Driving circuit, driving circuit protection method, refrigeration equipment and frequency conversion refrigerator

Abstract

The invention relates to a driving circuit, a driving circuit protection method, refrigeration equipment and an inverter refrigerator, and the driving circuit is characterized in that a first input pin of a controller is connected with a first resistor and then connected with a base of a first triode, a collector of the first triode is connected with a second resistor and then connected with a base of a second triode, and an emitter of the first triode is connected with a power supply; a collector of the second triode is connected with one end of a switching device, an emitter of the second triode is grounded, the other end of the switching device is connected with a collector of a third triode, an emitter of the third triode is connected with a power supply, a base of the third triode is connected with one end of a third resistor, and the other end of the third resistor is connected with a collector of a fourth triode; the emitter of the fourth triode is grounded, the base of the fourth triode is connected with one end of a fourth resistor, and the other end of the fourth resistor is connected with the second input pin of the controller. Through the driving circuit, the safety performance and the protection effect of the driving circuit are improved.

Description

Technical Field

[0001] This application relates to the field of drive circuits, and in particular to drive circuits, drive circuit protection methods, refrigeration equipment, and variable frequency refrigerators. Background Technology

[0002] With the advancement of science and technology, we are encountering more and more electronic products in our lives, which greatly enriches and facilitates people's lives. However, due to the aging of components in electronic products and malfunctions caused by improper human operation, other components in electronic products may overheat and be damaged, or even cause fires, posing significant safety hazards.

[0003] Load operation typically requires a drive circuit. However, if a component in the drive circuit fails or short-circuits, and the drive circuit continues to operate, it can easily lead to damage to other undamaged components and the load itself. The traditional solution is to connect an identical component in series or parallel to the easily damaged component. While this allows the other component to continue functioning normally even if one fails, the risk of both components failing or short-circuiting remains, thus failing to provide effective protection and offering limited safety.

[0004] There is currently no effective solution to the problem of low safety performance and weak protection of the drive circuit in related technologies. Summary of the Invention

[0005] This embodiment provides a drive circuit, a drive circuit protection method, a refrigeration device, and a variable frequency refrigerator to solve the problems of low safety performance and weak protection of drive circuits in related technologies.

[0006] In the first aspect, this embodiment provides a driving circuit, including: a controller first input pin, a controller second input pin, a first resistor, a second resistor, a third resistor, a fourth resistor, a first transistor, a second transistor, a third transistor, a fourth transistor, and a switching device; the controller first input pin and the controller second input pin correspond one-to-one;

[0007] In this configuration, the controller's first input pin is connected to one end of a first resistor, the other end of the first resistor is connected to the base of a first transistor, the collector of the first transistor is connected to one end of a second resistor, the emitter of the first transistor is connected to a power supply, the other end of the second resistor is connected to the base of a second transistor, the collector of the second transistor is connected to one end of a switching device, the emitter of the second transistor is grounded, the other end of the switching device is connected to the collector of a third transistor, the emitter of the third transistor is connected to a power supply, the base of the third transistor is connected to one end of a third resistor, the other end of the third resistor is connected to the collector of a fourth transistor, the emitter of the fourth transistor is grounded, the base of the fourth transistor is connected to one end of a fourth resistor, and the other end of the fourth resistor is connected to the controller's second input pin.

[0008] In some of these embodiments, the first input pin of the controller is either the first input pin of the defrost heater or the first input pin of the compressor; the second input pin of the controller is either the second input pin of the defrost heater or the second input pin of the compressor.

[0009] Secondly, this embodiment provides a driving circuit, including: a first driving module, a sixth resistor, a seventh resistor, a sixth transistor, a seventh transistor, a diode, a control module, an eighth resistor, and a second driving module; the first driving module and the second driving module correspond one-to-one.

