Refrigeration equipment and control method thereof

Abstract

The invention provides refrigeration equipment and a control method thereof. The refrigeration equipment comprises a fresh-keeping bin, a magnetic field induction device and a first magnetic device arranged in the induction range of the magnetic field induction device. Wherein the magnetic field induction device is arranged on the front wall of the fresh-keeping bin and is used for detecting a distance signal between the magnetic field induction device and the first magnetic device; the magnetic attraction assembly is arranged on the rear wall of the fresh-keeping bin; the switch device is used for sending an instruction for opening and closing the fresh-keeping bin; the controller is used for controlling attraction or repulsion of the magnetic attraction assembly according to the fresh-keeping bin opening and closing instruction sent by the switch device and the distance signal detected by the magnetic field induction device so as to open and close the fresh-keeping bin, and the problems that due to the fact that the fresh-keeping bin is manually opened and closed, the fresh-keeping bin is not tightly sealed, bacteria breed, and the fresh-keeping efficiency is high are solved. According to the fresh-keeping device, the fresh-keeping bin can be automatically controlled to be closed and opened, it is guaranteed that the fresh-keeping bin can be tightly closed, the opportunity of bacterium breeding is reduced, and therefore the fresh-keeping effect is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of automatic opening and closing of a fresh-keeping bin, and in particular to a refrigeration device and a control method thereof. Background Art

[0002] With the continuous development of society, people have higher and higher requirements for living standards and a faster pace of life. Therefore, they are more and more willing to put food in refrigerated equipment for refrigerated storage, such as refrigerators. However, the use of refrigerators also brings some problems, especially in terms of food storage and hygiene. Since refrigerators store a large amount of food for a long time, users may forget to take out short-term perishable food in time, causing some food to spoil and deteriorate. While wasting food, it will also breed bacteria, which is not conducive to food storage. In addition, if the fresh-keeping bin is not tightly closed, bacteria may also enter. At the same time, manually opening and closing the fresh-keeping bin of the refrigeration equipment may also cause the fresh-keeping bin to be loosely closed, which may be the cause of bacterial growth. Therefore, how to maintain the hygiene inside the refrigerator and prevent food from spoiling has become one of the focuses of users.

[0003] Some existing sterilization methods detect ozone concentration to decide whether to start ultraviolet light sterilization. Although this can inhibit the growth of bacteria to a certain extent, this sterilization method is not intelligent enough and affects the user experience. First, this sterilization method requires manual operation. Users need to regularly check the sanitary conditions inside the refrigerator and manually start the sterilization function, which undoubtedly increases the burden on users. Secondly, this sterilization method cannot monitor the sanitary conditions inside the refrigerator in real time, and cannot sterilize at the early stage of bacterial growth, resulting in poor sterilization effect.

[0004] Traditional fresh-keeping bins have some limitations in design and use, which may affect the food preservation effect and user experience. First, the manual opening and closing of the fresh-keeping bin is simple and intuitive, but in actual use, due to user negligence or improper operation, the fresh-keeping bin may not be tightly closed, which may easily breed bacteria, thus affecting the preservation effect. For example, if the door is not completely closed, moisture and bacteria in the air may enter the fresh-keeping bin, destroying the freshness and safety of the food.

[0005] Therefore, the prior art needs to be further developed. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and provide a refrigeration device and a control method thereof to solve the technical problem that the manual opening and closing of the fresh-keeping bin in the refrigeration device in the related technology may cause the fresh-keeping bin to be not tightly sealed, which is easy to breed bacteria and thus affect the preservation effect.

[0007] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: According to a first aspect of the present invention, the present invention provides a refrigeration device, including a fresh-keeping bin, the fresh-keeping bin including a fresh-keeping bin front wall and a fresh-keeping bin rear wall, and the refrigeration device also includes: A magnetic field sensing device, and a first magnetic device arranged within the sensing range of the magnetic field sensing device; wherein the magnetic field sensing device is arranged on the front wall of the fresh-keeping bin, and is used to detect a distance signal between itself and the first magnetic device; A magnetic suction component is arranged on the rear wall of the fresh-keeping bin; The switch device is arranged on the front wall of the fresh-keeping bin and is used to issue instructions for opening and closing the fresh-keeping bin; The controller is used to control the attraction or repulsion of the magnetic attraction component to open and close the fresh-keeping bin according to the opening and closing instructions of the fresh-keeping bin issued by the switch device and the distance signal detected by the magnetic field sensing device, so as to open and close the fresh-keeping bin.

[0008] Specifically, the magnetic attraction component includes: The second magnetic device is arranged on the inner side of the rear wall of the fresh-keeping bin; The electromagnetic winding is arranged on the outer side of the rear wall of the fresh-keeping bin. The electromagnetic winding is connected to the controller for control. A shielding ring is arranged on the periphery of the electromagnetic winding for isolating the electromagnetic winding from other components in the fresh-keeping bin.

[0009] Specifically, the fresh-keeping bin includes a slide rail, and the refrigeration equipment further includes: The limiting device is arranged on the slide rail and is used for detecting the distance between the electromagnetic winding and the second magnetic device.

[0010] Specifically, the refrigeration equipment further includes: The sterilizing device is arranged inside the fresh-keeping bin and is control-connected to the controller for sterilizing the internal area of ​​the fresh-keeping bin.

[0011] Specifically, the magnetic field sensing device includes a Hall effect sensor; The first magnetic device comprises a small square permanent magnet, and the second magnetic device comprises a long permanent magnet strip; The sterilization device comprises a sterilization lamp.

[0012] Specifically, the refrigeration equipment includes: Refrigerators, fresh-keeping cabinets, refrigerated display cabinets, and air curtain display cabinets.

[0013] According to a second aspect of the present invention, there is provided a control method, comprising: S100, receiving an instruction for opening or closing the fresh-keeping bin issued by a user through a switch device; S200, obtaining a distance signal between the magnetic field sensing device and the first magnetic device detected by the magnetic field sensing device; S300: According to the instruction and the distance signal, control the attraction or repulsion of the magnetic attraction component to open and close the fresh-keeping bin.

[0014] Specifically, the S300 includes: If the received instruction is a fresh-keeping bin closing instruction, it is determined whether the distance signal between the magnetic field sensing device and the first magnetic device is greater than a first preset distance. If so, the magnetic attraction component is controlled to be attracted, so that the fresh-keeping bin starts to close; If not, the magnetic attraction component is not controlled to be attracted.

