Door lock with defrosting function and intelligent vending refrigerator
By integrated frosting function in the door lock of the smart sales cold cabinet, the temperature sensor and heating parts are used to prevent frosting tongue lock, which solves the problem of poor security and lock tongue cream. Sexual and concealed door lock design.
Patent Information
- Application Number
- CN202421069525.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-05-16
AI Technical Summary
The door locks of existing smart sales refrigerators are easily maliciously damaged or accidentally damaged due to their conspicuous and exposed location, which has poor safety; at the same time, if the door lock is set inside the refrigerator, there is a problem of frosting the lock tongue, causing the door lock function to fail. .
A door lock with defrost function is designed, including a lock hook, a lock body, a temperature sensor, a heating element and a control circuit board. The temperature is monitored through the temperature sensor and the heating element is controlled to heat the lock core to avoid frost on the lock tongue. This ensures that the door lock operates properly.
The door lock can be installed inside the cold cabinet. It has strong concealment and high security. It avoids the problem of failure of the door lock function caused by the lock tongue and ensures the normal operation and high security of the door lock.
Smart Images
Figure CN222391208U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of refrigeration and freezing equipment, and in particular relates to a door lock with a defrosting function and an intelligent vending refrigerator. Background Art
[0002] In recent years, unmanned smart vending machines have met people's pursuit of flexible, convenient and fast shopping experiences, becoming a new retail hotspot. In particular, smart vending machines in the form of refrigerators have been widely used in supermarkets.
[0003] For smart vending refrigerators, in order to ensure the safety of the refrigerators in unmanned vending environments and to prevent theft of goods, door locks are usually equipped to control the opening and closing status of the door. At present, the door locks of existing smart vending refrigerators are usually set on the light box on the top of the refrigerator or on the lower front cover at the bottom, both of which are outside the refrigerator. Due to the conspicuous and exposed position, the door locks are easily damaged by malicious or accidental damage, and the safety is poor. If the door lock is considered to be set inside the refrigerator to avoid human damage, however, since frost is easy to form inside the cabinet, there is a problem that the lock tongue is frosted and the door lock function fails. Utility Model Content
[0004] In view of the poor security problem of existing door locks for smart vending refrigerators, the utility model provides a door lock with a defrosting function and a smart vending refrigerator. The door lock has a defrosting function, which can avoid the problem of frosting on the lock tongue, can be installed in the cabinet for use, and has high security.
[0005] The utility model provides a door lock with a defrosting function, comprising:
[0006] Lock hook;
[0007] The lock body includes a lock shell and a lock core; the inner space of the lock shell is divided into a lock core area and a lock hook connection area, and the lock shell is provided with a lock opening connected to the lock hook connection area so that the lock hook can be inserted into the lock hook connection area; the lock core is installed in the lock core area, and the lock core includes a lock tongue that performs linear reciprocating motion between a locking position and an unlocking position; when the lock tongue moves to the locking position, one end of the lock tongue extends into the lock hook connection area to lock with the lock hook; when the lock tongue moves to the unlocking position, the lock tongue retracts into the lock core area to unlock;
[0008] Temperature sensor: The temperature sensor is installed in the lock core area to monitor the temperature of the lock core;
[0009] A heating element, which is arranged in the lock core area and is used to heat the lock core;
[0010] A control circuit board is provided with a processor, and the processor is electrically connected to the heating element and the temperature sensor respectively, so as to control the heating element to heat the lock cylinder when the temperature monitored by the temperature sensor is lower than a preset temperature.
[0011] In some embodiments, the lock core also includes an electromagnet, and the lock tongue is arranged inside the electromagnet; the processor is electrically connected to the coil of the electromagnet to control the on and off of the coil, so that the lock tongue performs linear reciprocating motion under the control of the magnetic force generated by the on and off of the coil.
[0012] In some of the embodiments, the heating element is a coil, and the processor controls to increase the current of the coil to heat the lock cylinder.