[0010] The first driving module is connected to one end of the sixth resistor, the other end of the sixth resistor is connected to the base of the sixth transistor, the emitter of the sixth transistor is grounded, the collector of the sixth transistor is connected to the positive terminal of the diode, the negative terminal of the diode is connected to one end of the seventh resistor, the control module is connected in parallel with the diode, the other end of the seventh resistor is connected to the collector of the seventh transistor, the emitter of the seventh transistor is connected to the power supply, the base of the seventh transistor is connected to one end of the eighth resistor, the other end of the eighth resistor is connected to the power supply, and the other end of the eighth resistor is connected to the second driving module.

[0011] Thirdly, this embodiment provides a driving circuit protection method, applied to the driving circuit described in the first or second aspect above, comprising:

[0012] When the second transistor fails, the second input pin of the controller converts the high-level signal to a low-level signal, and the first input pin of the controller converts the low-level signal to a high-level signal, so that the third transistor is turned off, thereby turning off the switching device, disconnecting the drive circuit, and stopping the power device from running.

[0013] In some of these embodiments, when the second resistor is short-circuited to the power supply, the second input pin of the controller converts the low-level signal into a high-level signal to turn on the switching device, connect the drive circuit, and control the operation of the power device.

[0014] Alternatively, the second input pin of the controller can be converted from a high-level signal to a low-level signal to turn off the switching device, disconnect the drive circuit, and stop the power device from operating.

[0015] In some of these embodiments, when all devices are operating normally, the controller's first input pin and second input pin switch from low to high to turn on the switching device, connect the drive circuit, and control the power device to operate.

[0016] In some embodiments, when the two first input pins of the controller are short-circuited, the second input pins corresponding to the two first input pins of the controller will switch from high level to low level, so that the switching device in the drive circuit where the two first input pins of the controller are located will be turned on, the two drive circuits will be disconnected, and the power device on the control drive circuit will stop running.

[0017] Fourthly, this embodiment provides a refrigeration device, including the drive circuit described in the first aspect, and applying the drive circuit protection method described in the third aspect.

[0018] Fifthly, in this embodiment, the variable frequency refrigerator includes the drive circuit described in the first aspect above, and applies the drive circuit protection method described in the third aspect above.

[0019] In a sixth aspect, this embodiment provides a storage medium storing a computer program that, when executed by a processor, implements the drive circuit protection method described in the third aspect above.

[0020] Compared with related technologies, the driving circuit provided in this embodiment includes: a controller first input pin, a controller second input pin, a first resistor, a second resistor, a third resistor, a fourth resistor, a first transistor, a second transistor, a third transistor, a fourth transistor, and a switching device; the controller first input pin and the controller second input pin correspond one-to-one; wherein, the controller first input pin is connected to one end of the first resistor, the other end of the first resistor is connected to the base of the first transistor, the collector of the first transistor is connected to one end of the second resistor, the emitter of the first transistor is connected to the power supply, the other end of the second resistor is connected to the base of the second transistor, the collector of the second transistor is connected to one end of the switching device, the emitter of the second transistor is grounded, the other end of the switching device is connected to the collector of the third transistor, the emitter of the third transistor is connected to the power supply, the base of the third transistor is connected to one end of the third resistor, the other end of the third resistor is connected to the collector of the fourth transistor, the emitter of the fourth transistor is grounded, the base of the fourth transistor is connected to one end of the fourth resistor, and the other end of the fourth resistor is connected to the controller second input pin. This driving circuit improves the safety performance and protection of the driving circuit.

[0021] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is a diagram of the drive circuit control circuit in the existing technology.

[0024] Figure 2 This is a diagram showing the layout of the drive circuit control pins on the MCU of the main control board in the existing technology.

[0025] Figure 3 This is the driving circuit diagram of this embodiment.

[0026] Figure 4 This is a circuit diagram of the defrost heater or compressor drive circuit in this embodiment.

[0027] Figure 5 This is the anti-condensation heating drive circuit diagram of this embodiment.

[0028] Figure 6 This is another anti-condensation heating drive circuit diagram in this embodiment.

