Peripheral power-off protection circuit of fuel heater

Abstract

The invention relates to the technical field of electrical control, in particular to a peripheral power-off protection circuit for a fuel heater, and the circuit comprises a main power supply loop which is used for supplying power to the fuel heater in a normal power supply mode; the standby power supply loop is used for providing standby power for the heater fan when the main power supply loop is abnormally powered off; the charging management loop is used for charging the storage battery in a normal power supply mode; the power supply control module is used for responding to a local or remote starting instruction and controlling the main contactor to be closed to switch on a main power supply loop; the switching control module is used for monitoring a power supply state and controlling power switching; when the main power supply loop supplies power normally, the heater fan is controlled to be supplied with power by the main power supply loop; and when abnormal power failure of the main power supply loop is detected, the standby power supply loop is automatically switched to supply power to the heater fan. The circuit is used for preventing the fuel heater from being damaged due to the fact that a cooling fan of the fuel heater stops working due to sudden power failure.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of electrical control, in particular to a peripheral power-off protection circuit for fuel oil heater. BACKGROUND

[0002] As a kind of efficient independent heating equipment, fuel oil heater is widely used in various scenes due to its high thermal efficiency and strong heating capacity. However, its working characteristics require that the heat dissipation fan must continue to run to discharge the internal heat after shutdown, otherwise the high temperature will cause damage to the core components of the equipment, and even cause fire.

[0003] However, the power supply control mode of the fuel oil heater has obvious shortcomings. It mainly relies on manual operation. In actual use, the operator is prone to neglect or forget to directly cut off the main power supply after the equipment is shut down without sufficient heat dissipation. In addition, unexpected city power interruption (such as tripping, line failure, etc.) may occur in the use scene. These two abnormal power-off conditions will immediately stop the heat dissipation fan, expose the equipment to the high risk of overheating damage, and pose a serious safety hazard. Therefore, the previous use mode mostly relies on human control of the power-off time interval, which often causes the equipment to be damaged due to direct power-off after the equipment is shut down without considering the heat dissipation or sudden power-off in the use scene, and even causes fire and endangers human safety in serious cases.

[0004] Therefore, how to prevent sudden power-off from stopping the heat dissipation fan of the fuel oil heater and causing damage to the fuel oil heater is a technical problem that needs to be solved at present. SUMMARY

[0005] To solve the above technical problems, embodiments of the present application propose a peripheral power-off protection circuit for fuel oil heater, which is used to prevent sudden power-off from stopping the heat dissipation fan of the fuel oil heater and causing damage to the fuel oil heater.

[0006] To achieve the above purpose, embodiments of the present application propose a peripheral power-off protection circuit for fuel oil heater, which comprises: The main power supply circuit comprises a main circuit breaker Q1, a main relay K1 and a DC power supply G1 connected in sequence, and is used to supply power to the fuel oil heater in a normal power supply mode; The standby power supply circuit comprises a storage battery G2, which is used to provide standby power for the heater fan when the main power supply circuit abnormally powers off; The charging management circuit comprises a charger connected to the main power supply circuit, which is used to charge the storage battery G2 in the normal power supply mode; The control unit comprises a power supply control module and a switching control module; the power supply control module is used to control the main relay K1 to attract to connect the main power supply circuit in response to a local or remote start instruction; The switching control module is used for monitoring the power supply state and controlling the switching of the power supply; when the main power supply circuit normally supplies power, the heater fan is controlled to be powered by the main power supply circuit; when it is detected that the main power supply circuit abnormally stops supplying power, the heater fan is automatically switched to be powered by the standby power supply circuit.

[0007] To achieve the above-mentioned purpose, the embodiment of the present application also proposes a fuel heater peripheral power failure protection system, which comprises: an external power supply, a protection circuit and a fuel heater; the output end of the external power supply is connected with the input end of the protection circuit, and the output end of the protection circuit is connected with the fuel heater; the protection circuit is the fuel heater peripheral power failure protection circuit mentioned above.

[0008] To achieve the above-mentioned purpose, the embodiment of the present application also proposes a fuel heater peripheral power failure protection method, which comprises the following steps: In response to a local or remote start instruction, the main relay is controlled to be attracted to connect the main power supply circuit; When the main power supply circuit normally supplies power, the heater fan is controlled to be powered by the main power supply circuit; When it is detected that the main power supply circuit abnormally stops supplying power, the heater fan is automatically switched to be powered by the standby power supply circuit.

[0009] To achieve the above-mentioned purpose, the embodiment of the present application also proposes an electronic device, which comprises: a processor and a memory, wherein the memory stores instructions executable by the processor, and the processor is configured to execute the instructions, so that the electronic device can implement the fuel heater peripheral power failure protection method mentioned above.