[0013] In some of the embodiments, the processor has a PWM output terminal, and is connected to the coil of the electromagnet via the PWM output terminal, so as to control the current input to the coil via a PWM signal.
[0014] In some embodiments, the heating element includes a heating wire coiled around an electromagnet, and the processor controls the heating wire to be energized to heat the lock cylinder.
[0015] In some of the embodiments, the outer surface of the shell of the electromagnet is provided with a groove for the heating wire to be embedded.
[0016] In some of the embodiments, a partition block is provided in the lock housing, the partition block divides the lock housing into a lock core area and a lock hook connection area, and the partition block is provided with a through hole for the lock tongue to pass through.
[0017] In some of the embodiments, a seal is provided between the outer periphery of the lock tongue and the lock housing, and the seal is located in the lock core area. The seal separates the lock core area into a sealed area sealed and isolated from the lock hook connection area and a non-sealed area connected to the lock hook connection area, and the electromagnet is located in the sealed area.
[0018] In some of the embodiments, 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 chip that generates an induction signal with the RFID chip, and the processor is electrically connected to the RFID sensor chip.
[0019] In addition, the utility model also provides an intelligent vending refrigerator, including a cabinet body and a cabinet door connected to the cabinet body, and a door lock with a defrost function as described in any of the above technical solutions is arranged 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.
[0020] Compared with the prior art, the advantages and beneficial effects of the utility model are:
[0021] 1. In the door lock with defrosting function provided by the present invention, the locking position of the lock tongue and the lock hook is located in the lock hook connection area in the lock shell. When the lock tongue and the lock hook are locked, the lock tongue does not need to extend out of the lock shell, thereby avoiding the lock tongue from being exposed to the external space. When it is installed inside a refrigerator, the contact between the lock tongue and the cold air in the cabinet is reduced, and the risk of frost on the lock tongue is reduced, so that it can be installed in the cabinet for use, and has high safety. At the same time, by cooperating with the processor and the temperature sensor, when the temperature is too low and the lock tongue may be frozen by frost, the heating element is controlled to heat the lock core to defrost the lock core position, thereby eliminating the situation of resistance to unlocking, thereby ensuring the normal operation of the door lock;
[0022] 2. The intelligent vending refrigerator provided by the utility model adopts a door lock with a defrosting function, and the door lock can be installed inside the cabinet, which has strong concealment and high safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0024] Figure 1 This is a structural schematic diagram of an embodiment of the door lock with defrosting function of the utility model in a locked state;
[0025] Figure 2 This is a structural schematic diagram of an embodiment of the door lock with defrosting function of the utility model in an unlocked state;
[0026] Figure 3 This is a control principle block diagram of a processor, a temperature sensor, an RFID sensor sheet, and an electromagnet in one embodiment of a door lock with a defrosting function of the utility model;
[0027] Figure 4 This is a schematic diagram of an interface of a processor in an embodiment of a door lock with a defrosting function of the utility model;
[0028] Figure 5 This is a circuit schematic diagram of a temperature sensor in one embodiment of a door lock with a defrosting function of the utility model;
[0029] Figure 6 This is a circuit schematic diagram of a control electromagnet in one embodiment of a door lock with a defrosting function of the utility model;
[0030] Figure 7 This is a structural schematic diagram of a lock body in another embodiment of a door lock with a defrosting function of the utility model;
[0031] Figure 8This is a schematic diagram of the assembly structure of the heating wire and the electromagnet in another embodiment of the door lock with defrosting function of the utility model;
[0032] Fig. 9 This is a schematic structural diagram of an embodiment of the intelligent vending refrigerator of the utility model.
[0033] In the figure:
[0034] 1. Door lock; 2. Cabinet body; 3. Cabinet door;
[0035] 11. Lock hook; 12. Lock body; 13. Control circuit board; 14. Temperature sensor; 15. RFID sensor; 16. Processor; 17. Door body connector; 18. RFID chip;
[0036] 121, lock housing; 122, lock core; 1221, lock tongue; 1222, electromagnet; 123, separator block; 124, seal; 125, heating wire;
[0037] a. Lock core area; b. Lock hook connection area. DETAILED DESCRIPTION
[0038] 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. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.