[0015] Specifically, the controlling the magnetic attraction component to be attracted, thereby causing the fresh-keeping bin to start closing, includes: The controller controls the first current input to the electromagnetic winding, so that the electromagnetic winding generates a magnetic field with a polarity opposite to that of the second magnetic device, thereby causing the magnetic attraction component to be attracted and the fresh-keeping bin to start closing.

[0016] Specifically, the magnetic attraction component is attracted to close the fresh-keeping bin, including: Setting the closing speed of the fresh-keeping bin, determining the magnetic force between the electromagnetic winding and the second magnetic device during the closing process of the fresh-keeping bin through the closing speed of the fresh-keeping bin, and then determining the magnitude of the first current input into the electromagnetic winding; During the closing process of the fresh-keeping bin, the magnitude of the first current input to the electromagnetic winding is gradually reduced, so that the magnetic force between the electromagnetic winding and the second magnetic device remains unchanged during the closing process of the fresh-keeping bin.

[0017] Specifically, the magnetic attraction component is attracted to close the fresh-keeping bin, and the method further includes: Determine whether the distance signal between the current magnetic field sensing device and the first magnetic device is less than or equal to the first preset distance. If so, the fresh-keeping bin door closing is completed and the input of the first current to the electromagnetic winding is stopped; If not, continue to input the first current into the electromagnetic winding until the distance signal between the magnetic field induction device and the first magnetic device is less than or equal to the first preset distance.

[0018] Specifically, the S300 further includes: If the received instruction is a fresh-keeping bin opening instruction, it is determined whether the distance signal between the magnetic field sensing device and the first magnetic device is less than or equal to the first preset distance. If so, the magnetic attraction component is controlled to repel, thereby causing the fresh-keeping bin to start opening; If not, the magnetic attraction component is not controlled to repel.

[0019] Specifically, controlling the magnetic attraction component to repel, thereby causing the fresh-keeping bin to begin to open, includes: The controller controls the second current input to the electromagnetic winding, so that the electromagnetic winding generates a magnetic field with the same polarity as the second magnetic device, thereby causing the magnetic attraction component to repel and the fresh-keeping bin to begin to open.

[0020] Specifically, the magnetic attraction component performs repulsion to cause the fresh-keeping bin to begin to open, including: Setting the speed of opening the fresh-keeping bin, determining the magnetic force between the electromagnetic winding and the second magnetic device during the process of opening the fresh-keeping bin door according to the speed of opening the fresh-keeping bin, and then determining the magnitude of the second current input into the electromagnetic winding; During the process of opening the fresh-keeping bin, the magnitude of the second current input into the electromagnetic winding is gradually increased, so that the magnetic force between the electromagnetic winding and the second magnetic device remains unchanged during the process of opening the fresh-keeping bin.

[0021] Specifically, the magnetic attraction component performs repulsion to cause the fresh-keeping bin to begin to open, and further includes: Determine whether the current distance between the electromagnetic winding and the second magnetic device reaches the second preset distance. If so, the fresh-keeping bin door is opened and the second current input to the electromagnetic winding is stopped. If not, continue to input the second current into the electromagnetic winding until the distance between the electromagnetic winding and the second magnetic device reaches a second preset distance.

[0022] Specifically, the control method further includes: Determine whether the distance signal between the magnetic field sensing device and the first magnetic device is less than or equal to a first preset distance, and if so, control the sterilization device to start a preset sterilization mode; If not, determine whether the current sterilization device is turned on, and if so, control the sterilization device to be turned off; If not, no action is performed.

[0023] Specifically, the sterilization device includes a sterilization lamp, and the preset sterilization mode includes: The sterilization lamp in the fresh-keeping bin is controlled to remain on at a power state of 6W for 30 minutes, and then the sterilization lamp is controlled to remain on at a power state of 3W for 90 minutes.

[0024] Beneficial effects: The present invention receives instructions for opening and closing the fresh-keeping bin issued by the user through a switch device; obtains a distance signal between the magnetic field sensing device and the first magnetic device; and controls the fresh-keeping bin to automatically open or close according to the instructions and the distance signal, thereby solving the technical problem in the prior art that manually opening and closing the fresh-keeping bin may cause the fresh-keeping bin to be loosely sealed, easily breed bacteria, and thus affect the fresh-keeping effect. The present invention can automatically control the closing and opening of the fresh-keeping bin, ensure that the fresh-keeping bin can be tightly closed, reduce the chance of bacterial growth, and further improve the fresh-keeping effect. The opening and closing of the fresh-keeping bin is automatically controlled according to the distance between the magnetic field sensing device and the first magnetic device, and combined with the sterilization device, a sterilization effect is achieved. When sterilization is not needed, unnecessary sterilization operations are not performed, thereby avoiding waste of electric energy and greatly improving energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the structural composition of a refrigeration device provided in a specific embodiment of the present invention; Figure 2 is a flow chart of a control method provided in a specific embodiment of the present invention; Figure 3 It is a flow chart of the magnetic automatic switch control of the fresh-keeping bin provided in a specific embodiment of the present invention; Figure 4 It is a flow chart of the control of the sterilization part of the fresh-keeping warehouse provided in a specific embodiment of the present invention; Figure 5 It is a schematic diagram of the opening process of the magnetic automatic switch and the sterilization and fresh-keeping bin provided in a specific embodiment of the present invention; Figure 6 It is a schematic diagram of the magnetic automatic switch and the sterilization and fresh-keeping bin closing process provided in a specific embodiment of the present invention.

[0026] Wherein, the reference numerals of the above-mentioned drawings are as follows: 1. Fresh-keeping bin front wall; 2. Fresh-keeping bin rear wall; 3. Fresh-keeping bin door; 4. Slide rail; 5. Magnetic field sensing device; 6. First magnetic device; 7. Switch device; 8. Second magnetic device; 9. Electromagnetic winding; 10. Shielding ring; 11. Sterilization device; 12. Limiting device; 13. First electromagnetic winding; 14. Second electromagnetic winding; 15. First sterilization lamp; 16. Second sterilization lamp; 17. Hall effect sensor; 18. Permanent magnet strip; 19. Square permanent small magnet. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0028] The present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments.