[0010] To achieve the above-mentioned purpose, the embodiment of the present application also proposes a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor, so that the fuel heater peripheral power failure protection method mentioned above can be implemented.

[0011] The embodiment of the application provides an external power-off protection circuit of a fuel heater, and the protection circuit comprises a main power supply circuit, a backup power supply circuit, a charging management circuit and a control unit; the main power supply circuit comprises a total circuit breaker Q1, a main relay K1 and a direct current power supply G1 connected in sequence, and is used for supplying power for the fuel heater in a normal power supply mode; the backup power supply circuit comprises a storage battery G2, and is used for providing backup power for a heater fan when the main power supply circuit is abnormally powered off; the charging management circuit comprises a charger connected to the main power supply circuit, and is used for charging the storage battery G2 in the normal power supply mode, so that power support can be provided when the subsequent main power supply circuit is abnormal and needs to be switched to the backup power supply circuit; the control unit comprises a power supply control module and a switching control module; the power supply control module is used for controlling the main relay K1 to attract and connect the main power supply circuit in response to a local or remote starting instruction, and the switching control module is used for monitoring a power supply state and controlling power switching; when the main power supply circuit is normally powered, the heater fan is powered by the main power supply circuit; when it is detected that the main power supply circuit is abnormally powered off, the heater fan is automatically switched to be powered by the backup power supply circuit, so that the heater fan of the fuel heater can still be powered when the fuel heater is suddenly powered off, the internal high-temperature components of the heater can still continuously dissipate heat, and the fuel heater can be remotely controlled and remotely operated at the same time; based on this, the scheme can prevent the heater fan of the fuel heater from stopping working due to sudden power-off, so that the fuel heater is prevented from being damaged.

[0012] Optionally, the switching control module specifically comprises a main power state relay K5; a coil of the main power state relay K5 is powered by the main power supply circuit; when the main power supply circuit is normally powered, the coil of the main power state relay K5 is powered, so that normally closed contacts of the main power state relay K5 connected to the backup power supply circuit are disconnected, so that the heater fan is powered by the direct current power supply G1; when the main power supply circuit is abnormally powered off, the coil of the main power state relay K5 is powered off, so that the normally closed contacts of the main power state relay K5 are closed, power of the storage battery G2 is output through the normally closed contacts of the main power state relay K5, and the heater fan is powered by the storage battery G2.

[0013] Optionally, the switching control module further comprises a fan power supply switching relay K6 and a delay relay K4; when the normally closed contacts of the main power state relay K5 are disconnected in the normal power supply mode, the coil of the fan power supply switching relay K6 is not powered, and the fan is powered by the main circuit; when the normally closed contacts of the main power state relay K5 are closed in the abnormal power-off mode, the normally open contacts of the delay relay K4 are closed after a preset delay time, the coil of the fan power supply switching relay K6 is powered, and the normally open contacts of the fan power supply switching relay K6 are attracted, so as to ensure that the heater fan is connected to the backup circuit for power supply.

[0014] Optionally, the power supply control module specifically comprises: a local control switch S1 and a remote control relay K2; when local control is performed, the local control switch S1 is closed, so that the coil of the main relay K1 is powered to be attracted; when remote control is performed, the coil of the remote control relay K2 is driven by the controller to be powered, and the normally open contact thereof is closed, thereby causing the coil of the main relay K1 to be powered to be attracted.

[0015] Optionally, the power supply control module further comprises a system starting relay K3; the contact of the local control switch S1 or the remote control relay K2 controls the on-off of the coil of the system starting relay K3; the normally open contact of the system starting relay K3 is used to control the power supply circuit of the coil of the delay relay K4.

[0016] Optionally, the controller has a communication function, is used for performing data interaction with the heater HMI screen of the fuel heater through a CAN communication protocol, remotely reads the running information of the fuel heater, and remotely controls the working mode of the fuel heater.

[0017] Optionally, the controller is hung and centrally controls a plurality of fuel heaters, and is used for one-key starting and one-key closing of the hung fuel heaters.

[0018] Optionally, the protection circuit further comprises: a multi-stage protection circuit; The multi-stage protection circuit comprises a total circuit breaker Q1, an independent protection circuit breaker Q2 arranged for the heater host and the heater HMI screen, an independent protection circuit breaker Q3 arranged for the heater fan, and an independent protection circuit breaker Q4 arranged for the DC power supply and the charger circuit, so as to realize the hierarchical protection of the circuit.

[0019] Optionally, the controller is a programmable logic controller or a single-chip microcomputer, has a control program burned in the inside, and has a program burning interface reserved on the controller. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technical solutions, the drawings needed to be used in the embodiments of the present application or the related technical solutions will be briefly introduced below. Obviously, the following drawings are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings. The drawings described herein are only used to explain the present application, and are not used to limit the present application.