[0029] Figure 7 This is a hardware structure block diagram of the terminal of the driving circuit protection method in this embodiment. Detailed Implementation

[0030] To better understand the purpose, technical solution, and advantages of this application, the application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0031] Unless otherwise defined, the technical or scientific terms used in this application shall have the general meaning as understood by one of ordinary skill in the art to which this application pertains. Words such as “a,” “an,” “an,” “the,” “the,” and “these,” used in this application, do not indicate quantitative limitation and may be singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or modules (units) is not limited to the listed steps or modules (units) but may include steps or modules (units) not listed, or may include other steps or modules (units) inherent to such processes, methods, products, or devices. The terms “connected,” “linked,” and “coupled,” used in this application, are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. The term “multiple” used in this application refers to two or more. The "and / or" operator describes the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: A alone, A and B simultaneously, and B alone. Typically, the character " / " indicates that the objects before and after it are in an "or" relationship. The terms "first," "second," and "third," etc., used in this application are merely for distinguishing similar objects and do not represent a specific ordering of the objects.

[0032] Figure 1 This is a circuit diagram of a drive circuit in the existing technology. As shown in the figure, the existing drive circuit uses one control pin and one transistor to control the drive circuit. Taking the drive circuit containing the defrost heater as an example, the following faults can cause the drive circuit to malfunction:

[0033] Fault a: When transistor Q5 in the drive circuit is short-circuited, the drive circuit will always be conductive and will not be controlled by the MCU on the main control board. This will cause the defrost heater controlled by the drive circuit to be in a continuous heating state. In mild cases, this will cause the air duct around the defrost heater to deform and affect the refrigerator's cooling performance. In severe cases, the continuous operation of the defrost heater will cause the plastic parts of the heater around the defrost heater to catch fire, and eventually the refrigerator will catch fire.

[0034] Fault b: The lower circuit node of resistor R5 is short-circuited to the +5V power supply, and transistor Q5 will also be continuously conducting. The main control board MCU cannot turn off the defrost heater, which causes the defrost heater controlled by the drive circuit to be in a continuous heating state. At best, this will cause the air duct around the defrost heater to deform and affect the refrigerator's cooling performance. At worst, the continuous operation of the defrost heater will cause the plastic parts of the heater around the defrost heater to catch fire, and eventually cause the refrigerator to catch fire.

[0035] Fault C: Figure 2This is a diagram showing the layout of the drive circuit control pins on the MCU of the main control board in existing technology, such as... Figure 2 As shown, the control pins for the anti-condensation heater, defrost heater, and compressor are all arranged side-by-side. When the anti-condensation heater is on but the defrost heater is not, due to the parallel arrangement of the pins, if the anti-condensation heater is on, a misoperation or a short circuit between two pins may accidentally activate the adjacent defrost heater, causing the defrost heater controlled by the drive circuit to remain in a heating state, resulting in the same problem mentioned above. Similarly, if the compressor pin is on, a misoperation or a short circuit between two pins may accidentally activate the adjacent defrost heater, causing the defrost heater controlled by the drive circuit to remain in a heating state, resulting in the same problem mentioned above.

[0036] Fault d: When pin bc of Q5 is short-circuited, the +12V voltage of relay K1 coil flows back through resistor R5 to... Figure 2 If the MCU controls the defrost heater pins, it can cause minor damage to the MCU's control pins, or even damage the MCU itself, rendering the refrigerator completely unable to cool.

[0037] To address these issues, this embodiment provides a driving circuit. Figure 3 This is the driving circuit diagram of this embodiment, as shown below. Figure 3 As shown, the driving circuit includes:

[0038] The controller includes a first input pin 31, a second input pin 32, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first transistor Q1, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, and a switching device 33; the first input pin 31 and the second input pin 32 correspond one-to-one.

