Door lock and intelligent vending refrigerator

Abstract

The application relates to a door lock and an intelligent vending refrigerator, and belongs to the technical field of refrigeration and freezing equipment. The door lock comprises a lock hook, a lock body, a lock bolt position monitoring assembly, a temperature sensor, a heating element and a control circuit board; the lock body comprises a lock shell and a lock core; the internal space of the lock shell is divided into a lock core area and a lock hook connecting area, the lock core is installed in the lock core area, the lock core comprises a lock bolt which linearly reciprocates between a locking position and an unlocking position; the lock bolt position monitoring assembly is used for monitoring the position of the lock bolt to judge the locking and unlocking state; the temperature sensor is installed in the lock core area and is used for monitoring the temperature of the lock core; the heating element is arranged in the lock core area and is used for heating the lock core; the control circuit board is provided with a processor used for controlling the movement of the lock bolt, and the processor is electrically connected with the lock bolt position monitoring assembly, the heating element and the temperature sensor. The door lock can effectively avoid the frost problem of the lock bolt, can be installed in a cabinet for use, and is high in safety.

Description

Technical Field

[0001] This invention belongs to the technical field of refrigeration and freezing equipment, and particularly relates to a door lock and an intelligent vending refrigerator. Background Technology

[0002] In recent years, unmanned smart vending machines have met people's pursuit of flexible, convenient and fast shopping experiences, becoming a new retail trend. In particular, refrigerated smart vending machines have been widely used in supermarkets and shopping malls.

[0003] For smart vending refrigerated display cases, to ensure the safety of the case in unmanned environments and to prevent theft of goods, door locks are usually installed to control the opening and closing of the door. Currently, the door locks of existing smart vending refrigerated display cases are usually located on the light box on the top of the case or on the lower front cover, both on the outside of the case. Due to their conspicuous and exposed location, the door locks are easily maliciously damaged or accidentally destroyed, resulting in poor security. While it's possible to install the door lock inside the case to prevent human damage, the interior is prone to frost buildup, which can cause the lock tongue to become frost-covered and unable to open.

[0004] Therefore, improving the security of door locks for smart vending machines is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a door lock and an intelligent vending refrigerator. This door lock can effectively prevent frost buildup on the lock tongue, can be installed inside the refrigerator, and offers high security.

[0006] This invention provides a door lock, comprising:

[0007] Lock hook;

[0008] The lock body includes a lock shell and a lock cylinder. The internal space of the lock shell is divided into a lock cylinder area and a lock hook connection area. The lock shell has a lock opening that communicates with the lock hook connection area so that the lock hook can extend into the lock hook connection area. The lock cylinder is installed in the lock cylinder area and includes a bolt that reciprocates linearly between a locked position and an unlocked position. When the bolt moves to the locked position, one end of the bolt extends into the lock hook connection area to lock with the lock hook. When the bolt moves to the unlocked position, the bolt retracts into the lock cylinder area to unlock.

[0009] A bolt position monitoring component is used to monitor the bolt position to determine the lock's open / closed status;

[0010] Temperature sensor, installed in the lock cylinder area, is used to monitor the temperature of the lock cylinder;

[0011] A heating element is located within the lock cylinder area and is used to heat the lock cylinder.

[0012] The control circuit board is equipped with a processor for controlling the movement of the bolt. The processor is electrically connected to the bolt position monitoring component, the heating element, and the temperature sensor. The processor is configured to: when the processor controls the bolt to move to the unlock position, but the bolt position monitoring component does not detect the unlock state, determine whether the temperature monitored by the temperature sensor is lower than the preset temperature, and control the heating element to heat the lock cylinder when the temperature monitored by the temperature sensor is lower than the preset temperature.

[0013] In some embodiments, the lock cylinder further includes an electromagnet, and the bolt is fitted inside the electromagnet; the processor is electrically connected to the coil of the electromagnet, and the processor is configured to: control the coil to be energized when an unlocking command is received, so that the bolt moves to the unlocking position under the magnetic force generated by the energized coil; and control the coil to be de-energized when a locking command is received, so that the bolt moves to the locking position.