[0029] Embodiment 1 According to an embodiment of the present invention, a refrigeration device is provided. Figure 1 , including a fresh-keeping bin, the fresh-keeping bin including a fresh-keeping bin front wall 1 and a fresh-keeping bin rear wall 2, the refrigeration equipment also includes: A magnetic field sensing device 5, and a first magnetic device 6 arranged within the sensing range of the magnetic field sensing device 5; wherein the magnetic field sensing device 5 is arranged on the front wall 1 of the fresh-keeping bin, and is used to detect a distance signal between itself and the first magnetic device 6; A magnetic suction component is arranged on the rear wall 2 of the fresh-keeping bin; The switch device 7 is arranged on the front wall 1 of the fresh-keeping bin and is used to issue an instruction to open or close the fresh-keeping bin; The controller is used to control the attraction or repulsion of the magnetic attraction component to open and close the fresh-keeping bin according to the opening and closing instructions of the fresh-keeping bin issued by the switch device and the distance signal detected by the magnetic field sensing device 5, so as to open and close the fresh-keeping bin.

[0030] See also Figure 1 In some specific embodiments, the first magnetic device 6 is arranged on the fresh-keeping compartment door 3, and the switch device 7 can use a toggle switch. If the refrigeration is in the off state at this time, when the user toggles the switch arranged on the front wall 1 of the refrigerator fresh-keeping compartment, a fresh-keeping compartment opening instruction is sent to the controller, and the controller will control the fresh-keeping compartment to open after receiving the instruction. If the fresh-keeping compartment is opened, at this time, when the user toggles the switch arranged on the front wall 1 of the refrigerator fresh-keeping compartment again, a fresh-keeping compartment closing instruction is sent to the controller, and the controller will control the fresh-keeping compartment to close after receiving the instruction.

[0031] Specifically, the refrigeration equipment of this embodiment solves the technical problem in the prior art that the fresh-keeping bin may not be tightly closed and easily breed bacteria, thereby affecting the preservation effect by manually opening and closing the fresh-keeping bin. The refrigeration equipment of this embodiment can automatically control the closing and opening of the fresh-keeping bin, ensuring that the fresh-keeping bin can be tightly closed, reducing the chance of bacterial growth, and further improving the preservation effect.

[0032] Specifically, the magnetic attraction component includes: The second magnetic device 8 is arranged on the inner side of the fresh-keeping bin rear wall 2; The electromagnetic winding 9 is arranged on the outside of the rear wall 2 of the fresh-keeping bin. The electromagnetic winding 9 is connected to the controller. A shielding ring 10 is arranged on the periphery of the electromagnetic winding 9 to isolate the electromagnetic winding 9 from other components in the fresh-keeping bin.

[0033] See also Figure 1 In some specific embodiments, the second magnetic device 8 is arranged on the inner side of the rear wall 2 of the refrigerator fresh-keeping compartment, and the electromagnetic winding 9 is arranged on the outer side of the rear wall 2 of the refrigerator fresh-keeping compartment, and does not contact the rear wall of the fresh-keeping compartment. The electromagnetic winding 9 is fixedly arranged on the rear wall of the refrigerator shell. The electromagnetic winding 9 can be set as two electromagnetic windings, which are respectively connected to the controller. The electromagnetic winding 9 and the second magnetic device 8 can generate a mutually attractive suction force or a mutually repulsive repulsive force, thereby closing or opening the fresh-keeping compartment, further improving the degree of automation of the present invention. The outer ring of the electromagnetic winding 9 is provided with a shielding ring 10, which only exposes the side facing the fresh-keeping compartment, which can isolate the electromagnetic winding 9 and greatly reduce the influence of the magnet generated by the electromagnetic winding 9 on other parts of the refrigerator.

[0034] Specifically, the fresh-keeping bin includes a slide rail 4, and the refrigeration equipment further includes: The limiting device 12 is arranged on the slide rail 4 and is used to detect the distance between the electromagnetic winding 9 and the second magnetic device 8 .

[0035] It is understandable that the limit device 12 detects the distance between the electromagnetic winding 9 and the second magnetic device 8. When the distance moved after the fresh-keeping bin is opened reaches a fixed distance, the limit device 12 will open, and when the fresh-keeping bin is closed, the limit device 12 will close (it can be reopened when the fresh-keeping bin is opened). In this way, the degree of opening of the fresh-keeping bin can be judged to prevent the fresh-keeping bin from being opened too much, so that the area of ​​the fresh-keeping bin exposed to the air is too large and bacteria grow too much.

[0036] Specifically, the refrigeration equipment further includes: The sterilizing device 11 is arranged inside the fresh-keeping bin and is control-connected to the controller for sterilizing the inner area of ​​the fresh-keeping bin.

[0037] See also Figure 1 In some specific embodiments, the sterilization device 11 can be set on the upper wall inside the fresh-keeping bin to sterilize the internal area of ​​the fresh-keeping bin. When the fresh-keeping bin is closed, the sterilization device 11 can be controlled to turn on the sterilization function. When the fresh-keeping bin is opened, the sterilization device 11 is controlled to turn off the sterilization function, thereby further improving the sterilization effect while ensuring the sealing of the fresh-keeping bin.

[0038] Specifically, the magnetic field sensing device 5 includes a Hall effect sensor 17; The first magnetic device 6 includes a small square permanent magnet 19, and the second magnetic device 8 includes a long permanent magnet strip 18; The sterilization device 11 includes a sterilization lamp.

[0039] Preferably, a Hall effect sensor 17 can be used as the magnetic field sensing device 5, and a square permanent small magnet 19 can be used as the first magnetic device 6. This combination can accurately sense the change of the magnetic field. The Hall effect sensor has the characteristics of high precision and fast response. In combination with the square permanent small magnet 19, the vertical distance between the two can be accurately obtained, thereby providing a reliable basis for the automatic control of the fresh-keeping bin. The permanent magnet strip 18 as the second magnetic device 8 may also accurately sense the magnetic field changes between the electromagnetic winding 9 and the magnetic field of the entire system, which helps to improve the functions of magnetic field sensing and fresh-keeping bin control. The sterilization lamp in the sterilization device 11 can sterilize the inside of the fresh-keeping bin. In this embodiment, the number of sterilization lamps is preferably 2, namely the first sterilization lamp 15 and the second sterilization lamp 16. The use of the sterilization lamp can effectively kill bacteria, molds and other microorganisms in the fresh-keeping bin, thereby ensuring the cleanliness of the environment in the fresh-keeping bin, reducing the contamination of fresh-keeping items by microorganisms, and extending the shelf life of fresh-keeping items in the refrigerator.

