay and is configured to supply the first preset power supply to the control coil when a first enabling signal is received at the first driving terminal, so as to drive the contacts of the relay to close; A second driving sub-circuit, including a second driving terminal and a second preset power supply. The second driving sub-circuit is connected to the first driving sub-circuit through a clamping sub-circuit. The second driving sub-circuit is configured to supply the second preset power supply to the control coil when the first driving terminal is disconnected and a second enabling signal is received at the second driving terminal, so as to control the contacts of the relay to maintain the closed state; Wherein, the voltage of the first preset power supply is greater than the voltage of the second preset power supply.

2. The relay driving module according to claim 1, wherein The first driving sub-circuit further includes a first triode unit and a second triode unit. The first end of the first triode unit is connected to the first driving terminal, the second end of the first triode unit is connected to the first end of the second triode unit, the third end of the first triode unit is grounded, the second end of the second triode unit is connected to the first preset power supply, the third end of the second triode unit is connected to the first end of the control coil, and the second end of the control coil is connected to the third end of the first triode unit and grounded; Wherein, when the first enabling signal is received at the first driving terminal, the second end and the third end of the first triode unit are turned on, and a first control signal is sent from the second end of the first triode unit to the first end of the second triode unit, so that the second end and the third end of the second triode unit are turned on, and the first preset power supply and the control coil are connected.

3. The relay driving module according to claim 2, wherein The first triode unit includes a first triode, a first resistor, a second resistor and a first capacitor. The first end of the first resistor serves as the first end of the first triode unit. The second end of the first resistor is connected to the first end of the second resistor. The first end of the second resistor and the first end of the first capacitor are both connected to the base of the first triode. The second end of the second resistor and the second end of the first capacitor are both connected to the emitter of the first triode and grounded. The collector of the first triode serves as the second end of the first triode unit, and the emitter of the first triode serves as the third end of the first triode unit.

4. The relay driving module according to claim 3, wherein The second triode unit includes: a second triode, a second capacitor, a third resistor and a fourth resistor. The first end of the third resistor serves as the first end of the second triode unit. The second end of the third resistor is respectively connected to the first end of the fourth resistor, the first end of the second capacitor and the base of the second triode. The second end of the fourth resistor is respectively connected to the second end of the second capacitor and the emitter of the second triode and serves as the second end of the second triode unit. The collector of the second triode serves as the third end of the second triode unit.

5. The relay driving module according to claim 1, characterized in that The second driving sub-circuit includes a third triode unit and a fourth triode unit. The first end of the third triode unit is connected to the second driving end. The second end of the third triode unit is connected to the first end of the fourth triode unit. The third end of the third triode unit is grounded. The second end of the fourth triode unit is connected to the second preset power supply. The third end of the fourth triode unit is connected to the first end of the clamping sub-circuit. The second end of the clamping sub-circuit is connected to the first end of the control coil; Wherein, when the second driving end receives the second enabling signal, the second end and the third end of the third triode unit are turned on, and the second end of the third triode unit sends a second control signal to the first end of the fourth triode unit, causing the second end and the third end of the fourth triode unit to be turned on, and connecting the second preset power supply and the control coil.

6. The relay driving module according to claim 5, characterized in that The third triode unit includes a third triode, a third capacitor, a fifth resistor and a sixth resistor. The first end of the fifth resistor serves as the first end of the third triode unit. The second end of the fifth resistor is connected to the first end of the sixth resistor. The first end of the sixth resistor and the first end of the third capacitor are both connected to the base of the third triode. The second end of the sixth resistor and the second end of the third capacitor are both connected to the emitter of the third triode and grounded. The collector of the third triode serves as the second end of the third triode unit. The emitter of the third triode serves as the third end of the third triode unit.

7. The relay driving module according to claim 6, wherein The fourth triode unit includes a fourth triode, a fourth capacitor, a seventh resistor and an eighth resistor. The first end of the seventh resistor serves as the first end of the fourth triode unit. The second end of the seventh resistor is connected to the first end of the eighth resistor, the first end of the fourth capacitor and the base of the fourth triode respectively. The second end of the eighth resistor is connected to the second end of the fourth capacitor and the emitter of the fourth triode respectively, and serves as the second end of the fourth triode unit. The collector of the fourth triode serves as the third end of the fourth triode unit.

8. The relay driving module according to claim 7, characterized in that The clamping sub-circuit includes a first diode and a second diode. The anode of the first diode serves as the first end of the clamping sub-circuit. The cathode of the first diode is connected to the anode of the second diode. The cathode of the second diode serves as the third end of the clamping sub-circuit and is connected to the first preset power supply. The anode of the second diode serves as the second end of the clamping sub-circuit. The clamping sub-circuit is specifically configured to: control the power supply situation of the control coil according to the conduction situation of the fourth triode and the conduction situation of the second triode.

9. The relay driving module according to claim 8, wherein when the second triode is turned on and the fourth triode is turned off, the clamping sub-circuit supplies power to the control coil by using the first preset power supply, so that the contacts of the relay are attracted; When the second triode is turned on and the fourth triode is turned on, the clamping sub-circuit supplies power to the control coil by using the first preset power supply so that the contact of the relay remains in the closed state; When the second triode is turned off and the fourth triode is turned on, the clamping sub-circuit supplies power to the control coil by using the second preset power supply so that the contact of the relay remains in the closed state.

10. The relay driving module according to claim 8, wherein The drive module further includes a freewheeling diode. The anode of the freewheeling diode is connected to the second end of the control coil, and the cathode of the freewheeling diode is connected to the second end of the clamping sub-circuit.

11. An air conditioner drive circuit, characterized in that, The air conditioner drive circuit includes a rectification module, a relay, an inductance module, a capacitance module, and an inversion module. The first end of the rectification module is connected to the first end of the relay. The second end of the relay is connected to the first end of the inductance module. The second end of the inductance module is respectively connected to the first end of the capacitance module and the first end of the inversion module. The second end of the inversion module is connected to the second end of the capacitance module and the second end of the rectification module. Among them, the drive end of the relay is connected to the relay drive module according to any one of claims 1-10.

12. An air conditioner drive circuit, characterized in that, The air conditioner drive circuit includes a three-phase power supply, a first relay, a second relay, a three-phase rectification module, an inductance module, a capacitance module, and an inversion module. Each phase of the three-phase rectification module includes a first diode and a second diode connected in series. The first phase of the three-phase power supply is connected to the first end of the first relay. The second end of the first relay is connected to the midpoint between the first diode and the second diode of the first phase. The second phase of the three-phase power supply is connected to the first end of the second relay. The second end of the second relay is connected to the midpoint between the first diode and the second diode of the second phase. The third phase of the three-phase power supply is connected to the midpoint between the first diode and the second diode of the third phase. The cathode of the first diode serves as the first end of the three-phase rectification module and is connected to the first end of the inductance module. The second end of the inductance module is respectively connected to the first end of the capacitance module and the first end of the inversion module. The anode of the second diode serves as the second end of the three-phase rectification module and is respectively connected to the second end of the inversion module and the second end of the capacitance module. Among them, the drive ends of the first relay and the second relay are connected to the relay drive module according to any one of claims 1-10.

13. An electrical device, characterized in that, It includes a relay and the relay drive module according to any one of claims 1-10.

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