[0039] In this configuration, the controller's first input pin 31 is connected to one end of a first resistor R1. The other end of the first resistor R1 is connected to the base (b) of a first transistor Q1. The other end of the first resistor R1 is also connected to one end of another resistor R, the other end of which is connected to a 5V power supply. The collector (c) of the first transistor Q1 is connected to one end of a second resistor R2. The emitter (e) of the first transistor Q1 is also connected to a 5V power supply. The other end of the second resistor R2 is connected to the base (b) of a second transistor Q2. The collector (c) of the second transistor Q2 is connected to one end of a switching device 33. The emitter (e) of the second transistor Q2 is grounded. The other end of the second resistor R2 is also connected to one end of another resistor R, the other end of which is grounded. The other end of switching device 33 is connected to the collector c of the third transistor Q3; the emitter e of the third transistor Q3 is connected to a 12V power supply; the base b of the third transistor Q3 is connected to one end of the third resistor R3; the other end of the third resistor R3 is connected to the collector c of the fourth transistor Q4; the other end of the third resistor R3 is also connected to one end of a resistor R, the other end of which is connected to a 12V power supply; the emitter e of the fourth transistor Q4 is grounded; the base b of the fourth transistor Q4 is connected to one end of the fourth resistor R4; the other end of the fourth resistor R4 is connected to the second input pin 32 of the controller; the other end of the fourth resistor R4 is also connected to one end of a resistor R, the other end of which is grounded. The first transistor Q1 and the third transistor Q3 are PNP transistors, and the second transistor Q2 and the fourth transistor Q4 are NPN transistors.

[0040] Specifically, in the drive circuit of this embodiment, two transistors are configured after each input pin is connected. When a short circuit occurs between the ce and e pins of the second transistor Q2, and the control logic requires the defrosting heater to be turned off, the second input pin 32 of the controller changes from high to low, and the first input pin 31 of the controller changes from low to high. Because the third transistor Q3 is turned off, the switching device controlling the defrosting heater is de-energized, thereby controlling the defrosting heater to turn off. Similarly, when other transistors are short-circuited, the defrosting heater can be turned off by controlling the controller input pin at the other end. This solves the problem of fault a in the prior art, where a single pin cannot turn off the defrosting heater when a transistor is short-circuited.

[0041] In another embodiment, even if this single fault exists, when the lower circuit node of the second resistor R2 is short-circuited to the +5V power supply, when the control logic requires the defrosting heater to operate, the second input pin 32 of the controller changes from low to high, turning on the switching device 33 that controls the defrosting heater, thereby energizing the defrosting heater. Simultaneously, when the control logic requires the defrosting heater to be de-energized, the second input pin 32 of the controller changes from high to low, turning off the switching device 33 that controls the defrosting heater, thereby de-energizing the defrosting heater, thus solving the problem of fault b in the prior art.

[0042] In one embodiment, the two ends of the drive circuit are respectively provided with two input pins of the controller. In a drive circuit, the input pins of the two controllers correspond one-to-one. The operation of the drive circuit is controlled by the two input pins of the controller. The drive circuit can only operate when both input pins receive a ON signal. For example, in the defrost heater drive circuit, there are a first control pin and a second control pin for the defrost heater. The drive circuit can only operate normally when both pins of the defrost heater receive a drive signal. With the two input pins of this embodiment, even if the pins of other power devices are short-circuited with the pins of power devices that do not need to be turned on, since the drive circuit of each power device requires two input pins to be ON simultaneously to operate, the other input pin of the drive circuit of the power device that does not need to be turned on is not ON. Therefore, the drive circuit of the power device that does not need to be turned on will not be started, thereby solving the problem of fault c in the prior art and preventing false start-up caused by a single pin short circuit.

[0043] In another embodiment, when the bc terminal of the second transistor Q2 is short-circuited, since a first transistor Q1 is also provided between the first pin 31 of the controller and the base of Q2, the +12V voltage connected to the switching device can be prevented from flowing back to the first pin 31 of the controller by controlling the disconnection of the first transistor Q1, thereby preventing damage to the first pin 31 of the controller and the refrigerator. This solves the problem of fault d in the prior art.

[0044] In another embodiment, the first input pin of the controller is either the first input pin of the defrost heater or the first input pin of the compressor; the second input pin of the controller is either the second input pin of the defrost heater or the second input pin of the compressor.