[0040] Specifically, the refrigeration equipment includes: a refrigerator, a fresh-keeping cabinet, a refrigerated display cabinet, and an air curtain display cabinet.

[0041] Furthermore, the refrigeration equipment in the present invention includes refrigerators, fresh-keeping cabinets, refrigerated display cabinets, air curtain display cabinet lights, etc., which greatly expands the application scenarios of the present invention.

[0042] It should be noted here that the present embodiment provides a refrigeration device, which controls the fresh-keeping bin to be automatically opened or closed by setting a magnetic field sensing device, a first magnetic device, a switching device and a controller according to the instruction of opening or closing the fresh-keeping bin issued by the switching device, thereby solving the technical problem in the prior art that the fresh-keeping bin may not be tightly closed and easily breed bacteria, thereby affecting the preservation effect. The present invention can automatically control the closing and opening of the fresh-keeping bin, ensure that the fresh-keeping bin can be tightly closed, reduce the chance of bacterial growth, thereby further improving the preservation effect, and at the same time, a sterilization device is provided to achieve a sterilization effect.

[0043] Embodiment 2 This embodiment provides a control method, including receiving an instruction for opening and closing a fresh-keeping bin issued by a user through a switch device 7; obtaining a distance signal between a magnetic field sensing device 5 and a first magnetic device 6; and controlling the attraction or repulsion of a magnetic attraction component according to the instruction and the distance signal to open and close the fresh-keeping bin.

[0044] It can be understood that the control method of this embodiment solves the technical problem in the prior art that the fresh-keeping bin is not tightly closed and easily breeds bacteria due to manual opening and closing of the fresh-keeping bin, thus affecting the preservation effect. The present invention can automatically control the closing and opening of the fresh-keeping bin, ensuring that the fresh-keeping bin can be tightly closed, reducing the chance of bacterial growth, thereby further improving the preservation effect and greatly improving the intelligence, usability and reliability of the present invention.

[0045] See also Figure 2-Figure 6 In the control method of this embodiment, the control method includes: S100, receiving a fresh-keeping bin opening and closing instruction issued by a user through a switch device 7; S200, obtaining a distance signal between the magnetic field sensing device 5 and the first magnetic device 6 detected by the magnetic field sensing device 5; S300: According to the instruction and the distance signal, control the attraction or repulsion of the magnetic attraction component to open and close the fresh-keeping bin.

[0046] Specifically, the S300 includes: If the received instruction is a fresh-keeping bin closing instruction, it is determined whether the distance signal between the magnetic field sensing device 5 and the first magnetic device 6 is greater than the first preset distance. If so, the magnetic attraction component is controlled to be attracted, so that the fresh-keeping bin starts to close; If not, the magnetic attraction component is not controlled to be attracted.

[0047] Preferably, in this embodiment, the first preset distance is set to 10 mm, and the magnetic field sensing device 5 is preferably a Hall effect sensor 17. In this embodiment, a Hall effect sensor of model TMAG5231 from TI manufacturer is selected. According to actual test data, when the sensing distance between this model of Hall effect sensor 17 and the square permanent small magnet 19, that is, the first magnetic device, is 10 mm, the fresh-keeping bin is in a closed state, and when the spacing between the Hall effect sensor 17 and the square permanent small magnet exceeds 10 mm, the Hall effect sensor 17 outputs a high level; when it is less than or equal to 10 mm, the Hall effect sensor 17 outputs a low level. The spacing of 10 mm is not fixed in the present invention. If it is a Hall effect sensor from different manufacturers and different models, and a permanent square magnet of different models, the sensing distance will also be different.

[0048] Furthermore, the suction force between the electromagnetic winding 9 and the permanent magnet strip 18 is used to close the fresh-keeping compartment door. Compared with some traditional mechanical closing methods, it can provide a more stable and reliable closing force, which helps to ensure that the fresh-keeping compartment can be tightly closed, and reduce problems such as reduced fresh-keeping effect and bacterial growth caused by loose closing. At the same time, after receiving the closing instruction, the controller can make judgments and automatically operate according to user needs, further saving energy consumption, which greatly improves the intelligence and reliability of the present invention.

[0049] Specifically, the controlling the magnetic attraction component to be attracted, thereby causing the fresh-keeping bin to start closing, includes: The controller controls the first current input to the electromagnetic winding 9, so that the electromagnetic winding 9 generates a magnetic field with a polarity opposite to that of the second magnetic device 8, thereby causing the magnetic attraction component to be attracted and the fresh-keeping bin to start closing.

[0050] See also Figure 3 and Figure 6 In the process of closing the fresh-keeping bin, when the instruction input by the user is a fresh-keeping bin closing instruction, and when the vertical distance between the current Hall effect sensor 17 and the square permanent small magnet 19 is greater than 10 mm, the electromagnetic winding 9 is passed as follows Figure 6 The forward current shown, i.e., the first current, according to the right-hand screw rule, the electromagnetic winding 9 will generate a magnetic field with opposite polarity to the permanent magnet strip 18, i.e., the second magnetic device. The electromagnetic winding 9 and the permanent magnet strip 18 attract each other, generating a suction force to close the fresh-keeping compartment door. If, under the closing command, the vertical distance between the Hall effect sensor 17 and the square permanent small magnet 19 is detected to be less than or equal to 10 mm, it means that it is already in the closed state, the command is invalid, and no operation is performed. This mechanism avoids repeated operations and reduces unnecessary current switching of the electromagnetic winding 9, thereby saving energy to a certain extent, while also reducing unnecessary wear of components and improving the reliability of the fresh-keeping compartment closure.