[0039] In the description of the present invention, it should be understood that the terms "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0041] As attached Figure 1-Figure 3As shown, in an illustrative embodiment of the door lock 1 with a defrosting function of the utility model, the door lock 1 with a defrosting function comprises a lock hook 11, a lock body 12, a temperature sensor 14, a heating element and a control circuit board 13; the lock body 12 comprises a lock shell 121 and a lock core 122; the inner space of the lock shell 121 is divided into a lock core area a and a lock hook connection area b, and the lock shell 121 is provided with a lock opening connected to the lock hook connection area b, so that the lock hook 11 can extend into the lock hook connection area b; the lock core 122 is installed in the lock core area a, and the lock core 122 comprises a lock tongue 1221 that performs a linear reciprocating motion between a locking position and an unlocking position; When the lock tongue 1221 moves to the locking position, one end of the lock tongue 1221 extends into the lock hook connection area b to lock with the lock hook 11; when the lock tongue 1221 moves to the unlocking position, the lock tongue 1221 retracts into the lock core area a to unlock; the temperature sensor 14 is installed in the lock core area a to monitor the temperature of the lock core 122; the heating element is arranged in the lock core area a to heat the lock core 122; the control circuit board 13 is equipped with a processor 16, and the processor 16 is electrically connected to the heating element and the temperature sensor 14 respectively, so as to control the heating element to heat the lock core 122 when the temperature monitored by the temperature sensor 14 is lower than the preset temperature. It should be noted that, according to experience, when the temperature is lower than -15°C, the frost phenomenon in the cabinet is obvious, which may cause the lock tongue 1221 to frost. Therefore, the preset temperature in this embodiment is set to -15°C.
[0042] In the above-mentioned door lock 1 with defrosting function, the locking position of the lock tongue 1221 and the lock hook 11 is located in the lock hook connection area b in the lock shell 121. When the lock tongue 1221 and the lock hook 11 are locked, the lock tongue 1221 does not need to extend out of the lock shell 121, thereby avoiding the lock tongue 1221 from being exposed to the external space. When it is installed inside the refrigerator, the contact between the lock tongue 1221 and the cold air in the cabinet is reduced, and the risk of frost on the lock tongue 1221 is reduced, so that it can be installed in the cabinet for use with high safety. At the same time, through the cooperation of the processor 16 and the temperature sensor 14, when the temperature is too low and the lock tongue 1221 may be frosted and frozen, the heating element is controlled to heat the lock core 122 to defrost the lock core 122 position, eliminate the situation of unlocking resistance, and ensure the normal operation of the door lock 1.
[0043] It should be noted that, in this embodiment, the processor 16 adopts an existing MCU chip, and its interface diagram is as follows: Figure 4 As shown, the NTC interface is an interface for connecting the temperature sensor 14. The temperature sensor 14 adopts an existing model temperature sensor, and the circuit schematic diagram of the MCU chip controlling the temperature sensor 14 is as follows: Figure 5 shown.
[0044] like Figure 1 and Figure 2As shown, in order to facilitate the control of the reciprocating motion of the lock tongue 1221, in this embodiment, the lock core 122 also includes an electromagnet 1222, and the lock tongue 1221 is arranged in the electromagnet 1222; the processor 16 is electrically connected to the coil of the electromagnet 1222 to control the on and off of the coil, so that the lock tongue 1221 performs a linear reciprocating motion under the control of the magnetic force generated by the on and off of the coil.
