Power-off protection circuit of vertical disinfection cabinet

Abstract

The utility model discloses a power-off protection circuit for a vertical disinfection cabinet, which relates to the technical field of vertical disinfection cabinets and comprises a power supply control module used for accessing alternating-current electric energy, transmitting the electric energy, rectifying and filtering and stabilizing voltage; the power failure detection module is used for detecting power failure; the disinfection control module is used for regularly controlling the disinfection work of the disinfection module; the protection trigger module is used for regularly providing a third control signal in a high-level state after the disinfection work is started; the standby power supply control module is used for controlling the standby power supply work of the standby power supply module and the power-off work of the power supply control module in a self-locking manner if power-off occurs during the period of receiving the third control signal; and the standby power supply module is used for inverting and supplying power to the power supply control module. According to the power-off protection circuit of the vertical disinfection cabinet, when the disinfection work is started and only after the disinfection for a period of time, the standby power supply work can be carried out if the power-off condition occurs, and meanwhile, the power supply of the power supply control module is cut off.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical disinfection cabinets, in particular to a power-off protection circuit of a vertical disinfection cabinet. Background Art

[0002] A vertical disinfection cabinet is a device that sterilizes, disinfects, and keeps warm and dehumidifies tableware and cutlery by means of ultraviolet rays, far infrared rays, high temperature, ozone, and the like. After the existing vertical disinfection cabinet starts disinfection, in order to prevent power outages caused by poor plug contact, power outages at the power supply end, and the like, most of the existing vertical disinfection cabinets will use a backup power supply for backup power supply to ensure that the vertical disinfection cabinet completes the disinfection work. However, if the power outage caused by poor contact occurs soon after the disinfection work is started, the backup power supply will be controlled for backup power supply, increasing the number of times the backup power supply is used, which is likely to reduce the service life of the backup power supply in the long run. Moreover, when the vertical disinfection cabinet loses power due to poor contact, since the power supply of the plug cannot be completely disconnected, the voltage conflict that occurs during the backup power supply is likely to cause damage to the vertical disinfection cabinet, posing certain safety hazards, and thus needs to be improved. Utility Model Content

[0003] The embodiment of the utility model provides a power-off protection circuit for a vertical disinfection cabinet to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A power-off protection circuit for a vertical disinfection cabinet comprises: a power control module, a power-off detection module, a disinfection control module, a disinfection module, a protection trigger module, a backup power supply control module and a backup power supply module;

[0006] A power control module, connected to the backup power module and the backup power supply control module, used to access and transmit AC power, used to rectify, filter and stabilize the transmitted AC power and the power provided by the backup power module, used to receive the protection signal output by the backup power supply control module and stop the transmission of AC power;

[0007] A power failure detection module, connected to the power control module, for isolating and detecting power failure of the rectified and filtered electric energy and outputting a first control signal when power is failed;

[0008] A disinfection control module, connected to the power control module and the disinfection module, for receiving the electric energy processed by the power control module and regularly outputting a second control signal, and regularly transmitting the AC electric energy transmitted by the power control module to the disinfection module;

[0009] A disinfection module, used for disinfection work;

[0010] A protection trigger module, connected to the disinfection control module, for receiving the second control signal and performing energy storage, and for delaying output of a third control signal when the stored electric energy reaches a set voltage threshold;

[0011] A backup power supply control module, connected to the protection trigger module, the power-off detection module and the backup power supply module, for performing self-locking processing on the received first control signal and outputting a protection signal to control the backup power supply operation of the backup power supply module and the power-off operation of the power supply control module during the period of receiving the third control signal;

[0012] The backup power supply module is used to provide auxiliary power, receive protection signals and invert the auxiliary power, and transmit the inverted power to the power control module.

[0013] As a further solution of the utility model: the power control module includes a power interface, a first relay switch, a first rectifier, a first capacitor, a first voltage regulator and a second capacitor;

[0014] Preferably, the first end and the second end of the power interface are respectively connected to the first moving end and the second moving end of the first relay switch, the first fixed end and the second fixed end of the first relay switch are respectively connected to the first input end and the second input end of the first rectifier, the first output end of the first rectifier is connected to one end of the first capacitor and the third end of the first voltage regulator, the second end of the first voltage regulator is connected to one end of the second capacitor, and the second output end of the first rectifier, the other end of the first capacitor, the first end of the first voltage regulator and the other end of the second capacitor are all grounded.