[0014] In some embodiments, the door lock further includes a door body connector, a lock hook is installed on the door body connector, and the door body connector is also equipped with an RFID chip; the control circuit board is configured with an RFID sensor that generates a sensing signal with the RFID chip, and the processor is electrically connected to the RFID sensor; when the RFID sensor generates a sensing signal with the RFID chip, the RFID sensor outputs a locking command to the processor.

[0015] In some embodiments, the heating element is a coil, and the processor has a PWM output terminal and is connected to the coil of the electromagnet through the PWM output terminal; the processor is configured to: when the processor determines that the temperature monitored by the temperature sensor is lower than a preset temperature, the processor increases the PWM duty cycle of the output to increase the current of the coil to heat the lock cylinder.

[0016] In some embodiments, the heating element includes a heating wire coiled around an electromagnet, and the processor is configured to control the heating wire to be energized to heat the lock cylinder when the processor determines that the temperature monitored by the temperature sensor is lower than a preset temperature.

[0017] In some embodiments, the bolt position monitoring component includes a blocking member and a photoelectric sensor. The blocking member is installed on the bolt to move with the bolt, and the photoelectric sensor is disposed in the lock cylinder area. When the bolt moves to the locked position, the blocking member is located in the optical path of the photoelectric sensor to cut off the photoelectric sensor's light sensing signal as a locked state signal. When the bolt leaves the locked position, the blocking member leaves the optical path of the photoelectric sensor to restore the light sensing signal as an unlocked state signal.

[0018] In some embodiments, the door lock further includes a hook positioning monitoring component, which includes a magnet and a magnetic sensor. The magnet is disposed within the hook, and the magnetic sensor is disposed within the lock cylinder area. When the hook is fully extended into the hook connection area, the magnetic sensor and the magnet approach each other to generate a magnetic induction signal as the hook positioning signal. When the hook leaves the hook connection area, the magnetic sensor and the magnet move away from each other to make the magnetic induction signal disappear. The processor is configured to: upon receiving a locking command, determine whether the photoelectric sensor detects a locking status signal and whether the magnetic sensor detects a hook positioning signal; when the processor receives both the locking status signal detected by the photoelectric sensor and the hook positioning signal detected by the magnetic sensor, determine that the door is properly locked; otherwise, determine that the door is not properly locked; when the door is determined to be not properly locked, the processor issues an alarm signal.

[0019] In some embodiments, a seal is provided between the outer periphery of the latch and the lock housing, the seal dividing the lock cylinder into a sealed area that is sealed and isolated from the lock hook connection area and a non-sealed area that is connected to the lock hook connection area, with the electromagnet located in the sealed area.

[0020] In some embodiments, a partition block is provided inside the lock housing, which divides the lock housing into a lock cylinder area and a lock hook connection area. The partition block has a through hole for the lock tongue to pass through. A seal is located inside the lock cylinder area. One end of the seal is fitted around the outer periphery of the lock tongue, and the other end is fitted around the side of the partition block facing the lock cylinder area. The seal is made of a flexible material and expands and contracts with the reciprocating movement of the lock tongue.

[0021] In addition, the present invention also provides an intelligent vending refrigerator, including a cabinet body and a cabinet door connected to the cabinet body. A door lock as described in any of the above technical solutions is provided between the cabinet body and the cabinet door. The lock body is installed on the cabinet body and located on the inner wall of the cabinet body facing the storage space, and the lock hook is correspondingly installed on the cabinet door.

[0022] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0023] 1. The door lock provided by this invention has the locking position of the bolt and the hook located in the hook connection area inside the lock case. When the bolt and the hook are locked, the bolt does not need to extend outside the lock case, avoiding the bolt being exposed to the external space. When installed inside a freezer, this reduces the contact between the bolt and the cold air inside the freezer, reducing the risk of frost formation on the bolt. This allows it to be installed inside the freezer with high security. At the same time, by using a processor, temperature sensor, and bolt position monitoring component, the heating element can be controlled to heat the lock cylinder when the bolt is frozen, thereby defrosting the lock cylinder and removing the obstruction to unlocking, thus ensuring the normal operation of the door lock.