[0045] Specifically, the drive circuits in the above embodiments are applicable to defrosting heaters and compressors, and their respective drive circuits are controlled through different input pins. Figure 4 This is a circuit diagram of the defrost heater or compressor drive in this embodiment, such as... Figure 4 As shown, in Figure 3 Based on this, the switching device 33 adopts a relay K4. The compressor drive circuit includes: a first input pin 31 of the defrost heater or compressor, a first resistor R1, a resistor R, a first transistor Q1, a second resistor R2, a resistor R, a second transistor Q2, a diode D4, a relay K4, a third transistor Q3, a resistor R, a third resistor R3, a fourth transistor Q4, a resistor R, a fourth resistor R4, and a second input pin 32 of the defrost heater or compressor.

[0046] like Figure 4As shown, the first input pin 31 of the defrosting heater or compressor is connected to one end of the first resistor R1, and the other end of the first resistor R1 is connected to the base b of the first transistor Q1. The other end of the first resistor R1 is also connected to one end of another resistor R, the other end of which is connected to a 5V power supply. The collector c of the first transistor Q1 is connected to one end of the second resistor R2, and the emitter e of the first transistor Q1 is connected to a 5V power supply. The other end of the second resistor R2 is connected to the base b of the second transistor Q2, and the other end of the second resistor R2 is also connected to one end of another resistor R, the other end of which is grounded. The collector c of the second transistor Q2 is connected to the positive terminal of the diode D4, and the collector c of the second transistor Q2 is also connected to the first terminal 41 of the relay K4. The second terminal 42 of the relay K4 is connected to a relay switch, and one end of the relay switch is connected to the neutral wire of the AC power supply. The other end of the relay switch is connected to the live wire of the AC power supply. The negative terminal of diode D4 is connected to the third terminal 43 of relay K4. The third terminal 43 of relay K4 is connected to the collector c of the third transistor Q3. The emitter e of the second transistor Q2 is grounded. The emitter e of the third transistor Q3 is connected to a 12V power supply. The base b of the third transistor Q3 is connected to one end of the third resistor R3. The base b of the third transistor Q3 is also connected to one end of a resistor R. The other end of the resistor R is connected to a 12V power supply. The other end of the third resistor R3 is connected to the collector c of the fourth transistor Q4. The emitter e of the fourth transistor Q4 is grounded. The base b of the fourth transistor Q4 is connected to one end of the fourth resistor R4. The base b of the fourth transistor Q4 is also connected to one end of a resistor R. The other end of the resistor R is grounded. The other end of the fourth resistor R4 is connected to the second input pin 32 of the defrost heater or compressor. The first transistor Q1 and the third transistor Q3 are PNP transistors, while the second transistor Q2 and the fourth transistor Q4 are NPN transistors.

[0047] When the power is off, relay K4 has an induced voltage. Diode D4 allows the induced voltage to discharge through the coil to form a current loop, thus preventing the induced voltage from breaking down the collector of the second transistor Q2.

[0048] This embodiment also provides another driving circuit, including: a first driving module, a sixth resistor, a seventh resistor, a sixth transistor, a diode, a control module, an eighth resistor, and a second driving module; the first driving module and the second driving module correspond one-to-one.

[0049] The first driving module is connected to one end of the sixth resistor, the other end of the sixth resistor is connected to the base of the sixth transistor, the emitter of the sixth transistor is grounded, the collector of the sixth transistor is connected to the positive terminal of the diode, the negative terminal of the diode is connected to one end of the seventh resistor, the control module is connected in parallel with the diode, the other end of the seventh resistor is connected to the collector of the seventh transistor, the emitter of the seventh transistor is connected to the power supply, the base of the seventh transistor is connected to one end of the eighth resistor, the other end of the eighth resistor is connected to the power supply, and the other end of the eighth resistor is connected to the second driving module.

[0050] Specifically, Figure 5 This is the anti-condensation heating drive circuit diagram of this embodiment, as shown below. Figure 5 As shown, the anti-condensation heating drive circuit includes: anti-condensation first input pin 51, sixth resistor R6, resistor R, sixth transistor Q6, diode D5, optocoupler U2, seventh resistor R7, seventh transistor Q7, resistor R, eighth resistor R8, and anti-condensation second input pin 52.