[0021] Figure 1 It is a macroscopic composition diagram of a peripheral power-off protection circuit of a fuel heater provided in an embodiment of the present application; Figure 2 It is a circuit principle diagram of a peripheral power-off protection circuit of a fuel heater provided in an embodiment of the present application; Figure 3 is a circuit schematic of a backup power supply circuit provided by an embodiment of the present application; Figure 4 is a specific component diagram of a fuel heater peripheral power-off protection circuit provided by an embodiment of the present application; Figure 5 is a flow chart of a fuel heater peripheral power-off protection circuit provided by an embodiment of the present application; Figure 6 is a structural diagram of a fuel heater peripheral power-off protection system provided by another embodiment of the present application; Figure 7 is a flow chart of a fuel heater peripheral power-off protection method provided by another embodiment of the present application; Figure 8 is a structural schematic diagram of a fuel heater peripheral power-off protection device provided by another embodiment of the present application; Figure 9 is a structural schematic diagram of an electronic device provided by another embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the drawings. Those skilled in the art can understand that, in the embodiments of the present application, many technical details are proposed in order to make the readers better understand. However, even without these technical details and based on various changes and modifications of the following embodiments, the technical solutions claimed by the present application can be implemented. The following embodiments are classified for the convenience of description, and should not constitute any limitation on the specific implementation of the present application. The following embodiments can be combined and referenced with each other without contradiction.

[0023] The fuel heater is a kind of efficient independent heating equipment, which is widely used in various scenes due to its high thermal efficiency and strong heating capacity. However, its working characteristics require that after shutdown, the heat dissipation fan must continue to run to discharge the internal heat, otherwise the high temperature will cause damage to the core components of the equipment, and even cause fire.

[0024] However, the power supply control method for fuel-fired heaters has significant shortcomings. It relies heavily on manual operation, and in actual use, operators are prone to negligence or forgetfulness, cutting off the main power supply directly after the equipment has been shut down without allowing it to fully cool down. Furthermore, unexpected city-wide power outages (such as tripping or line faults) may occur in the usage scenario. Both of these abnormal power outages will immediately stop the cooling fan, exposing the equipment to a high risk of overheating and damage, posing a serious safety hazard. Previous usage methods largely relied on manual control of power outage intervals, often resulting in oversights such as forgetting to check the equipment's cooling status after shutdown before cutting off power, or sudden power outages in the usage scenario, leading to equipment damage and, in severe cases, fires endangering human and machine safety.

[0025] Therefore, how to prevent the cooling fan of the fuel heater from stopping due to a sudden power outage, which could lead to damage to the fuel heater, is a technical problem that urgently needs to be solved.

[0026] In view of this, the present application proposes a power failure protection circuit for the fuel heater. By providing power to the cooling fan even when the fuel heater is suddenly powered off, the high-temperature components inside the heater can continue to dissipate heat, thereby preventing the fuel heater from being damaged due to the cooling fan stopping working when the power is suddenly cut off.

[0027] like Figure 1 As shown, Figure 1 This is a macroscopic diagram illustrating the peripheral power failure protection circuit for a fuel heater, provided as an embodiment of this application. The protection circuit includes: a main power supply circuit 110, a backup power supply circuit 120, a charging management circuit 130, and a control unit 140.

[0028] The main power supply circuit 110 includes a main circuit breaker Q1, a main relay K1 and a DC power supply G1 connected in sequence, which are used to supply power to the fuel heater in the normal power supply mode.

[0029] For example, the main power supply circuit 110 is the main power source for the circuit in normal power supply mode, and is responsible for providing stable power to the fuel heater.

[0030] For example, a fuel oil heater may include a heater main unit, a heater fan, and a heater display screen for the fuel oil heater.

[0031] For example, such as Figure 2 As shown, Figure 2This is a circuit diagram of a power failure protection circuit for a fuel heater, provided as an embodiment of this application. The main circuit breaker Q1 serves as the main protection device for the circuit, connected to the output terminal of the input power supply (e.g., single-phase AC 220V) to prevent overload or short-circuit faults and ensure the safety of the entire circuit. The main relay K1 is controlled by a power supply control module (e.g., a local switch S1 or a controller). When the coil of the main relay K1 is energized, its normally open contact closes, connecting the power supply path of the DC power supply G1. The DC power supply G1 converts the input AC power into DC power to supply power to the fuel heater; when the main power supply circuit 110 is operating normally, the DC power supply G1 outputs DC power, and the power supply status is displayed via indicator light H1.

[0032] The main power supply circuit 110 operates as follows: Under normal power supply mode, the input current, after being protected by the main circuit breaker Q1, is connected through the main relay K1, energizing the DC power supply G1 to power the heater fan and the heater main unit. Simultaneously, the charging management circuit 130 is also connected to the main power supply circuit 110 to ensure that the battery G2 is charged.