[0024] 2. The intelligent vending refrigerator provided by this invention has its door lock installed inside the cabinet, which is highly concealed and secure. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0026] Figure 1 This is a schematic diagram of the structure of a door lock according to an embodiment of the present invention in the locked state;

[0027] Figure 2 For along Figure 1 Sectional view of line AA in the middle;

[0028] Figure 3 This is a schematic diagram of the structure of a door lock according to an embodiment of the present invention in the unlocked state;

[0029] Figure 4 This is a block diagram illustrating the control principle of the processor, temperature sensor, photoelectric sensor, magnetic sensor, RFID sensor, and electromagnet in one embodiment of the door lock of the present invention.

[0030] Figure 5 This is a schematic diagram of the processor interface in one embodiment of the door lock of the present invention;

[0031] Figure 6 This is a circuit diagram illustrating the control of a temperature sensor in one embodiment of the door lock of the present invention.

[0032] Figure 7 This is a circuit diagram illustrating the control of the electromagnet in one embodiment of the door lock of the present invention;

[0033] Figure 8 This is a circuit diagram illustrating the control of a photoelectric sensor in one embodiment of the door lock of the present invention;

[0034] Figure 9 This is a circuit diagram illustrating the control of the magnetic sensor in one embodiment of the door lock of the present invention;

[0035] Figure 10 This is a schematic diagram of the lock body structure in another embodiment of the door lock of the present invention;

[0036] Figure 11 This is a schematic diagram of the assembly structure of the heating wire and the electromagnet in another embodiment of the door lock of the present invention;

[0037] Figure 12 This is a structural schematic diagram of one embodiment of the intelligent vending refrigerator of the present invention.

[0038] In the picture:

[0039] 1. Door lock; 2. Cabinet body; 3. Cabinet door;

[0040] 11. Lock hook; 12. Lock body; 13. Control circuit board; 14. Lock tongue position monitoring component; 15. Temperature sensor; 16. RFID sensor; 17. Processor; 18. Lock hook position monitoring component; 19. Door body connector; 20. RFID chip;

[0041] 121. Lock case; 122. Lock cylinder; 1221. Lock tongue; 1222. Electromagnet; 123. Divider block; 124. Seal; 125. Heating wire;

[0042] 141. Obstruction component; 142. Photoelectric sensor;

[0043] 181. Magnet; 182. Magnetic sensor;

[0044] a. Lock cylinder area; b. Lock hook connection area. Detailed Implementation

[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0046] In the description of this invention, it should be understood that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0047] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] like Figures 1-4As shown, in an illustrative embodiment of the door lock 1 of the present invention, the door lock 1 includes a lock hook 11, a lock body 12, a bolt position monitoring assembly 14, a temperature sensor 15, a heating element, and a control circuit board 13; the lock body 12 includes a lock shell 121 and a lock cylinder 122; the internal space of the lock shell 121 is divided into a lock cylinder area a and a lock hook connection area b, and the lock shell 121 has a lock opening communicating with the lock hook connection area b, so that the lock hook 11 can extend into the lock hook connection area b; the lock cylinder 122 is installed in the lock cylinder area a, and the lock cylinder 122 includes a locked position and an unlocked position. The bolt 1221 reciprocates linearly between positions; when the bolt 1221 moves to the locked position, one end of the bolt 1221 extends into the lock hook connection area b to lock with the lock hook 11; when the bolt 1221 moves to the unlocked position, the bolt 1221 retracts into the lock cylinder area a to unlock; the bolt position monitoring component 14 is used to monitor the position of the bolt 1221 to determine the lock / unlock status; the temperature sensor 15 is installed in the lock cylinder area a to monitor the temperature of the lock cylinder 122; the heating element is set in the lock cylinder area a to heat the lock cylinder 122; control Circuit board 13 is equipped with a processor 17 for controlling the movement of the bolt 1221. The processor 17 is electrically connected to the bolt position monitoring component 14, the heating element, and the temperature sensor 15. The processor 17 is configured such that when the processor 17 controls the bolt 1221 to move towards the unlocked position, but the bolt position monitoring component 14 does not detect the unlocked state (it should be noted that if the bolt 1221 is not frozen due to frost, the bolt position monitoring component 14 can normally detect the unlocking state after the processor 17 controls the bolt 1221 to move towards the unlocked position). Therefore, when the latch position monitoring component 14 does not detect the unlocking status signal, it can be determined that the latch 1221 may be frozen due to frost, resulting in an unlocking obstruction. It can also determine whether the temperature monitored by the temperature sensor 15 is lower than the preset temperature (it should be noted that, based on experience, when the temperature is lower than -15℃, the frost phenomenon inside the cabinet is obvious, which may cause the latch 1221 to frost. Therefore, in this embodiment, the preset temperature is set to -15℃). When the temperature monitored by the temperature sensor 15 is lower than the preset temperature, the heating element is controlled to heat the lock cylinder 122.