[0045] Furthermore, in this embodiment, the heating element is a coil, and the processor 16 controls to increase the current of the coil to heat the lock core 122. It should be noted that the working principle of the electromagnet 1222 is that the energized coil generates a magnetic attraction, and the magnetic force drives the iron lock tongue 1221 to move. The greater the current, the stronger the magnetic force generated. Therefore, if the temperature is too low, after the lock tongue 1221 is frozen, by increasing the coil current, the coil will generate eddy currents and thus generate 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 effect of defrosting and melting. Therefore, in this embodiment, the coil of the electromagnet 1222 is used to control the movement of the lock tongue 1221 through electromagnetic action, and is also used to heat the lock core 122 when the lock tongue 1221 is frozen, without the need to set up a separate heating element. It should also be noted that the coil of the electromagnet 1222 is set with a maximum operating temperature. If the monitored temperature exceeds the set maximum operating temperature, the defrost and melting action will be suspended. After the electromagnet 1222 returns to the normal operating temperature, the defrost and melting action will be restarted until the lock tongue 1221 is thawed and unfrozen.
[0046] like Figure 4 and Figure 6 As shown, the specific structure of the processor 16 controlling the increase of the coil current is as follows: the processor 16 has a PWM output terminal, and is connected to the coil of the electromagnet 1222 through the PWM output terminal, so as to control the current input to the coil through the PWM signal. It should be noted that PWM is a method of regulating power by integrating the effect of supplying power to the load through a driving tube at a certain frequency and duty cycle, which is a prior art. Figure 4 As shown in the figure, the LOCK_W interface of the MCU chip is the PWM output terminal. Figure 6 The control circuit principle of the present embodiment using PWM signal to control the electromagnet 1222 is shown.
[0047] like Figure 1 As shown, in this embodiment, a partition block 123 is provided in the lock housing 121, and the partition block 123 divides the lock housing 121 into a lock core area a and a lock hook connection area b, and the partition block 123 is provided with a through hole for the lock tongue 1221 to pass through. In this embodiment, the partition block 123 is provided to facilitate the separation of the lock core area a and the lock hook connection area b, and at the same time, the through hole provided by the partition block 123 can limit the movement direction of the lock tongue 1221.
[0048] like Figure 2As shown, in order to prevent water vapor in the cabinet from entering the lock core 122 and affecting the operation of the electromagnet 1222 in the lock core 122, in this embodiment, a seal 124 is provided between the outer periphery of the lock tongue 1221 and the lock housing 121. The seal 124 is located in the lock core area a. The seal 124 separates the lock core area a into a sealed area sealed and isolated from the lock hook connection area b and a non-sealed area connected to the lock hook connection area b. The electromagnet 1222 is located in the sealed area. Specifically, one end of the seal 124 is sleeved on the outer periphery of the lock tongue 1221, and the other end is sleeved on the side of the partition block 123 facing the lock core area a. The seal 124 is made of a flexible material and expands and contracts with the reciprocating motion of the lock tongue 1221.
[0049] like Figure 1-Figure 3 As shown, in order to avoid the problem of cheating, in this embodiment, the door lock 1 also includes a door body connector 17, the lock hook 11 is installed on the door body connector 17, and the door body connector 17 is also installed with an RFID chip 18; the control circuit board 13 is configured with an RFID sensor sheet 15 that generates an induction signal with the RFID chip 18, and the processor 16 is electrically connected to the RFID sensor sheet 15 to control the on and off of the coil according to the induction signal of the RFID sensor sheet 15 to the RFID chip 18. When the RFID sensor sheet 15 generates an induction signal with the RFID chip 18, the RFID sensor sheet 15 outputs a lock-closing instruction to the processor 16, thereby preventing cheating. It should be noted that the use of the RFID chip 18 to control the lock-closing instruction is an existing technology used in smart vending refrigerators, such as patent CN111305655A, and the specific working process will not be repeated here. It should be noted that, as Figure 4 As shown, the RPI interface of the MCU chip is an interface for connecting the RFID sensor sheet 15 .
[0050] like Figure 7 and Figure 8 As shown, in another exemplary embodiment of the door lock 1 with defrosting function of the utility model, the heating element includes a heating wire 125 coiled around the electromagnet 1222, and the processor 16 controls the heating wire 125 to be powered on to heat the lock core 122. In this embodiment, the heating wire 125 is provided as a heating element, so as to heat the lock core 122 and avoid the maximum operating temperature limit when the electromagnet 1222 coil is used as the heating element.