[0033] The backup power supply circuit 120 includes a battery G2, which is used to provide backup power to the heater fan when the main power supply circuit 110 fails to power.

[0034] For example, the backup power supply circuit 120 is used to provide emergency power in the event of an abnormal power outage of the main power supply circuit 110, ensuring that the heater fan continues to operate, thereby preventing the fuel heater from being damaged due to overheating. Its core component is the battery G2.

[0035] For example, such as Figure 2 As shown, Figure 2 A circuit diagram of a power failure protection circuit for a fuel heater is provided as an embodiment of this application. Figure 3 As shown, Figure 3 A circuit diagram of a backup power supply circuit provided in one embodiment of this application: Battery G2 serves as a backup power source. During normal power supply, it is charged by the charging management circuit 130. In the event of an abnormal power outage, it automatically starts operating to provide DC power to the heater fan. When the main power supply circuit 110 is de-energized, the coil of the main power status relay K5 is de-energized, and its normally closed contacts (1, 3) close, allowing the power from battery G2 to be supplied to the fan circuit through components such as the fan power supply switching relay K6.

[0036] Understandably, the design of the backup power supply circuit 120 ensures seamless switching: once an interruption of the main power supply circuit 110 is detected, the circuit immediately switches to power supply from the battery G2, and the heater fan continues to operate until the fuel heater temperature decreases.

[0037] The charging management circuit 130 includes a charger connected to the main power supply circuit 110 for charging the battery G2 in the normal power supply mode.

[0038] The charging management circuit 130 is responsible for charging the battery G2 in the normal power supply mode and maintaining its standby capability. The core component of the charging management circuit 130 is a charger which can be directly connected to the main power supply circuit 110.

[0039] For example, as shown in the figure, Figure 2 , Figure 2 The circuit principle diagram of the fuel heater peripheral power-off protection circuit provided by an embodiment of the application is as follows: when the main power supply circuit 110 works normally, the charger obtains power from the DC power supply G1 or the input power supply to charge the battery G2, ensuring that the battery G2 is in a full power state. In the normal power supply, the charger is connected in parallel with the battery G2, and the charging current is protected by the independent protection circuit Q4 to prevent overcharging or short circuit.

[0040] In a possible embodiment, a diode is arranged at the connection between the main power supply circuit 110 and the standby power supply circuit 120 to prevent the current of the battery G2 from flowing reversely into the DC power supply G1 or the main power supply circuit 110.

[0041] In a possible embodiment, the protection circuit further includes a multi-stage protection circuit 150, and the multi-stage protection circuit 150 includes a total circuit breaker Q1, an independent protection circuit Q2 arranged for the heater host and the heater Han display screen, an independent protection circuit Q3 arranged for the heater fan, and an independent protection circuit Q4 arranged for the DC power supply and the charger circuit, to realize the hierarchical protection of the circuit.

[0042] For example, each circuit breaker is in a closed state when used.

[0043] For example, the total circuit breaker Q1 is arranged at the input end of the entire circuit and is directly connected to the external single-phase AC 220V power supply. The protection range of the total circuit breaker Q1 covers the elements in the subsequent stage, including the main contactor K1, the DC power supply G1, the charger, and each branch circuit breaker. When any serious fault occurs in the circuit which may cause the total current to abnormally rise, the total circuit breaker Q1 will quickly cut off the total power supply to ensure the safety of the entire system.

[0044] For example, the heater host and the heater Han display screen protection circuit Q2 provides independent overload and short circuit protection for the heater Han display screen. It can be understood that when the branch fails and the Q2 trips, it will not affect the normal work of other circuit breakers, realizing fault isolation and facilitating rapid positioning and maintenance.

[0045] For example, the heater blower protection circuit Q3 is used to protect the heater blower.

[0046] For example, the DC power supply and charger circuit protection circuit Q4 is used to protect the circuit where the DC power supply G1 and the charger are located. For example, when the charger has an internal short circuit, the DC power supply and charger circuit protection circuit Q4 will be quickly disconnected, while the total circuit breaker Q1 and other branch circuit breakers may remain closed, and the system can still provide backup power for the heater blower through the battery, and the protection function is not affected.

[0047] The control unit 140 includes a power supply control module and a switching control module. The power supply control module is used to control the main relay K1 to be attracted to connect the main power supply circuit 110 in response to a local or remote start instruction. The switching control module is used to monitor the power supply state and control the switching of power. When the main power supply circuit 110 is normally powered, the heater blower is powered by the main power supply circuit 110. When the main power supply circuit 110 is detected to be abnormally powered off, the heater blower is automatically switched to be powered by the backup power supply circuit 120.