[0051] like Figure 5 As shown, the first input pin 51 of the anti-condensation device is connected to one end of the sixth resistor R6. The other end of the sixth resistor R6 is connected to one end of resistor R, and the other end of resistor R is grounded. The other end of the sixth resistor R6 is also connected to the base b of the sixth transistor Q6. The emitter e of the sixth transistor Q6 is grounded. The collector c of the sixth transistor Q6 is connected to the positive terminal of diode D5. The collector c of the sixth transistor Q6 is also connected to the negative terminal of optocoupler U2. Optocoupler U2 is connected in parallel with diode D5. The negative terminal of diode D5 is connected to the positive terminal of optocoupler U2. The negative terminal of diode D5 is also connected to one end of the seventh resistor R7. The other end of the seventh resistor R7 is connected to the collector c of the seventh transistor Q7. The emitter e of the seventh transistor Q7 is connected to a 5V power supply. The base b of the seventh transistor Q7 is connected to one end of resistor R, and the other end of resistor R is connected to a 5V power supply. The base b of the seventh transistor Q7 is also connected to one end of the eighth resistor R8. The other end of the eighth resistor R8 is connected to the second input pin 52 of the anti-condensation device. Among them, the optocoupler U2 includes a light-emitting diode D6, a bidirectional thyristor TR1, and a varistor ZR2. Its control method is the same as that of the defrost heater drive circuit, and will not be described in detail here.

[0052] In some of these embodiments, Figure 6 This is another anti-condensation heating drive circuit diagram in this embodiment, such as... Figure 6 As shown, in Figure 5 Based on this, the optocoupler U2 includes a light-emitting diode D6, a bidirectional thyristor TR1, a resistor R9, a varistor ZR2, and a bidirectional thyristor TR2. The bidirectional thyristor TR1, resistor R9, varistor ZR2, and bidirectional thyristor TR2 are connected in series, and one end of the bidirectional thyristor TR2 is also connected to one end of resistor R9 and varistor ZR2.

[0053] This embodiment provides a drive circuit protection method. The following are methods for controlling the drive circuit for different faults.

[0054] like Figure 4 As shown, when the second transistor fails, the second input pin of the controller converts the high-level signal to a low-level signal, and the first input pin of the controller converts the low-level signal to a high-level signal, so that the third transistor is turned off, thereby turning off the switching device, disconnecting the drive circuit, and stopping the power device from running.

[0055] Specifically, when a short circuit occurs between the ce and e pins of the second transistor Q2, and the control logic requires the defrosting heater to be turned off, the second input pin 32 of the controller changes from high level to low level, and the first input pin 31 of the controller changes from low level to high level. Because the third transistor Q3 is turned off, the relay coil K4 controlling the defrosting heater is de-energized, the relay K4 contacts open, disconnecting the live wire of the defrosting heater from the mains power, thereby controlling the defrosting heater to turn off and stop heating.

[0056] When the second resistor is short-circuited with the power supply, the second input pin of the controller will convert the low-level signal into a high-level signal to turn on the switching device, connect the drive circuit, and control the operation of the power device.

[0057] Alternatively, the second input pin of the controller can be converted from a high-level signal to a low-level signal to turn off the switching device, disconnect the drive circuit, and stop the power device from operating.

[0058] Specifically, when the lower circuit node of the second resistor R2 is short-circuited to the +5V power supply, even with this single fault, when the control logic requires the defrosting heater to operate, the controller's second input pin 32 changes from low to high, turning on the relay K4 controlling the defrosting heater and thus energizing it. When the control logic requires the defrosting heater to be de-energized, the controller's second input pin 32 changes from high to low, turning off the relay K4 controlling the defrosting heater and thus de-energizing it, thereby stopping the defrosting heater from heating.

[0059] When all devices are operating normally, the first input pin and the second input pin of the controller will switch from low level to high level to turn on the switching device, connect the drive circuit, and control the operation of the power device.