[0051] Specifically, the magnetic attraction component is attracted to close the fresh-keeping bin, including: The speed of closing the fresh-keeping bin is set, and the magnetic force between the electromagnetic winding 9 and the second magnetic device 8 during the closing process of the fresh-keeping bin is determined by the closing speed of the fresh-keeping bin, thereby determining the magnitude of the first current input into the electromagnetic winding 9; The above process of calculating the first current magnitude is as follows: The preferred value of the speed of closing the fresh-keeping bin is set in the controller program as V=5cm / s. The calculation process is as follows: (1) Based on the calculation formula of magnetic force (or Ampere force) F and the distance r between the electromagnetic winding and the permanent magnet strip: , ① r=V*t, Among them, K is a constant confirmed by the properties of the permanent magnet strip, m1 and m2 are the masses of the electromagnetic winding and the permanent magnet strip respectively, and t is the movement time of the fresh-keeping bin, from which the magnetic force F can be obtained; (2) The formula between magnetic induction intensity B and magnetic force (or Ampere force) F is: B=F / (I*r), Where I is the current of the electromagnetic winding, and r is the distance between the electromagnetic winding and the permanent magnet strip. The magnetic induction intensity can be obtained as follows: , ② Where L is the average length of the coil.

[0052] (3) The formula that expresses the relationship between the magnetic induction intensity B and the current I of the electromagnetic winding is as follows: B=μ0*(N*I) / L, ③ Among them, μ0 is the vacuum magnetic permeability, N is the number of turns of the electromagnetic winding, and L is the average length of the coil. Combining formulas ② and ③, we get: =μ0*(N*I) / L; The relationship between the current I of the electromagnetic winding and the movement time t is obtained: .

[0053] During the closing process of the fresh-keeping bin, the magnitude of the first current input to the electromagnetic winding 9 is gradually reduced, so that the magnetic force between the electromagnetic winding 9 and the second magnetic device 8 remains unchanged during the closing process of the fresh-keeping bin.

[0054] It should be further explained that, during the closing process of the fresh-keeping bin, the distance between the electromagnetic winding 9 and the second magnetic device 8 decreases, which increases the magnetic attraction between the two. At this time, the first current of the electromagnetic winding 9 is reduced, so that the magnetic field of the electromagnetic winding 9 decreases, and the magnetic attraction between the electromagnetic winding 9 and the second magnetic device 8 increases, thereby ensuring that the magnetic force between the electromagnetic winding 9 and the second magnetic device 8 remains unchanged.

[0055] Furthermore, by setting the closing speed of the fresh-keeping bin, the magnetic force between the electromagnetic winding 9 and the second magnetic device 8 is determined, and then the first current of the input electromagnetic winding 9 is determined. This allows the closing speed of the fresh-keeping bin to be accurately controlled according to demand, avoiding collision damage caused by too fast closing speed, or too slow closing speed affecting the use efficiency, and gradually reducing the first current of the input electromagnetic winding 9 during the closing process of the fresh-keeping bin to keep the magnetic force between the electromagnetic winding 9 and the second magnetic device 8 unchanged, ensuring that the fresh-keeping bin is evenly stressed during the closing process, avoiding vibration or instability caused by sudden changes in magnetic force, and making the closing process smoother. At the same time, stable current control and uniform magnetic force also reduce the risk of damage to components such as the electromagnetic winding 9 and the second magnetic device 8 due to uneven stress or current overload, extending the service life of the components.

[0056] Specifically, the magnetic suction component is attracted to close the fresh-keeping bin, and the method further includes: Determine whether the distance signal between the current magnetic field sensing device 5 and the first magnetic device 6 is less than or equal to the first preset distance. If so, the fresh-keeping compartment door is closed and the first current input to the electromagnetic winding 9 is stopped; If not, the first current continues to be input into the electromagnetic winding 9 until the distance signal between the magnetic field induction device 5 and the first magnetic device 6 is less than or equal to the first preset distance.

[0057] Furthermore, the door closing is determined to be complete only when the vertical distance between the magnetic field sensing device 5 and the first magnetic device 6 is less than or equal to the first preset distance. This precise judgment ensures that the fresh-keeping bin can be completely closed, avoiding problems such as reduced fresh-keeping effect and bacterial growth due to incomplete door closing. This realizes the reasonable control of current, avoids unnecessary current consumption, improves energy utilization efficiency, and thus improves the overall reliability of the system.

[0058] Specifically, the S300 further includes: If the received instruction is a fresh-keeping bin opening instruction, it is determined whether the distance signal between the magnetic field sensing device 5 and the first magnetic device 6 is less than or equal to the first preset distance. If so, the magnetic attraction component is controlled to repel, thereby causing the fresh-keeping bin to start opening; If not, the magnetic attraction component is not controlled to repel.

[0059] Furthermore, by judging the distance signal between the magnetic field sensing device 5 and the first magnetic device 6, it is possible to accurately determine whether the conditions for opening the fresh-keeping bin are met. This precise judgment mechanism can prevent misoperation, such as the sudden repulsion of the magnetic suction component under unexpected circumstances, which causes the fresh-keeping bin to open accidentally, thereby ensuring the safety of the items in the fresh-keeping bin and the normal operation of the entire device, while avoiding unnecessary magnetic suction component movements, reducing energy consumption, and improving the overall energy efficiency of the device. It can ensure that the device opens the fresh-keeping bin under appropriate conditions, extending the service life of the device.

[0060] Specifically, controlling the magnetic attraction component to repel, thereby causing the fresh-keeping bin to begin to open, includes: The controller controls the second current input to the electromagnetic winding 9, so that the electromagnetic winding 9 generates a magnetic field with the same polarity as the second magnetic device 8, thereby causing the magnetic attraction component to repel and the fresh-keeping bin to begin to open.

[0061] See also Figure 3 and Figure 5 In the process of opening the fresh-keeping bin, when the command input by the user is received as the fresh-keeping bin opening command, when it is determined that the vertical distance between the Hall effect sensor 17 and the square permanent small magnet 19 is less than or equal to 10 mm, the electromagnetic winding 9 is supplied with the following Figure 5 The reverse current shown, i.e., the second current, according to the right-hand screw rule, the electromagnetic winding 9 will generate a magnetic field with the same polarity as the permanent magnet strip 18, i.e., the second magnetic device 8. The electromagnetic winding 9 and the permanent magnet strip 18 repel each other, generating a thrust to open the fresh-keeping compartment door. If, under the opening command, the vertical distance between the Hall effect sensor 17 and the small square permanent magnet 19 is detected to be greater than 10 mm, it means that the fresh-keeping compartment is already in the open state at this time, and the command is invalid, and no operation is performed, which reduces the energy consumption of the electromagnetic winding 9 and achieves energy-saving effects. The electromagnetic principle is effectively used to realize the opening function. The reverse current is passed through the electromagnetic winding 9 to generate a magnetic field with the same polarity as the permanent magnet strip 18, and the fresh-keeping compartment door is opened by the thrust generated by the repulsion. The precise distance judgment mechanism ensures that the state of the fresh-keeping compartment can be accurately identified, improving the user experience.