[0048] In a possible embodiment, the power supply control module specifically includes a local control switch S1 and a remote control relay K2. When local control is performed, the local control switch S1 is closed, so that the coil of the main relay K1 is powered to be attracted. When remote control is performed, the coil of the remote control relay K2 is powered by the controller, and the normally open contact of the remote control relay K2 is closed, thereby causing the coil of the main relay K1 to be powered to be attracted.

[0049] In a possible embodiment, the power supply control module further includes a system start relay K3. The contact of the local control switch S1 or the remote control relay K2 controls the on-off of the coil of the system start relay K3. The normally open contact of the system start relay K3 is used to control the power supply circuit of the coil of the delay relay K4.

[0050] In a possible embodiment, the controller has a communication function, is used to perform data interaction with the heater display screen of the fuel heater through a CAN communication protocol, remotely reads the running information of the fuel heater, and remotely controls the working mode of the fuel heater.

[0051] In a possible embodiment, the controller is hung and centrally controls a plurality of fuel heaters, and is used to perform one-key starting and one-key closing on the hung fuel heaters.

[0052] For example, as shown in FIG. 1, the fuel heater peripheral power-off protection circuit includes a main power supply circuit 110, a backup power supply circuit 120, a total circuit breaker Q1, a heater blower protection circuit Q3, a DC power supply and charger circuit protection circuit Q4, a control unit 140, and a heater 150. Figure 2 As shown in FIG. 2, the fuel heater peripheral power-off protection circuit includes a main power supply circuit 110, a backup power supply circuit 120, a total circuit breaker Q1, a heater blower protection circuit Q3, a DC power supply and charger circuit protection circuit Q4, a control unit 140, and a heater 150. Figure 2 As shown in FIG. 2, the fuel heater peripheral power-off protection circuit includes a main power supply circuit 110, a backup power supply circuit 120, a total circuit breaker Q1, a heater blower protection circuit Q3, a DC power supply and charger circuit protection circuit Q4, a control unit 140, and a heater 150.

[0053] For example, if local control is performed, the power supply control module is operated by the local switch S1; that is, after the local switch S1 is closed, the coil of the main relay K1 is powered, the normally open contact of the main relay K1 is closed, the main power supply circuit 110 is connected, and the DC power supply G1 is powered. The rear stage indicator lamp H1 of the DC power supply G1 is bright, the fuel heater power supply is normal, the coil of the relay K5 is powered, the normally closed point (1, 3) of the relay K5 is disconnected, the heater fan is powered by the DC power supply G1, and the heater fan works. At the same time, the charger starts to charge the storage battery G2. After the local switch S1 is closed, the system starting relay K3 coil is powered, the normally open point (1, 2) of the system starting relay K3 is closed, and the delay relay K4 coil is powered, the normally open point (2, 7) of the delay relay K4 is closed. At this time, the normally closed point (1, 3) of the main power state relay K5 is disconnected, so the coil of the fan power supply switching relay K6 is not powered, the normally open point of the fan power supply switching relay K6 continues to be normally open, and the normally closed point of the fan power supply switching relay K6 continues to be normally closed. Therefore, in the normal power supply, the fan of the fuel heater is powered by the DC power supply G1.

[0054] For another example, if remote start is performed, the remote control relay K2 is controlled by outputting a remote start instruction (for example, performing I / O output) by the controller; after the coil of the remote control relay K2 is powered, the normally open contacts (1, 2) and (3, 4) of the remote control relay K2 are closed, the main relay K1 is indirectly controlled to be attracted, and remote power supply is realized.

[0055] In a possible embodiment, the controller is a programmable logic controller or a single-chip microcomputer, the controller has a control program burned therein, and the controller has a program burning interface reserved thereon.

[0056] In a possible embodiment, the switching control module specifically comprises the main power state relay K5; the coil of the main power state relay K5 is powered by the main power supply circuit 110; when the main power supply circuit 110 is normally powered, the coil of the main power state relay K5 is powered, the normally closed contact of the main power state relay K5 connected to the standby power supply circuit 120 is disconnected, so that the heater fan is powered by the DC power supply G1; when the main power supply circuit 110 is abnormally powered, the coil of the main power state relay K5 is powered, the normally closed contact of the main power state relay K5 is closed, the power of the storage battery G2 is output through the normally closed contact of the main power state relay K5, and then the coil of the fan power supply switching relay K6 is powered, so that the heater fan is powered by the storage battery G2.

[0057] In one possible embodiment, the switching control module further includes a fan power supply switching relay K6 and a time delay relay K4. In normal power supply mode, when the normally closed contact of the main power status relay K5 is open, the coil of the fan power supply switching relay K6 is not energized, and the fan is powered by the main circuit. In abnormal power failure mode, when the normally closed contact of the main power status relay K5 is closed, the normally closed contact of the time delay relay K4 closes after a preset delay time, energizing the coil of the fan power supply switching relay K6 and causing its normally open contact to close, thereby ensuring the connection between the heater fan and the backup circuit power supply.