[0060] Specifically, the two ends of the drive circuit are each equipped with two input pins of the controller. In a single drive circuit, the input pins of the two controllers correspond one-to-one. The operation of the drive circuit is controlled by the two input pins of the controller. The drive circuit can only operate when both input pins receive a ON signal. For example, in a defrost heater drive circuit, there are a first control pin and a second control pin for the defrost heater. The drive circuit can only operate normally when both pins of the defrost heater receive a drive signal.

[0061] When the two first input pins of the controller are short-circuited, the second input pins corresponding to the two first input pins of the controller will switch from high level to low level, so that the switching device in the drive circuit where the two first input pins of the controller are located will be turned on, the two drive circuits will be disconnected, and the power device on the control drive circuit will stop running.

[0062] Specifically, the two ends of the drive circuit are respectively equipped with two input pins of the controller. In one drive circuit, the input pins of the two controllers correspond one-to-one. The operation of the drive circuit is controlled by the two input pins of the controller. When the first input pin of the two drive circuits is short-circuited, the operation of the malfunctioning drive circuit can be prevented by controlling the second input pin on the drive circuit to be disconnected. With the two input pins configured in this embodiment, even if the pin of other power devices is short-circuited with the pin of a power device that does not need to be turned on, since each drive circuit of a power device requires two input pins to be connected simultaneously to operate, the other input pin of the drive circuit of the power device that does not need to be turned on is not connected at this time. Therefore, the drive circuit of the power device that does not need to be turned on will not be started.

[0063] This embodiment also provides a refrigeration device, which is provided with the driving circuit described in any of the above embodiments. The driving circuit drives the power devices in the refrigeration device. The refrigeration device also applies the driving circuit protection method described in any of the above embodiments to control the driving circuit.

[0064] This embodiment also provides a variable frequency refrigerator, which is provided with the drive circuit described in any of the above embodiments. The drive circuit drives the power devices in the refrigeration equipment. The refrigeration equipment also applies the drive circuit protection method described in any of the above embodiments to control the drive circuit.

[0065] It should be noted that the specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementations, and will not be repeated in this embodiment.

[0066] The method embodiments provided in this example can be executed on a terminal, computer, or similar computing device. For example, it can run on a terminal. Figure 7 This is a hardware structure block diagram of the terminal of the drive circuit protection method in this embodiment. For example... Figure 7 As shown, a terminal may include one or more ( Figure 7 Only one is shown in the diagram. A processor 702 and a memory 704 for storing data are also included. The processor 702 may be, but is not limited to, a microprocessor (MCU) or a programmable logic device (FPGA). The terminal may also include a transmission device 706 for communication functions and an input / output device 708. Those skilled in the art will understand that... Figure 7 The structure shown is for illustrative purposes only and does not limit the structure of the terminal described above. For example, the terminal may also include components that are larger than... Figure 7 The more or fewer components shown, or having the same Figure 7 The different configurations shown are illustrated.

[0067] The memory 704 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the drive circuit protection method in this embodiment. The processor 702 executes various functional applications and data processing by running the computer program stored in the memory 704, thereby implementing the aforementioned method. The memory 704 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 704 may further include memory remotely located relative to the processor 702, and these remote memories can be connected to the terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0068] Transmission device 706 is used to receive or send data via a network. This network includes a wireless network provided by the terminal's communication provider. In one example, transmission device 706 includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, transmission device 706 can be a Radio Frequency (RF) module used for wireless communication with the Internet.

[0069] Furthermore, in conjunction with the drive circuit protection methods provided in the above embodiments, this embodiment can also provide a storage medium for implementation. The storage medium stores a computer program; when executed by a processor, the computer program implements any of the drive circuit protection methods described in the above embodiments.

[0070] It should be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. All other embodiments derived by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0071] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0072] Obviously, the accompanying drawings are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar situations based on these drawings without any creative effort. Furthermore, it is understood that although the work done in this development process may be complex and lengthy, for those skilled in the art, certain design, manufacturing, or production modifications made based on the technical content disclosed in this application are merely conventional technical means and should not be considered as insufficient disclosure of this application.

[0073] The term "embodiment" in this application refers to a specific feature, structure, or characteristic described in connection with an embodiment that may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily imply the same embodiment, nor does it imply that it is mutually exclusive with or independent of other embodiments. It will be clearly or implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0074] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0075] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of patent protection. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the appended claims.