[0062] Specifically, the magnetic attraction component performs repulsion to cause the fresh-keeping bin to begin to open, including: The speed of opening the fresh-keeping bin is set, and the magnetic force between the electromagnetic winding 9 and the second magnetic device 8 during the opening process of the fresh-keeping bin is determined by the speed of opening the fresh-keeping bin, and then the magnitude of the second current input into the electromagnetic winding 9 is determined; During the process of opening the fresh-keeping bin, the magnitude of the second current input into the electromagnetic winding 9 is gradually increased, so that the magnetic force between the electromagnetic winding 9 and the second magnetic device 8 remains unchanged during the process of opening the fresh-keeping bin.

[0063] Furthermore, the calculation process of the second current is the same as the calculation of the first current. The magnetic force between the electromagnetic winding 9 and the second magnetic device 8 is determined by setting the speed at which the fresh-keeping bin opens, and then the second current input to the electromagnetic winding 9 is determined. This enables the opening speed of the fresh-keeping bin to be accurately controlled as needed to avoid the risks of items falling or colliding due to too fast an opening speed, or the use efficiency being affected by too slow an opening speed. During the opening process of the fresh-keeping bin, the second current input to the electromagnetic winding 9 is gradually increased to keep the magnetic force between the electromagnetic winding 9 and the second magnetic device 8 unchanged. This method ensures that the fresh-keeping bin is subjected to uniform force during the opening process, avoids vibration or instability caused by sudden changes in the magnetic force, makes the opening process smoother, and further extends the service life of the components.

[0064] It should be further explained that, during the process of opening the fresh-keeping compartment, the distance between the electromagnetic winding 9 and the second magnetic device 8 increases, so that the magnetic attraction between the two decreases. At this time, the second current of the electromagnetic winding 9 is increased, so that the magnetic field of the electromagnetic winding 9 increases, and the magnetic attraction between the electromagnetic winding 9 and the second magnetic device 8 increases, thereby ensuring that the magnetic force between the electromagnetic winding 9 and the second magnetic device 8 remains unchanged.

[0065] Specifically, the magnetic attraction component performs repulsion to cause the fresh-keeping bin to begin to open, and further includes: Determine whether the current distance between the electromagnetic winding 9 and the second magnetic device 8 reaches the second preset distance. If so, the fresh-keeping bin door is opened and the second current input to the electromagnetic winding 9 is stopped; If not, the second current continues to be input into the electromagnetic winding 9 until the distance between the electromagnetic winding 9 and the second magnetic device 8 reaches a second preset distance.

[0066] Preferably, the second preset distance is set to 20 cm in the embodiment, that is, when the fresh-keeping bin is opened and moves, the distance between the electromagnetic winding 9 and the second magnetic device 8 reaches 20 cm, the limit device 12 will open, provide a high-level signal to the controller, and then the controller stops inputting reverse current to the electromagnetic winding 9, so that the electromagnetic winding 9 is demagnetized, and then there is no magnetic repulsion between the electromagnetic winding 9 and the second magnetic device 8, and the fresh-keeping bin stops moving. When the fresh-keeping bin is closed, the limit device 12 will be closed.

[0067] Furthermore, by judging the relationship between the distance between the electromagnetic winding 9 and the second magnetic device 8 and the second preset distance, it is possible to accurately determine whether the fresh-keeping bin door is opened. Only when the distance reaches the second preset distance is the door opening determined to be complete. This precise judgment ensures that the fresh-keeping bin can be fully opened to an appropriate degree, avoiding problems such as incomplete or excessive door opening affecting use or causing component damage. If the distance does not meet the requirement, the current continues to be input until the requirement is met and the input is stopped. This achieves reasonable management of the current, avoids unnecessary current consumption, improves energy efficiency, and also avoids problems such as excessive component wear caused by continuous current input.

[0068] In some specific embodiments, the moving speed of the fresh-keeping bin can be directly set to 5 cm / s in the controller program. When the fresh-keeping bin moves for 4 seconds, that is, 20 cm, the controller cuts off the power to the electromagnetic winding 9, thereby stopping the input of reverse current to the electromagnetic winding.

[0069] Specifically, the control method further includes: Determine whether the distance signal between the magnetic field sensing device 5 and the first magnetic device 6 is less than or equal to the first preset distance, and if so, control the sterilization device 11 to start the preset sterilization mode; If not, determine whether the current sterilization device 11 is turned on, and if so, control the sterilization device 11 to be turned off; If not, no action is performed.

[0070] See also Figure 4 Two sterilization lamps are arranged on the upper wall inside the fresh-keeping bin. When the electromagnetic winding is passed through a forward current, the fresh-keeping bin is in a closed state. When the distance between the square permanent small magnet 19 and the Hall effect sensor 17 is less than or equal to 10 mm, the magnetic field of the small magnet will cause the Hall effect sensor 17 to output a low level. After receiving the low level, the controller starts the preset sterilization mode and controls the two sterilization lamps in the fresh-keeping bin to sterilize. When the electromagnetic winding is passed through a reverse current, the fresh-keeping bin is in an open state. The distance between the square permanent small magnet 19 and the Hall effect sensor 17 is greater than 10 mm. At this time, the sensor will output a high level. When the controller receives the high level, it also determines whether the sterilization lamp is turned on. If it is turned on, the sterilization lamp will be turned off, thereby achieving the effect of automatic switch fresh-keeping bin intelligent sterilization.

[0071] Specifically, the sterilization device includes a sterilization lamp, and the preset sterilization mode includes: The sterilization lamp in the fresh-keeping bin is controlled to remain on at a power state of 6W for 30 minutes, and then the sterilization lamp is controlled to remain on at a power state of 3W for 90 minutes.