[0058] For example, the time-delay relay K4 is used to power the coil of the fan power supply switching relay K6 after a preset delay time when the backup power supply circuit is turned on.

[0059] like Figure 4 As shown, Figure 4 A specific composition diagram of a power failure protection circuit for a fuel heater, provided as an embodiment of this application, includes: a circuit breaker, a switch, a relay / contactor, a diode, a DC power supply, a heater main unit, a heater display screen, a controller, a charger, a battery, and a heater fan. The heater fan, heater main unit, and heater display screen together constitute the fuel heater, while the other components are important electrical components forming the peripheral circuit of the fuel heater.

[0060] As in the above embodiment: the circuit breaker may include a main circuit breaker Q1, an independent protection circuit breaker Q2 for the heater main unit and the heater display screen, an independent protection circuit breaker Q3 for the heater fan, and an independent protection circuit breaker Q4 for the DC power supply and charger circuit. The switch may include a local control switch S1.

[0061] Relays, also known as contactors, may include: main relay K1, remote control relay K2, system start relay K3, time delay relay K4, main power status relay K5, and fan power supply switching relay K6. DC power supply may include: DC power supply G1. Storage battery may include: storage battery G2.

[0062] like Figure 5 As shown, Figure 5A flow chart of a fuel heater peripheral power-off protection circuit is provided for an embodiment of the present application. The protection circuit, when in operation, input current first passes through a circuit breaker (i.e. main relay) for power protection of the subsequent power-consuming device, and then passes through a switch to the contactor through the operator's use, and the contactor is connected to the power supply for the heater host and the heater fan power supply. The heater host performs human-computer interaction operation through the heater Han display screen, and the operator can control the temperature and working mode of the fuel heater through the heater Han display screen. In order to facilitate operation, the embodiment of the present application is provided with a controller, which can be used by the operator to remotely operate the heater Han display screen and further control the working mode of the fuel heater. The controller can centrally control multiple fuel heaters to realize one-key start or one-key stop of the fuel heater group. The heater Han display screen and the heater host communicate through CAN protocol, and the controller and the heater Han display screen also communicate through CAN protocol. Both signals are bidirectional.

[0063] An embodiment of the present application proposes a fuel heater peripheral power-off protection circuit. The protection circuit includes a main power supply circuit 110, a backup power supply circuit 120, a charging management circuit 130, and a control unit 140. The main power supply circuit 110 includes a total circuit breaker Q1, a main relay K1, and a DC power supply G1 connected in sequence, for supplying power to the fuel heater in normal power supply mode. The backup power supply circuit 120 includes a storage battery G2, for providing backup power to the heater fan when the main power supply circuit 110 abnormally powers off. The charging management circuit 130 includes a charger connected to the main power supply circuit 110, for charging the storage battery G2 in normal power supply mode, so as to provide power support when the subsequent main power supply circuit abnormally powers off and needs to switch to the backup power supply circuit 120. The control unit 140 includes a power supply control module and a switching control module. The power supply control module is used to control the main relay K1 to attract to connect the main power supply circuit 110 in response to a local or remote start instruction, and the switching control module is used to monitor the power supply state and control the switching of power. When the main power supply circuit 110 normally powers on, the heater fan is powered by the main power supply circuit 110. When it is detected that the main power supply circuit 110 abnormally powers off, the heater fan is automatically switched to be powered by the backup power supply circuit 120, so that the heater fan can still be powered when the fuel heater suddenly powers off, the internal high-temperature components of the fuel heater can still continuously dissipate heat, and the fuel heater can be remotely controlled and operated. Based on this, the present scheme can prevent the fuel heater from being damaged due to the stop of the heater fan caused by sudden power-off.

[0064] As shown in Figure 6 , the control unit 140 includes a power supply control module and a switching control module. The power supply control module is used to control the main relay K1 to attract to connect the main power supply circuit 110 in response to a local or remote start instruction, and the switching control module is used to monitor the power supply state and control the switching of power. When the main power supply circuit 110 normally powers on, the heater fan is powered by the main power supply circuit 110. When it is detected that the main power supply circuit 110 abnormally powers off, the heater fan is automatically switched to be powered by the backup power supply circuit 120, so that the heater fan can still be powered when the fuel heater suddenly powers off, the internal high-temperature components of the fuel heater can still continuously dissipate heat, and the fuel heater can be remotely controlled and operated. Based on this, the present scheme can prevent the fuel heater from being damaged due to the stop of the heater fan caused by sudden power-off. Figure 6A structure diagram of a fuel heater peripheral power-off protection system is provided for another embodiment of the present application. The system comprises: an external power supply 610, a protection circuit 620 and a fuel heater 630; an output end of the external power supply 610 is connected with an input end of the protection circuit 620, and an output end of the protection circuit 620 is connected with the fuel heater 630.