[0049] In the aforementioned door lock 1, the locking position of the bolt 1221 and the hook 11 is located in the hook connection area b inside the lock housing 121. When the bolt 1221 and the hook 11 are locked, the bolt 1221 does not need to extend outside the lock housing 121, thus avoiding the bolt 1221 being exposed to the external space. When installed inside the freezer, this reduces the contact between the bolt 1221 and the cold air inside the freezer, reducing the risk of frost formation on the bolt 1221. This allows it to be installed and used inside the freezer with high security. At the same time, through the cooperation of the processor 17, temperature sensor 15, and bolt position monitoring component 14, when the bolt 1221 is frosted and frozen, the heating element can be controlled to heat the lock cylinder 122 to defrost the position of the lock cylinder 122, thereby removing the obstruction to unlocking and ensuring the normal operation of the door lock 1.

[0050] It should be noted that in this embodiment, the processor 17 uses an existing MCU chip, and its interface diagram is shown below. Figure 5 As shown, the NTC interface is used to connect the temperature sensor 15. The temperature sensor 15 is a standard model temperature sensor. The circuit diagram of the MCU chip controlling the temperature sensor 15 is shown below. Figure 6 As shown.

[0051] like Figure 1 , Figure 3 and Figure 4 As shown, in order to facilitate the control of the reciprocating movement of the bolt 1221, in this embodiment, the lock cylinder 122 also includes an electromagnet 1222, and the bolt 1221 is sleeved inside the electromagnet 1222; the processor 17 is electrically connected to the coil of the electromagnet 1222, and the processor 17 is configured to: control the coil to be energized when an unlocking command is received, so that the bolt 1221 moves to the unlocking position under the magnetic force generated by the energized coil; and control the coil to be de-energized when a locking command is received, so that the bolt 1221 moves to the locking position.

[0052] like Figure 1 , Figure 3 and Figure 4 As shown, to avoid the problem of lock fraud, in this embodiment, the door lock 1 also includes a door body connector 19, a lock hook 11 is installed on the door body connector 19, and an RFID chip 20 is also installed on the door body connector 19; the control circuit board 13 is configured with an RFID sensor 16 that generates a sensing signal with the RFID chip 20, and the processor 17 is electrically connected to the RFID sensor 16; when the RFID sensor 16 generates a sensing signal with the RFID chip 20, the RFID sensor 16 outputs a locking command to the processor 17. It should be noted that using the RFID chip 20 to control the locking command is an existing technology used in intelligent vending machines, such as patent CN111305655A, and the specific working process will not be described in detail here. It should be noted that, as Figure 5 As shown, the RPI interface of the MCU chip is the interface for connecting the RFID sensor chip 16.