[0072] Preferably, the present embodiment sets the sterilization time to 30min and 90min. The on time of 30min and 90min is more suitable in terms of sterilization effect. Under the power of 6W, the strong sterilization state of 30min is to ensure the sterilization effect on the fresh-keeping warehouse. Under the power of 3W, the low-power sterilization state of 90min is to sterilize a small amount of residual fungi after the strong sterilization is completed, while taking into account energy saving.

[0073] See also Figure 5 , Figure 5 The working process of the magnetic automatic switch and the sterilization and fresh-keeping bin opening process in the present invention is described: exist Figure 5 In the figure, port a is the current input end of the electromagnetic winding 9, port b is the current output end of the electromagnetic winding 9, d is the reverse current direction, e is the direction of the equivalent N-pole magnetic field generated by the electromagnetic winding, f includes the magnetic field direction of the N-pole of the permanent magnet strip, and c is the opening movement direction of the fresh-keeping bin; exist Figure 5 In the figure, port a and port b are connected to the controller, and a reverse current is input to the first electromagnetic winding 13 from port a. The reverse current flows out from port b after passing through the two electromagnetic windings. According to the right-hand screw rule, the equivalent N-pole magnetic field generated by the forward current flowing through the two electromagnetic windings has the same direction as the magnetic field of the N-pole of the permanent magnet strip. Therefore, the repulsive force between the electromagnetic winding 9 and the permanent magnet strip 18 will push the fresh-keeping bin to open, and the movement direction of the fresh-keeping bin is the opening direction. The rated power of the first germicidal lamp 15 and the second germicidal lamp 16 are both 3W. The strong sterilization mode means that the two germicidal lamps are turned on at the same time with a rated power of 3W (total power 6W). The general sterilization mode means that the two germicidal lamps are turned on at the same time with half of the rated power 1.5W (total power). Since the fresh-keeping compartment is in the open state, the two germicidal lamps are in the off state, and the toggle switch (switch device) is in the internal conduction state. When the fresh-keeping compartment is opened, the distance between the Hall effect sensor 17 and the square permanent small magnet 19 will change. At this time, the Z axis of the Hall effect sensor changes. When the Z axis of the Hall effect sensor changes and the distance is close to the critical point of 10mm, a high level will be output, and the controller will control the on and off of the germicidal lamp.

[0074] See also Figure 6 , Figure 6 The working process of the magnetic automatic switch and the sterilization and fresh-keeping bin closing process in the present invention is described: exist Figure 6 middle, and Figure 5 The difference between the open state of the fresh-keeping bin and the open state of the fresh-keeping bin is that port a is the current output end of the electromagnetic winding 9, port b is the current input end of the electromagnetic winding 9, g is the forward current direction, h is the direction of the equivalent S-pole magnetic field generated by the electromagnetic winding 9, and k is the closing movement direction of the fresh-keeping bin.

[0075] exist Figure 6 In the example, the controller inputs a forward current to the first electromagnetic winding 13 from the b port, and the forward current flows out from the a port after passing through the two electromagnetic windings. At this time, the equivalent S-pole magnetic field generated by the forward current flowing through the two electromagnetic windings is opposite to the magnetic field of the N-pole of the permanent magnet strip. Therefore, the suction force between the electromagnetic winding and the permanent magnet strip will push the fresh-keeping bin to close, and the movement direction of the fresh-keeping bin is the closing direction. Since the fresh-keeping bin is in the closed state, each germicidal lamp will maintain the rated power of 3W (total power 6W) for sterilization for 30 minutes, and then maintain the power of 1.5W for sterilization for 90 minutes, and then go out. The toggle switch (switch device) is in the internal disconnection state. When the fresh-keeping bin is closed, the Z-axis of the Hall effect sensor 17 changes and the distance is close to the critical point of 10mm, it will output a low level, and then the controller will control the on and off of the germicidal lamp.

[0076] See also Figure 3-Figure 6 The working principle of the present invention is explained below by using specific examples: The refrigerator fresh-keeping bin with automatic switch and intelligent sterilization in the present invention can realize that the fresh-keeping bin keeps closing automatically at a slow speed, and closes tightly and seamlessly to prevent bacteria from entering; it can also make the fresh-keeping bin open automatically at a slow speed, so that it stops when it reaches a fixed position, which is convenient and fast; at the same time, the Hall effect sensor 17 is used to detect the vertical distance between the square permanent small magnet 19 in the forearm of the fresh-keeping bin and the Hall effect sensor 17, output a high level or a low level, and feed it back to the controller to intelligently control the sterilization mode of the germicidal lamp. The specific working process is as follows: Step 1: A permanent magnet strip 18 is built into the rear wall 2 of the refrigerator fresh-keeping bin, and two electromagnetic windings connected to the controller are set on the inner wall of the refrigerator behind the fresh-keeping bin. The function of the permanent magnet strip 18 and the electromagnetic winding 9 is to have sufficient magnetic force to push and attract the fresh-keeping bin, thereby controlling the fresh-keeping bin to automatically close and open; Step 2: The outer ring of the electromagnetic winding 9 is provided with a shielding ring 10 that only exposes the side facing the fresh-keeping compartment, so as to minimize the influence of the magnetic force generated by the electromagnetic winding 9 on other parts of the refrigerator; Step 3: a small square permanent magnet 19 is arranged inside the front wall 1 of the fresh-keeping bin, a Hall effect sensor 17 and a toggle switch (switch device 7) are arranged behind the front wall 1 of the fresh-keeping bin, and two germicidal lamps are arranged on the upper wall inside the fresh-keeping bin, and the rated power of each germicidal lamp is 3W; Step 4: The user controls the toggle switch on the fresh-keeping bin to turn it on. At the same time, it is determined whether the vertical distance between the Hall effect sensor 17 and the small square permanent magnet 19 is greater than 10 mm. If so, the controller inputs a positive current to the electromagnetic winding 9, and the electromagnetic winding 9 generates a magnetic field with a polarity opposite to that of the permanent magnet strip 18. The electromagnetic winding 9 and the permanent magnet strip 18 attract each other, and the fresh-keeping bin begins to close under the influence of the magnetic force. Step 5: At this time, the fresh-keeping bin is in the open state. At this time, the vertical distance between the Hall effect sensor 17 and the small square permanent magnet 19 is greater than 10 mm. The Hall effect sensor 17 outputs a high level. After receiving the high level, the controller determines whether the germicidal lamp is turned on. If the germicidal lamp is turned on, it is turned off; Step 6: Set the gentle closing speed of the fresh-keeping bin, determine the magnitude of the magnetic force between the electromagnetic winding 9 and the permanent magnet strip 18, and then determine the magnitude of the forward current passing through the electromagnetic winding 9 according to the magnetic force. The controller gradually weakens the input of the forward current to the electromagnetic winding 9, so that the magnetic force between the electromagnetic winding 9 and the permanent magnet strip 18 remains basically unchanged; Step 7: The fresh-keeping bin automatically closes at a slow speed until it is tightly and seamlessly closed, that is, the vertical distance between the Hall effect sensor 17 and the small square permanent magnet 19 is less than or equal to 10 mm, and the forward current input to the electromagnetic winding 9 is stopped; Step 8: The user controls the toggle switch to disconnect it, and the controller inputs a reverse current to the electromagnetic winding 9, and the electromagnetic winding 9 generates a magnetic field with the same polarity as the permanent magnet strip 18. The electromagnetic winding 9 and the permanent magnet strip 18 repel each other, and the fresh-keeping bin begins to open under the influence of the magnetic force; Step 9: At this time, the fresh-keeping bin is in a closed state, the distance between the square permanent small magnet 19 and the Hall effect sensor 17 is less than or equal to 10 mm, and the Hall effect sensor 17 outputs a low level. After receiving the low level, the controller starts the strong sterilization mode, controls the two sterilization lamps in the fresh-keeping bin to keep the 6W power state on for 30 minutes, and then controls the two sterilization lamps to keep the 3W power state on for 90 minutes; Step 10: The controller gradually increases the input of the reverse current of the electromagnetic winding 9 so that the magnetic force between the electromagnetic winding 9 and the permanent magnet strip 18 remains substantially unchanged; Step 11: The fresh-keeping bin opens automatically at a slow speed until it is ejected to a fixed distance, that is, when the distance between the permanent magnet strip 18 and the electromagnetic winding 9 is 20 cm, the reverse current input to the electromagnetic winding 9 is stopped. This fixed distance can be adjusted according to actual conditions.