[0015] As a further solution of the utility model: the power failure detection module includes a first resistor, a first power supply, a second resistor and a first optical coupler;

[0016] Preferably, the first end of the first optocoupler is connected to the first output end of the first rectifier through the first resistor, the second end of the first optocoupler is connected to the second output end of the first rectifier, the third end of the first optocoupler is connected to the backup control module and connected to the first power supply through the second resistor, and the fourth end of the first optocoupler is grounded.

[0017] As a further solution of the utility model: the disinfection control module includes a disinfection time control device, a second relay, a first fuse and a second relay switch; the disinfection module includes a disinfection device;

[0018] Preferably, the power supply end of the disinfection time control device is connected to the second end of the first voltage stabilizer, the control end of the disinfection time control device is connected to the protection trigger module and one end of the second relay, the other end of the second relay is grounded, one end of the first fuse is connected to the first fixed end of the first relay switch, the other end of the first fuse is connected to the fixed end of the second relay switch, the moving end of the first fuse is connected to one end of the disinfection device, and the other end of the disinfection device is connected to the second fixed end of the first relay switch.

[0019] As a further solution of the utility model: the protection trigger module includes a third resistor, a first switch tube, a third capacitor, a fifth resistor, a fourth resistor, a sixth resistor and a second switch tube;

[0020] Preferably, the collector of the first switch tube is connected to the collector of the second switch tube and is connected to the second end of the first regulator through the third resistor, the base of the first switch tube is connected to the control end of the disinfection time control device, the emitter of the first switch tube is connected to one end of the third capacitor and one end of the fifth resistor and is connected to the base of the second switch tube through the sixth resistor, the emitter of the second switch tube is connected to the backup power supply control module and is grounded through the fourth resistor, and the other end of the third capacitor and the other end of the fifth resistor are both grounded.

[0021] As a further solution of the utility model: the backup power supply control module includes a ninth resistor, a seventh resistor, a second diode, a first diode, a first logic chip and an eighth resistor; the power supply control module also includes a first relay;

[0022] Preferably, the anode of the second diode is connected to the third end of the first optocoupler through a ninth resistor, the cathode of the second diode is connected to the cathode of the first diode and the A end of the first logic chip, the B end of the first logic chip is connected to the emitter of the second switching tube through a seventh resistor, the F end of the first logic chip is connected to the anode of the first diode, one end of the first relay and the first end of the eighth resistor, the other end of the first relay is grounded, and the second end of the eighth resistor is connected to the backup power supply module.

[0023] As a further solution of the utility model: the backup power supply module includes a backup power supply, a first power tube and a first inverter;

[0024] Preferably, the first end of the backup power supply is connected to the drain of the first power tube, the source of the first power tube is connected to the first input end of the first inverter, the second input end of the first inverter and the second end of the backup power supply are both grounded, the first output end and the second output end of the first inverter are respectively connected to the first fixed end and the second fixed end of the first relay switch, and the gate of the first power tube is connected to the second end of the eighth resistor.

[0025] Compared with the prior art, the beneficial effects of the utility model are as follows: the power-off protection circuit of the vertical disinfection cabinet of the utility model can detect power-off of the power control module by the power-off detection module. When the disinfection work is started, and only after a period of disinfection, if a power outage occurs, the backup power supply control module will control the backup power supply module to perform backup power supply work, thereby avoiding the situation where the backup power supply module is powered on due to poor contact when the disinfection is started in a short time, increasing the use conditions of the backup power supply module, and extending the service life of the backup power supply module. At the same time, during the power supply of the backup power supply module, the power supply of the power control module will be disconnected to avoid the voltage influence caused by poor contact, thereby improving the safety of the vertical disinfection cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 The present invention provides a schematic block diagram of a power-off protection circuit for a vertical disinfection cabinet.

[0028] Figure 2 The present invention provides a circuit diagram of a power-off protection circuit for a vertical disinfection cabinet.