[0053] like Figure 5 and Figure 6As shown, in this embodiment, the heating element is a coil. The processor 17 has a PWM output terminal and is connected to the coil of the electromagnet 1222 through the PWM output terminal. The processor 17 is configured to increase the PWM duty cycle of the output to increase the current of the coil when the temperature monitored by the temperature sensor 15 is lower than the preset temperature, so as to heat the lock cylinder 122. It should be noted that the working principle of the electromagnet 1222 is that the energized coil generates a magnetic attraction force, which drives the iron lock tongue 1221 to move. The larger the current, the stronger the magnetic force generated. Therefore, if the lock tongue 1221 fails to move effectively, by increasing the coil current, the coil will generate eddy currents, thereby generating a large amount of heat. This heat can be conducted to the frozen part of the lock tongue 1221 through the electromagnet 1222, achieving the defrosting and melting effect. Therefore, in this embodiment, the coil of the electromagnet 1222 is used both to control the movement of the lock tongue 1221 through electromagnetic action and to heat the lock cylinder 122 when the lock tongue 1221 is frozen, without the need for a separate heating element. It should also be noted that the electromagnet 1222 coil has a set maximum operating temperature. If the detected temperature exceeds the set maximum operating temperature, the defrosting process is paused. The defrosting process resumes only after the electromagnet 1222 returns to its normal operating temperature, continuing until the latch 1221 is defrosted. Furthermore, it should be noted that PWM (Pulse Width Modulation) is a current technology that uses a drive transistor to supply power to the load at a certain frequency and duty cycle, adjusting power through integral effects. For example... Figure 5 As shown, the LOCK_W interface of the MCU chip is the PWM output terminal. Figure 7 The control circuit principle of the electromagnet 1222 controlled by the PWM signal in this embodiment is shown.

[0054] like Figures 1-3 As shown, in this embodiment, the bolt position monitoring component 14 includes a blocking member 141 and a photoelectric sensor 142. The blocking member 141 is installed on the bolt 1221 to move with the bolt 1221. The photoelectric sensor 142 is disposed in the lock cylinder area a. When the bolt 1221 moves to the locked position, the blocking member 141 is located in the optical path of the photoelectric sensor 142 to cut off the photosensitive signal of the photoelectric sensor 142 as a locked state signal. When the bolt 1221 leaves the locked position, the blocking member 141 leaves the optical path of the photoelectric sensor 142 to restore the photosensitive signal as an unlocked state signal. It should be noted that, as Figure 5 As shown, the LOOK1 interface of the MCU chip is the interface for connecting the photoelectric sensor 142. The photoelectric sensor 142 adopts an existing model photoelectric sensor. The circuit schematic diagram of the MCU chip controlling the photoelectric sensor 142 is shown below. Figure 8 As shown.

[0055] like Figure 1 and Figure 4As shown, to ensure the lock is fully engaged, in this embodiment, the door lock 1 further includes a lock hook engagement monitoring component 18. The lock hook engagement monitoring component 18 includes a magnet 181 and a magnetic sensor 182. The magnet 181 is disposed within the lock hook 11, and the magnetic sensor 182 is disposed within the lock cylinder area a. When the lock hook 11 is fully extended into the lock hook connection area b, the magnetic sensor 182 and the magnet 181 move closer together to generate a magnetic induction signal as the lock hook 11 engagement signal. When the lock hook 11 leaves the lock hook connection area b, the magnetic sensor 182 and the magnet 181 move further apart. To make the magnetic induction signal disappear; the processor 17 is configured to: when the processor 17 receives a locking command, determine whether the photoelectric sensor 142 detects a locking status signal and whether the magnetic sensor 182 detects a lock hook 11 in position signal; when the processor 17 receives the locking status signal detected by the photoelectric sensor 142 and the lock hook 11 in position signal detected by the magnetic sensor 182, it determines that the lock is in place; otherwise, it determines that the lock is not in place; when it is determined that the lock is not in place, the processor 17 issues an alarm signal. In this embodiment, the lock tongue position monitoring component 14 can monitor whether the lock tongue 1221 has reached the locked position, and the lock hook position monitoring component 18 can monitor whether the lock hook 11 is in place. The two work together to ensure that the lock is in place. It should be noted that, as Figure 5 As shown, the CIGAN interface of the MCU chip is the interface for connecting the magnetic sensor 182. The magnetic sensor 182 adopts an existing model of magnetic sensor. The circuit schematic diagram of the MCU chip controlling the magnetic sensor 182 is shown below. Figure 9 As shown.