[0065] The external power supply 610 can be a power supply with an input voltage of single-phase AC 220V. The protection circuit 620 is a fuel heater peripheral power-off protection circuit as described in the above embodiment. For specific description of the external power supply 610, the protection circuit 620 and the fuel heater 630, reference can be made to the above embodiment, which will not be repeated here.

[0066] The implementation details of a fuel heater peripheral power-off protection method provided by the present embodiment will be described in detail below. The following details are provided for the convenience of understanding and are not essential for implementing the present embodiment.

[0067] As shown in Figure 7 , Figure 7 A flow chart of a fuel heater peripheral power-off protection method is provided for another embodiment of the present application. The method is applied to a fuel heater peripheral power-off protection circuit as described in the above embodiment. The method comprises: Step 710: in response to a local or remote start instruction, the main relay is controlled to be attracted to connect the main power supply circuit.

[0068] Step 720: when the main power supply circuit is normally powered, the heater fan is controlled to be powered by the main power supply circuit.

[0069] Step 730: when it is detected that the main power supply circuit is abnormally powered off, the heater fan is automatically switched to be powered by the standby power supply circuit.

[0070] The steps of the above methods are only for the purpose of clear description. In the implementation, the steps can be combined into one step, or some steps can be divided into multiple steps, as long as the same logical relationship is included, which is within the protection scope of the present application. Irrelevant modifications or irrelevant designs can be added to the algorithm or the flow, but the core design of the algorithm and the flow is not changed, which is within the protection scope of the present application.

[0071] Another embodiment of the present application provides a fuel heater peripheral power-off protection device. The details of the fuel heater peripheral power-off protection device provided by the present embodiment will be described in detail below. The following details are provided for the convenience of understanding and are not essential for implementing the present embodiment, Figure 8 is a structure diagram of a fuel heater peripheral power-off protection device provided by the present embodiment, which comprises: The control module 810 is configured to control the main relay to be attracted to turn on the main power supply circuit in response to a local or remote starting instruction.

[0072] The control module 810 is further configured to control the heater fan to be powered by the main power supply circuit when the main power supply circuit normally supplies power.

[0073] The switching module 820 is configured to automatically switch to power the heater fan by the backup power supply circuit when it is detected that the main power supply circuit is abnormally powered off.

[0074] It can be found that the embodiment is a system embodiment corresponding to the above-mentioned method embodiment, and the embodiment can be implemented in cooperation with the above-mentioned method embodiment. The related technical details and technical effects mentioned in the above-mentioned method embodiment are still valid in the embodiment. In order to reduce repetition, they will not be described here. Accordingly, the related technical details mentioned in the embodiment can also be applied to the above-mentioned method embodiment.

[0075] It is worth mentioning that each module and module involved in the embodiment is a logical module. In actual application, a logical unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. In addition, in order to highlight the innovative part of the present application, units not closely related to solving the technical problems proposed in the present application are not introduced in the embodiment, but this does not mean that there are no other units in the embodiment.

[0076] Another embodiment of the present application provides an electronic device, as shown in the figure, comprising a processor 91 and a memory 92, the memory 92 stores instructions executable by the processor 91, and the processor 91 is configured to execute the instructions, so that the electronic device can implement a fuel heater peripheral power-off protection method as described in the above method embodiment. Figure 9

[0077] Wherein, the memory and the processor are connected in a bus mode, the bus includes any number of interconnected buses and bridges, and the bus connects various circuits of one or more processors and memories together. The bus can also connect various other circuits such as peripheral devices, voltage stabilizers and power management circuits together, which are well known in the art, and therefore will not be further described herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be one element or multiple elements such as multiple receivers and transmitters, which provide a unit for communicating with various other devices on the transmission medium. The data processed by the processor is transmitted on the wireless medium through the antenna, and further, the antenna also receives data and transmits the data to the processor.

[0078] ​The processor is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interface, voltage regulation, power management, and other control functions. The memory can be used to store data used by the processor in performing operations.

[0079] Another embodiment of the present application provides a computer readable storage medium, wherein a computer program is stored in the computer readable storage medium, and the computer program, when executed by a processor, implements the fuel heater peripheral power-off protection method in the above method embodiment.

[0080] That is, a person skilled in the art can understand that all or part of the steps in the above method embodiments can be completed by programs instructing relevant hardware, the programs are stored in a storage medium, and the programs include a plurality of instructions for causing a device (such as a single-chip microcomputer, a chip, etc.) or a processor to execute all or part of the steps of the method described in the method embodiments of the present application. The foregoing storage medium includes a U disk, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk, and various storage media that can store program codes.