[0029] Figure 3 A connection circuit diagram of a backup power supply control module provided for an example of the present utility model. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In one embodiment, see Figure 1 , a vertical disinfection cabinet power-off protection circuit, comprising: a power control module 1, a power-off detection module 2, a disinfection control module 3, a disinfection module 4, a protection trigger module 5, a backup power supply control module 6 and a backup power supply module 7;

[0032] Specifically, the power control module 1 is connected to the backup power module 7 and the backup power supply control module 6, and is used to access and transmit AC power, to rectify, filter and stabilize the transmitted AC power and the power provided by the backup power module 7, and to receive the protection signal output by the backup power supply control module 6 and stop the transmission of AC power;

[0033] A power failure detection module 2, connected to the power control module 1, for isolating and detecting power failure of the rectified and filtered electric energy and outputting a first control signal when power failure occurs;

[0034] The disinfection control module 3 is connected to the power control module 1 and the disinfection module 4, and is used to receive the electric energy processed by the power control module 1 and output a second control signal at a regular time, and regularly transmit the AC electric energy transmitted by the power control module 1 to the disinfection module 4;

[0035] Disinfection module 4, used for disinfection;

[0036] A protection trigger module 5, connected to the disinfection control module 3, is used to receive the second control signal and perform energy storage, and is used to delay output of a third control signal when the stored electric energy reaches a set voltage threshold;

[0037] The backup power supply control module 6 is connected to the protection trigger module 5, the power-off detection module 2 and the backup power supply module 7, and is used to perform self-locking processing on the received first control signal and output a protection signal to control the backup power supply operation of the backup power supply module 7 and the power-off operation of the power supply control module 1 during the period of receiving the third control signal;

[0038] The backup power supply module 7 is used to provide auxiliary power, receive protection signals and invert the auxiliary power, and transmit the inverted power to the power supply control module 1 .

[0039] In a specific embodiment, the power control module 1 can adopt a power control circuit composed of a power interface, a relay, a rectifier, a voltage stabilizer, etc., can access AC power, and transmit, rectify, filter and stabilize the AC power; the power failure detection module 2 can adopt a power failure detection circuit composed of a photoelectric coupling, a resistor, etc. to isolate the power control module 1 for power failure detection; the disinfection control module 3 can adopt a disinfection control circuit composed of a relay, a disinfection time control device, etc., and the disinfection time control device can control the operation of the disinfection module 4 at a fixed time; the disinfection module 4 can adopt a disinfection device composed of a disinfection device. circuit to carry out disinfection; the protection trigger module 5 can use the protection trigger circuit composed of triode, capacitor and resistor to store energy for the signal output by the disinfection control module 3, and output a high-level protection signal after a short time; the backup power supply control module 6 can adopt a backup power supply control circuit composed of resistors, logic chips, etc., and when the power supply trigger module outputs a high-level signal and the power-off detection module 2 detects a power-off, it controls the power supply of the backup power supply module 7; the backup power supply module 7 can adopt a backup power supply circuit composed of a power tube, a backup power supply and an inverter to perform backup power supply and electric energy inversion processing.

[0040] In another embodiment, see Figure 1 , Figure 2 and Figure 3 , the power control module 1 includes a power interface, a first relay switch K1-1, a first rectifier T1, a first capacitor C1, a first regulator IC1 and a second capacitor C2;

[0041] Specifically, the first end and the second end of the power interface are respectively connected to the first moving end and the second moving end of the first relay switch K1-1, the first fixed end and the second fixed end of the first relay switch K1-1 are respectively connected to the first input end and the second input end of the first rectifier T1, the first output end of the first rectifier T1 is connected to one end of the first capacitor C1 and the third end of the first voltage regulator IC1, the second end of the first voltage regulator IC1 is connected to one end of the second capacitor C2, and the second output end of the first rectifier T1, the other end of the first capacitor C1, the first end of the first voltage regulator IC1 and the other end of the second capacitor C2 are all grounded.

[0042] In a specific embodiment, the first relay switch K1 - 1 may be a double-pole double-throw normally closed switch; the first rectifier T1 may be a full-wave rectifier; and the first voltage regulator IC1 may be a 7805 voltage regulator.