[0056] like Figure 3 As shown, in order to prevent moisture inside the cabinet from entering the lock cylinder 122 and affecting the operation of the electromagnet 1222 inside the lock cylinder 122, in this embodiment, a sealing element 124 is provided between the outer periphery of the lock tongue 1221 and the lock shell 121. The sealing element 124 divides the lock cylinder area a into a sealed area that is sealed and isolated from the lock hook connection area b and a non-sealed area that is connected to the lock hook connection area b. The electromagnet 1222 is located in the sealed area.

[0057] Specifically, such as Figure 3As shown, a partition block 123 is provided inside the lock housing 121, dividing the lock housing 121 into a lock cylinder area a and a lock hook connection area b. The partition block 123 has a through hole for the bolt 1221 to pass through. A sealing member 124 is located inside the lock cylinder area a. One end of the sealing member 124 is fitted around the outer periphery of the bolt 1221, and the other end is fitted around the side of the partition block 123 facing the lock cylinder area a. The sealing member 124 is made of flexible material and expands and contracts with the reciprocating movement of the bolt 1221. In this embodiment, the partition block 123 facilitates the separation of the lock cylinder area a and the lock hook connection area b. The through hole in the partition block 123 restricts the movement direction of the bolt 1221. At the same time, the partition block 123 facilitates the installation of the sealing member 124. It should be noted that the sealing member 124 in this embodiment is specifically a corrugated sealing ring.

[0058] like Figure 10 and Figure 11 As shown, in another illustrative embodiment of the door lock 1 of the present invention, the heating element includes a heating wire 125 coiled around an electromagnet 1222. The processor 17 is configured to: when the processor 17 determines that the temperature monitored by the temperature sensor 15 is lower than a preset temperature, the processor 17 controls the heating wire 125 to be energized to heat the lock cylinder 122. This embodiment uses a separately provided heating wire 125 as the heating element, which facilitates heating the lock cylinder 122 and avoids the maximum operating temperature limitation that exists when using an electromagnet 1222 coil as the heating element. It should be noted that, as... Figure 11 As shown, in order to facilitate the installation of the heating wire 125, in this embodiment, the outer surface of the housing of the electromagnet 1222 is provided with a groove for the heating wire 125 to be embedded.

[0059] Based on the aforementioned door lock 1, the present invention also provides an intelligent vending refrigerator. For example... Figure 12 As shown, the intelligent vending refrigerator includes a cabinet body 2 and a cabinet door 3 connected to the cabinet body 2. A door lock 1 is installed between the cabinet body 2 and the cabinet door 3. The lock body 12 is installed on the inner wall of the cabinet body 2 on the side facing the storage space, and the lock hook 11 is correspondingly installed on the cabinet door 3. This intelligent vending refrigerator features a door lock 1 installed inside the cabinet, offering strong concealment and high security.

[0060] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0061] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A door lock, characterized in that, include: Lock hook; The lock body includes a lock shell and a lock cylinder; the internal space of the lock shell is divided into a lock cylinder area and a lock hook connection area, and the lock shell has a lock opening communicating with the lock hook connection area, so that the lock hook can extend into the lock hook connection area; the lock cylinder is installed in the lock cylinder area, and the lock cylinder includes a bolt that reciprocates linearly between a locked position and an unlocked position; when the bolt moves to the locked position, one end of the bolt extends into the lock hook connection area to lock with the lock hook; when the bolt moves to the unlocked position, the bolt retracts into the lock cylinder area to unlock; A bolt position monitoring component is used to monitor the bolt position to determine the lock / unlock status; A temperature sensor is installed in the lock cylinder area to monitor the temperature of the lock cylinder; A heating element is disposed within the lock cylinder area and is used to heat the lock cylinder; A control circuit board is provided, which is equipped with a processor for controlling the movement of the bolt. The processor is electrically connected to the bolt position monitoring component, the heating element, and the temperature sensor. The processor is configured to: when the processor controls the bolt to move toward the unlock position, but the bolt position monitoring component does not detect the unlock state, determine whether the temperature monitored by the temperature sensor is lower than a preset temperature, and when the temperature monitored by the temperature sensor is lower than the preset temperature, control the heating element to heat the lock cylinder.