Claims

1. A driving circuit, characterized in that, include: The controller includes a first input pin, a second input pin, a first resistor, a second resistor, a third resistor, a fourth resistor, a first transistor, a second transistor, a third transistor, a fourth transistor, and a switching device; the first input pin and the second input pin correspond one-to-one. In this configuration, the first input pin of the controller is connected to one end of the first resistor, the other end of the first resistor is connected to the base of the first transistor, the collector of the first transistor is connected to one end of the second resistor, the emitter of the first transistor is connected to the power supply, the other end of the second resistor is connected to the base of the second transistor, the collector of the second transistor is connected to one end of the switching device, the emitter of the second transistor is grounded, the other end of the switching device is connected to the collector of the third transistor, the emitter of the third transistor is connected to the power supply, the base of the third transistor is connected to one end of the third resistor, the other end of the third resistor is connected to the collector of the fourth transistor, the emitter of the fourth transistor is grounded, the base of the fourth transistor is connected to one end of the fourth resistor, and the other end of the fourth resistor is connected to the second input pin of the controller.

2. The driving circuit according to claim 1, characterized in that, The first input pin of the controller is either the first input pin of the defrost heater or the first input pin of the compressor; the second input pin of the controller is either the second input pin of the defrost heater or the second input pin of the compressor.

3. A driving circuit, characterized in that, include: First drive module, sixth resistor, seventh resistor, sixth transistor, seventh transistor, diode, control module, eighth resistor and second drive module; The first driving module and the second driving module correspond one-to-one; In this configuration, the first driving module is connected to one end of the sixth resistor, the other end of the sixth resistor is connected to the base of the sixth transistor, the emitter of the sixth transistor is grounded, the collector of the sixth transistor is connected to the anode of the diode, the cathode of the diode is connected to one end of the seventh resistor, the control module is connected in parallel with the diode, the other end of the seventh resistor is connected to the collector of the seventh transistor, the emitter of the seventh transistor is connected to the power supply, the base of the seventh transistor is connected to one end of the eighth resistor, the other end of the eighth resistor is connected to the power supply, and the other end of the eighth resistor is connected to the second driving module.

4. A method for protecting a drive circuit, applied to the drive circuit described in claim 1, characterized in that, include: When the second transistor fails, the second input pin of the controller converts the high-level signal to a low-level signal, and the first input pin of the controller converts the low-level signal to a high-level signal, so that the third transistor is turned off, thereby turning off the switching device, disconnecting the drive circuit, and stopping the power device from operating.

5. The drive circuit protection method according to claim 4, characterized in that, The method further includes: When the second resistor is short-circuited with the power supply, the second input pin of the controller is controlled to convert the low-level signal into a high-level signal, so as to turn on the switching device, connect the drive circuit, and control the power device to operate. Alternatively, the controller's second input pin can be controlled to convert a high-level signal into a low-level signal, thereby turning off the switching device, disconnecting the drive circuit, and controlling the power device to stop operating.

6. The driving circuit protection method according to claim 4, characterized in that, The method further includes: When all devices are operating normally, the controller's first input pin and the controller's second input pin are switched from low level to high level to turn on the switching device, connect the drive circuit, and control the power device to operate.

7. The driving circuit protection method according to claim 4, characterized in that, The method further includes: When the two first input pins of the controller are short-circuited, the second input pins corresponding to the two first input pins of the controller will switch from high level to low level, so that the switching device in the drive circuit where the two first input pins of the controller are located will be turned on, the two drive circuits will be disconnected, and the power device on the drive circuit will be stopped.

8. A refrigeration device, characterized in that, It includes the drive circuit as described in any one of claims 1 to 3, and applies the drive circuit protection method as described in any one of claims 4 to 7.

9. A variable frequency refrigerator, characterized in that, It includes the drive circuit as described in any one of claims 1 to 3, and applies the drive circuit protection method as described in any one of claims 4 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the drive circuit protection method according to any one of claims 4 to 7.

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