[0081] A person skilled in the art can understand that each of the above embodiments is a specific embodiment for implementing the present application, and in actual application, various changes can be made in form and details without departing from the spirit and scope of the present application. For those skilled in the art, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements are also regarded as the protection scope of the present application.

Claims

1. A power failure protection circuit for a fuel heater, characterized in that, The protection circuit includes: main power supply circuit, backup power supply circuit, charging management circuit and control unit; The main power supply circuit includes a main circuit breaker (Q1), a main relay (K1), and a DC power supply (G1) connected in sequence, which are used to supply power to the fuel heater in normal power supply mode; The backup power supply circuit includes a battery (G2) to provide backup power to the heater fan in the event of an abnormal power outage in the main power supply circuit; The charging management circuit includes a charger connected to the main power supply circuit for charging the battery (G2) in normal power supply mode; The control unit includes a power supply control module and a switching control module; the power supply control module is used to respond to local or remote start commands and control the main relay (K1) to engage to connect the main power supply circuit. The switching control module is used to monitor the power supply status and control the power switching; when the main power supply circuit is supplying power normally, it controls the heater fan to be powered by the main power supply circuit; when an abnormal power failure is detected in the main power supply circuit, it automatically switches to the backup power supply circuit to supply power to the heater fan.

2. The protection circuit according to claim 1, characterized in that, The switching control module specifically includes the main power status relay (K5); The coil of the main power status relay (K5) is powered by the main power supply circuit; When the main power supply circuit is powered normally, the coil of the main power status relay (K5) is energized, causing the normally closed contact of the main power status relay (K5) connected to the backup power supply circuit to open, so that the heater fan is powered by the DC power supply (G1). When the main power supply circuit experiences an abnormal power outage, the coil of the main power status relay (K5) loses power, causing the normally closed contact of the main power status relay (K5) to close. Power from the battery (G2) is then output through the normally closed contact of the main power status relay (K5) so that the heater fan is powered by the battery (G2).

3. The protection circuit according to claim 2, characterized in that, The switching control module also includes a wind turbine power supply switching relay (K6) and a time delay relay (K4). In normal power supply mode, when the normally closed contact of the main power status relay (K5) is open, the coil of the fan power supply switching relay (K6) is not energized, and the fan is powered by the main circuit; In abnormal power failure mode, when the normally closed contact of the main power status relay (K5) closes, the normally open contact of the time delay relay (K4) closes after a preset delay time, energizing the coil of the fan power supply switching relay (K6) and causing its normally open contact to close, thus ensuring the connection between the heater fan and the backup circuit power supply.

4. The protection circuit according to claim 3, characterized in that, The power supply control module specifically includes: a local control switch (S1) and a remote control relay (K2); When performing local control, close the local control switch (S1) to energize and engage the coil of the main relay (K1); When remote control is performed, the controller drives the coil of the remote control relay (K2) to be energized, its normally open contact closes, and in turn energizes the coil of the main relay (K1) to be engaged.

5. The protection circuit according to claim 4, characterized in that, The power supply control module also includes a system start relay (K3); The local control switch (S1) or the remote control relay (K2) is used to control the on / off state of the coil of the system start relay (K3); the normally open contact of the system start relay (K3) is used to control the power supply circuit of the coil of the time delay relay (K4).

6. The protection circuit according to claim 5, characterized in that, The controller has communication capabilities, which are used to interact with the fuel heater's display screen via the CAN communication protocol to remotely read the fuel heater's operating information and remotely control the fuel heater's operating mode.

7. The protection circuit according to claim 6, characterized in that, The controller connects to and centrally controls multiple fuel heaters, enabling one-button start and one-button shutdown of the connected fuel heaters.

8. The protection circuit according to claim 7, characterized in that, The protection circuit also includes: multi-level protection circuit; The multi-level protection circuit includes a main circuit breaker (Q1), an independent protection circuit breaker (Q2) for the heater main unit and the heater display screen, an independent protection circuit breaker (Q3) for the heater fan, and an independent protection circuit breaker (Q4) for the DC power supply and charger circuit, so as to realize the graded protection of the circuit.

9. The protection circuit according to claim 8, characterized in that, The controller is a programmable logic controller or a microcontroller, which has a control program burned into it, and the controller has a reserved program burning interface.

10. A power failure protection system for a fuel oil heater, characterized in that, An external power supply, a protection circuit, and a fuel heater are provided; the output terminal of the external power supply is connected to the input terminal of the protection circuit, and the output terminal of the protection circuit is connected to the fuel heater; the protection circuit is a power failure protection circuit for the fuel heater as described in any one of claims 1 to 9.

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