2. The door lock according to claim 1, characterized in that, The lock cylinder also includes an electromagnet, and the bolt is fitted inside the electromagnet; the processor is electrically connected to the coil of the electromagnet, and the processor is configured to: control the coil to be energized when an unlocking command is received, so that the bolt moves to the unlocking position under the magnetic force generated by the energized coil; and control the coil to be de-energized when a locking command is received, so that the bolt moves to the locking position.

3. The door lock according to claim 2, characterized in that, The door lock also includes a door body connector, the lock hook is installed on the door body connector, and the door body connector is also equipped with an RFID chip; the control circuit board is configured with an RFID sensor that generates a sensing signal with the RFID chip, and the processor is electrically connected to the RFID sensor; when the RFID sensor generates a sensing signal with the RFID chip, the RFID sensor outputs a locking command to the processor.

4. The door lock according to claim 2 or 3, characterized in that, The heating element is the coil, and the processor has a PWM output terminal connected to the coil of the electromagnet through the PWM output terminal; the processor is configured to: when the processor determines that the temperature monitored by the temperature sensor is lower than a preset temperature, the processor increases the output PWM duty cycle to increase the current of the coil in order to heat the lock core.

5. The door lock according to claim 2 or 3, characterized in that, The heating element includes a heating wire coiled around the electromagnet, and the processor is configured to: when the processor determines that the temperature monitored by the temperature sensor is lower than a preset temperature, the processor controls the heating wire to be energized to heat the lock cylinder.

6. The door lock according to claim 1, characterized in that, The bolt position monitoring component includes a blocking member and a photoelectric sensor. The blocking member is installed on the bolt to move with it. The photoelectric sensor is located in the lock cylinder area. When the bolt moves to the locked position, the blocking member is positioned in the optical path of the photoelectric sensor to cut off the photoelectric sensor's light sensing signal as a locked state signal. When the bolt leaves the locked position, the blocking member leaves the optical path of the photoelectric sensor to restore the light sensing signal as an unlocked state signal.

7. The door lock according to claim 6, characterized in that, The door lock also includes a hook positioning monitoring component, which includes a magnet and a magnetic sensor. The magnet is disposed within the hook, and the magnetic sensor is disposed within the lock cylinder area. When the hook is fully extended into the hook connection area, the magnetic sensor and the magnet move closer together to generate a magnetic induction signal as the hook positioning signal. When the hook leaves the hook connection area, the magnetic sensor and the magnet move further apart to eliminate the magnetic induction signal. The processor is configured to: upon receiving a locking command, determine whether the photoelectric sensor detects the locking status signal and whether the magnetic sensor detects the hook positioning signal; when the processor receives the locking status signal detected by the photoelectric sensor and the hook positioning signal detected by the magnetic sensor, determine that the lock is in place; otherwise, determine that the lock is not in place; when the lock is not in place, the processor issues an alarm signal.

8. The door lock according to claim 2, characterized in that, A sealing element is provided between the outer periphery of the latch and the lock housing. The sealing element divides the lock cylinder into a sealed area that is sealed and isolated from the lock hook connection area and a non-sealed area that is connected to the lock hook connection area. The electromagnet is located in the sealed area.

9. The door lock according to claim 8, characterized in that, The lock housing is provided with a partition block, which divides the lock housing into the lock cylinder area and the lock hook connection area. The partition block has a through hole for the lock tongue to pass through. The sealing element is located in the lock cylinder area. One end of the sealing element is sleeved on the outer periphery of the lock tongue, and the other end is sleeved on the side of the partition block facing the lock cylinder area. The sealing element is made of flexible material and expands and contracts with the reciprocating movement of the lock tongue.

10. An intelligent vending refrigerator, comprising a cabinet body and a cabinet door connected to the cabinet body, characterized in that, A door lock according to any one of claims 1-9 is provided between the cabinet body and the cabinet door, wherein the lock body is installed on the cabinet body and located on the inner wall of the cabinet body facing the storage space, and the lock hook is correspondingly installed on the cabinet door.

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