[0043] Furthermore, the power failure detection module 2 includes a first resistor R1, a first power source VCC1, a second resistor R2 and a first optical coupler U1;

[0044] Specifically, the first end of the first optocoupler U1 is connected to the first output end of the first rectifier T1 through the first resistor R1, the second end of the first optocoupler U1 is connected to the second output end of the first rectifier T1, the third end of the first optocoupler U1 is connected to the backup control module and connected to the first power supply VCC1 through the second resistor R2, and the fourth end of the first optocoupler U1 is grounded.

[0045] In a specific embodiment, the first optical coupler U1 may be a PC817 photoelectric coupler. When the first optical coupler U1 is turned off, the first power supply VCC1 and the second resistor R2 provide a high level signal.

[0046] Further, the disinfection control module 3 includes a disinfection time control device, a second relay K2, a first fuse FU1 and a second relay switch K2-1; the disinfection module 4 includes a disinfection device;

[0047] Specifically, the power supply end of the disinfection time control device is connected to the second end of the first voltage regulator IC1, the control end of the disinfection time control device is connected to the protection trigger module 5 and one end of the second relay K2, the other end of the second relay K2 is grounded, one end of the first fuse FU1 is connected to the first fixed end of the first relay switch K1-1, the other end of the first fuse FU1 is connected to the fixed end of the second relay switch K2-1, the moving end of the first fuse FU1 is connected to one end of the disinfection device, and the other end of the disinfection device is connected to the second fixed end of the first relay switch K1-1.

[0048] In a specific embodiment, the above-mentioned disinfection time control device may be composed of a processing chip and a clock chip, which are used to control the timing operation of the second relay K2, which will not be elaborated here; the above-mentioned second relay switch K2-1 may adopt a normally open switch, which is controlled by the second relay K2 by magnetic attraction; the above-mentioned disinfection device may adopt an ultraviolet lamp.

[0049] Furthermore, the protection trigger module 5 includes a third resistor R3, a first switch tube VT1, a third capacitor C3, a fifth resistor R5, a fourth resistor R4, a sixth resistor R6 and a second switch tube VT2;

[0050] Specifically, the collector of the first switch tube VT1 is connected to the collector of the second switch tube VT2 and is connected to the second end of the first regulator IC1 through the third resistor R3, the base of the first switch tube VT1 is connected to the control end of the disinfection time control device, the emitter of the first switch tube VT1 is connected to one end of the third capacitor C3 and one end of the fifth resistor R5 and is connected to the base of the second switch tube VT2 through the sixth resistor R6, the emitter of the second switch tube VT2 is connected to the backup power supply control module 6 and is grounded through the fourth resistor R4, and the other end of the third capacitor C3 and the other end of the fifth resistor R5 are both grounded.

[0051] In a specific embodiment, both the first switch tube VT1 and the second switch tube VT2 can be selected as NPN transistors; the third capacitor C3 stores electric energy, and when the stored electric energy exceeds the set voltage threshold after being divided by the fifth resistor R5 and the sixth resistor R6, that is, when the turn-on voltage of the second switch tube VT2 is reached, the second switch tube VT2 is turned on, and a high-level signal can be outputted on a regular basis.

[0052] Further, the backup power supply control module 6 includes a ninth resistor R9, a seventh resistor R7, a second diode D2, a first diode D1, a first logic chip U2 and an eighth resistor R8; the power supply control module 1 also includes a first relay K1;

[0053] Specifically, the anode of the second diode D2 is connected to the third end of the first optocoupler U1 through the ninth resistor R9, the cathode of the second diode D2 is connected to the cathode of the first diode D1 and the A end of the first logic chip U2, the B end of the first logic chip U2 is connected to the emitter of the second switch tube VT2 through the seventh resistor R7, the F end of the first logic chip U2 is connected to the anode of the first diode D1, one end of the first relay K1 and the first end of the eighth resistor R8, the other end of the first relay K1 is grounded, and the second end of the eighth resistor R8 is connected to the backup power supply module 7.