[0051] like Figure 8 As shown, in order to facilitate the installation of the heating wire 125, in this embodiment, the outer surface of the shell of the electromagnet 1222 is provided with a groove for the heating wire 125 to be embedded.
[0052] Based on the above-mentioned door lock 1 with defrosting function, the utility model further provides an intelligent vending refrigerator, comprising a cabinet body 2 and a cabinet door 3 connected to the cabinet body 2, wherein the above-mentioned door lock 1 with defrosting function is arranged between the cabinet body 2 and the cabinet door 3, wherein the lock body 12 is installed on the cabinet body 2 and located on the inner wall of the cabinet body 2 facing the storage space, and the lock hook 11 is correspondingly installed on the cabinet door 3. The intelligent vending refrigerator adopts the door lock 1 with defrosting function, and the door lock 1 can be installed in the cabinet, with strong concealment and high safety.
[0053] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0054] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for which protection is requested in the utility model.
Claims
1. Door lock with defrosting function, characterized in that: include: Lock hook; The lock body comprises a lock shell and a lock core; the inner space of the lock shell is divided into a lock core area and a lock hook connection area; the lock shell is provided with a lock opening which is in communication with the lock hook connection area so as to allow the lock hook to extend into the lock hook connection area; the lock core is installed in the lock core area, and the lock core comprises a lock tongue which performs linear reciprocating motion between a locking position and an unlocking position; when the lock tongue moves to the locking position, one end of the lock tongue extends into the lock hook connection area to lock with the lock hook; when the lock tongue moves to the unlocking position, the lock tongue retracts into the lock core area to unlock; A temperature sensor is installed in the lock core area and is used to monitor the temperature of the lock core; A heating element, the heating element is arranged in the lock core area and is used to heat the lock core; A control circuit board is provided with a processor, and the processor is electrically connected to the heating element and the temperature sensor respectively, so as to control the heating element to heat the lock cylinder when the temperature monitored by the temperature sensor is lower than a preset temperature.
2. The door lock with defrosting function according to claim 1, characterized in that: The lock core also includes an electromagnet, and the lock tongue is arranged in the electromagnet; the processor is electrically connected to the coil of the electromagnet to control the on and off of the coil, so that the lock tongue performs linear reciprocating motion under the control of the magnetic force generated by the on and off of the coil.
3. The door lock with defrosting function according to claim 2, characterized in that: The heating element is the coil, and the processor controls to increase the current of the coil to heat the lock cylinder.
4. The door lock with defrosting function according to claim 3, characterized in that: The processor has a PWM output terminal, and is connected to the coil of the electromagnet via the PWM output terminal, so as to control the current input to the coil via a PWM signal.
5. The door lock with defrosting function according to claim 2, characterized in that: The heating element includes a heating wire coiled around the electromagnet, and the processor controls the heating wire to be energized to heat the lock core.
6. The door lock with defrosting function according to claim 5, characterized in that: The outer surface of the shell of the electromagnet is provided with a groove for the heating wire to be embedded.
7. The door lock with defrosting function according to claim 2, characterized in that: A partition block is arranged in the lock housing, and the partition block divides the lock housing into the lock core area and the lock hook connection area. The partition block is provided with a through hole for the lock tongue to pass through.
8. The door lock with defrosting function according to claim 7, characterized in that: A seal is provided between the outer periphery of the lock tongue and the lock housing, and the seal is located in the lock core area. The seal separates the lock core area into a sealed area sealed and isolated from the lock hook connection area and a non-sealed area connected to the lock hook connection area, and the electromagnet is located in the sealed area.
9. The door lock with defrosting function according to claim 1, 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 installed with an RFID chip; the control circuit board is configured with an RFID sensor chip that generates an induction signal with the RFID chip, and the processor is electrically connected to the RFID sensor chip.
10. An intelligent vending refrigerator, comprising a cabinet body and a cabinet door connected to the cabinet body, characterized in that: A door lock with a defrost function as claimed in any one of claims 1 to 9 is arranged 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.