[0054] In a specific embodiment, the first logic chip U2 can be selected as an AND gate chip, and in conjunction with the second diode D2 and the first diode D1, the A end of the first logic chip U2 can be self-locked when the B end of the first logic chip U2 is at a high level; the first relay K1 controls the operation of the first relay switch K1-1 by magnetic attraction.

[0055] Further, the backup power module 7 includes a backup power supply, a first power tube Q1 and a first inverter T2;

[0056] Specifically, the first end of the backup power supply is connected to the drain of the first power tube Q1, the source of the first power tube Q1 is connected to the first input end of the first inverter T2, the second input end of the first inverter T2 and the second end of the backup power supply are both grounded, the first output end and the second output end of the first inverter T2 are respectively connected to the first fixed end and the second fixed end of the first relay switch K1-1, and the gate of the first power tube Q1 is connected to the second end of the eighth resistor R8.

[0057] In a specific embodiment, the backup power supply may be a battery; the first power tube Q1 may be an N-channel field effect tube.

[0058] In a power-off protection circuit of a vertical disinfection cabinet in the present embodiment, the power interface is connected to the mains, and AC power is connected and transmitted through the first relay switch K1-1. The first rectifier T1 performs rectification processing, and the first voltage stabilizer IC1, the first capacitor C1 and the second capacitor C2 perform voltage stabilization and filtering processing to supply power to the disinfection time control device. The disinfection time control device controls the second relay K2 to be energized in a timely manner, so that the second relay switch K2-1 is closed, and the disinfection device starts disinfection work. When the power interface is powered off, the first optical coupler U1 is cut off, and the first power supply VCC1 and the second resistor R2 provide a high-level signal to the A terminal of the first logic chip U2 through the ninth resistor R9 and the second diode D2. If the control end of the disinfection time control device has just started to control the second relay switch K2-1 to work, the power stored in the third capacitor C3 is low at this time, and the second switch tube VT2 cannot be triggered to turn on. After a power outage occurs, the disinfection work will also stop. At this time, the disinfection work has just started, and it can be manually determined whether the power outage is caused by poor contact of the power interface to avoid the backup power supply entering the backup power supply. If the control end of the disinfection time control device controls the second relay K2 to work for a period of time, and the third capacitor C3 triggers the second switch tube VT2 to turn on, the B end of the first logic chip U2 is in a high level state. At this time, if a power outage occurs, the F end of the first logic chip U2 will output a high level signal and control the first power tube Q1 to turn on, the first relay K1 is energized, the first relay switch K1-1 is disconnected, the backup power supply provides backup power and transmits it through the first power tube Q1, and the first inverter T2 is inverted to ensure stable power supply. At this time, the first optocoupler U1 is turned on, and the disinfection time control device works normally, but due to the signal transmission of the first diode D1 and the second diode D2, the first logic chip U2 maintains a high level output until the third capacitor C3 cannot trigger the second switch tube VT2 to turn on.

[0059] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0060] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A power-off protection circuit for a vertical disinfection cabinet, characterized in that: The power-off protection circuit of the vertical disinfection cabinet comprises: a power control module, a power-off detection module, a disinfection control module, a disinfection module, a protection trigger module, a backup power supply control module and a backup power supply module; The power control module is connected to the backup power module and the backup power supply control module, and is used to access and transmit AC power, to rectify, filter and stabilize the transmitted AC power and the power provided by the backup power module, and to receive the protection signal output by the backup power supply control module and stop the transmission of AC power; The power failure detection module is connected to the power control module and is used to perform power failure detection on the rectified and filtered electric energy and output a first control signal when the power is off; The disinfection control module is connected to the power control module and the disinfection module, and is used to receive the electric energy processed by the power control module and output a second control signal at a regular time, and regularly transmit the AC electric energy transmitted by the power control module to the disinfection module; The disinfection module is used to perform disinfection work; The protection trigger module is connected to the disinfection control module, and is used to receive the second control signal and perform energy storage, and is used to delay output of the third control signal when the stored electric energy reaches a set voltage threshold; The backup power supply control module is connected to the protection trigger module, the power-off detection module and the backup power supply module, and is used to perform self-locking processing on the received first control signal and output a protection signal to control the backup power supply operation of the backup power supply module and the power-off operation of the power supply control module during the period of receiving the third control signal; The backup power supply module is used to provide auxiliary electric energy, to receive a protection signal and to invert the auxiliary electric energy, and to transmit the inverted electric energy to the power supply control module.

2. A power-off protection circuit for a vertical disinfection cabinet according to claim 1, characterized in that: The power control module includes a power interface, a first relay switch, a first rectifier, a first capacitor, a first voltage stabilizer and a second capacitor; The first end and the second end of the power interface are respectively connected to the first moving end and the second moving end of the first relay switch, the first fixed end and the second fixed end of the first relay switch are respectively connected to the first input end and the second input end of the first rectifier, the first output end of the first rectifier is connected to one end of the first capacitor and the third end of the first voltage regulator, the second end of the first voltage regulator is connected to one end of the second capacitor, and the second output end of the first rectifier, the other end of the first capacitor, the first end of the first voltage regulator and the other end of the second capacitor are all grounded.

3. A power-off protection circuit for a vertical disinfection cabinet according to claim 2, characterized in that: The power-off detection module includes a first resistor, a first power supply, a second resistor and a first optical coupler; The first end of the first optocoupler is connected to the first output end of the first rectifier through the first resistor, the second end of the first optocoupler is connected to the second output end of the first rectifier, the third end of the first optocoupler is connected to the backup control module and to the first power supply through the second resistor, and the fourth end of the first optocoupler is grounded.

4. A power-off protection circuit for a vertical disinfection cabinet according to claim 3, characterized in that: The disinfection control module includes a disinfection time control device, a second relay, a first fuse and a second relay switch; the disinfection module includes a disinfection device; The power supply end of the disinfection time control device is connected to the second end of the first voltage stabilizer, the control end of the disinfection time control device is connected to the protection trigger module and one end of the second relay, the other end of the second relay is grounded, one end of the first fuse is connected to the first fixed end of the first relay switch, the other end of the first fuse is connected to the fixed end of the second relay switch, the moving end of the first fuse is connected to one end of the disinfection device, and the other end of the disinfection device is connected to the second fixed end of the first relay switch.

5. A power-off protection circuit for a vertical disinfection cabinet according to claim 4, characterized in that: The protection trigger module includes a third resistor, a first switch tube, a third capacitor, a fifth resistor, a fourth resistor, a sixth resistor and a second switch tube; The collector of the first switch tube is connected to the collector of the second switch tube and is connected to the second end of the first regulator through the third resistor, the base of the first switch tube is connected to the control end of the disinfection time control device, the emitter of the first switch tube is connected to one end of the third capacitor and one end of the fifth resistor and is connected to the base of the second switch tube through the sixth resistor, the emitter of the second switch tube is connected to the backup power supply control module and is grounded through the fourth resistor, and the other end of the third capacitor and the other end of the fifth resistor are both grounded.

6. A power-off protection circuit for a vertical disinfection cabinet according to claim 5, characterized in that: The backup power supply control module includes a ninth resistor, a seventh resistor, a second diode, a first diode, a first logic chip and an eighth resistor; the power supply control module also includes a first relay; The anode of the second diode is connected to the third end of the first optocoupler through the ninth resistor, the cathode of the second diode is connected to the cathode of the first diode and the A end of the first logic chip, the B end of the first logic chip is connected to the emitter of the second switch tube through the seventh resistor, the F end of the first logic chip is connected to the anode of the first diode, one end of the first relay and the first end of the eighth resistor, the other end of the first relay is grounded, and the second end of the eighth resistor is connected to the backup power supply module.

7. A power-off protection circuit for a vertical disinfection cabinet according to claim 6, characterized in that: The backup power supply module includes a backup power supply, a first power tube and a first inverter; The first end of the backup power supply is connected to the drain of the first power tube, the source of the first power tube is connected to the first input end of the first inverter, the second input end of the first inverter and the second end of the backup power supply are both grounded, the first output end and the second output end of the first inverter are respectively connected to the first fixed end and the second fixed end of the first relay switch, and the gate of the first power tube is connected to the second end of the eighth resistor.

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