[0077] It should be noted here that the present embodiment provides a control method, which receives an instruction for opening or closing the fresh-keeping bin input by the user through a switch device; obtains a distance signal between the magnetic field sensing device and the first magnetic device; and controls the fresh-keeping bin to automatically open or close according to the instruction and the vertical distance, thereby solving the technical problem in the prior art that manually opening and closing the fresh-keeping bin may cause the fresh-keeping bin to be loosely sealed, easily breed bacteria, and thus affect the fresh-keeping effect. The present invention can automatically control the closing and opening of the fresh-keeping bin, ensure that the fresh-keeping bin can be tightly closed, reduce the chance of bacterial growth, and thus further improve the fresh-keeping effect, and automatically control the opening and closing of the fresh-keeping bin according to the vertical distance between the magnetic field sensing device and the first magnetic device, and combine with the sterilization device to achieve a sterilization effect, and do not perform unnecessary sterilization operations when sterilization is not needed, thereby avoiding waste of electric energy and greatly improving energy utilization efficiency.

[0078] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0079] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0080] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0081] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0082] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A refrigeration device, comprising a fresh-keeping bin, wherein the fresh-keeping bin comprises a fresh-keeping bin front wall (1) and a fresh-keeping bin rear wall (2), characterized in that: The refrigeration equipment also includes: A magnetic field sensing device (5), and a first magnetic device (6) arranged within the sensing range of the magnetic field sensing device (5); wherein the magnetic field sensing device (5) is arranged on the front wall (1) of the fresh-keeping bin and is used to detect a distance signal between itself and the first magnetic device (6); A magnetic suction component, arranged on the rear wall (2) of the fresh-keeping bin; A switch device (7) is arranged on the front wall (1) of the fresh-keeping bin and is used to issue instructions for opening and closing the fresh-keeping bin; The controller is used to control the attraction or repulsion of the magnetic attraction component to open or close the fresh-keeping bin according to the instruction for opening and closing the fresh-keeping bin issued by the switch device and the distance signal detected by the magnetic field sensing device (5), so as to open and close the fresh-keeping bin.

2. The refrigeration equipment according to claim 1, characterized in that: The magnetic attraction component comprises: A second magnetic device (8) is arranged on the inner side of the rear wall (2) of the fresh-keeping bin; The electromagnetic winding (9) is arranged on the outside of the rear wall (2) of the fresh-keeping bin, the electromagnetic winding (9) is connected to the controller for control, and a shielding ring (10) is arranged on the periphery of the electromagnetic winding (9) for isolating the electromagnetic winding (9) from other components in the fresh-keeping bin.

3. The refrigeration device according to claim 2, wherein the fresh-keeping bin comprises a slide rail (4), characterized in that: The refrigeration equipment also includes: A limit device (12) is arranged on the slide rail (4) and is used to detect the distance between the electromagnetic winding (9) and the second magnetic device (8).

4. The refrigeration equipment according to claim 3, characterized in that: The refrigeration equipment also includes: The sterilizing device (11) is arranged inside the fresh-keeping bin and is control-connected to the controller, and is used to sterilize the internal area of ​​the fresh-keeping bin.

5. The refrigeration equipment according to claim 4, characterized in that: The magnetic field sensing device (5) comprises a Hall effect sensor (17); The first magnetic device (6) comprises a small square permanent magnet (19), and the second magnetic device (8) comprises a long permanent magnet strip (18); The sterilization device (11) comprises a sterilization lamp.

6. The refrigeration device according to any one of claims 1 to 5, characterized in that: include: Refrigerators, fresh-keeping cabinets, refrigerated display cabinets, and air curtain display cabinets.

7. A control method, characterized in that: include: S100, receiving an instruction for opening or closing the fresh-keeping bin issued by a user via a switch device (7); S200, obtaining a distance signal between the magnetic field sensing device (5) and the first magnetic device (6), detected by the magnetic field sensing device (5); S300: According to the instruction and the distance signal, control the attraction or repulsion of the magnetic attraction component to open and close the fresh-keeping bin.

8. The control method according to claim 7, characterized in that: The S300 includes: If the received instruction is a fresh-keeping bin closing instruction, determining whether the distance signal between the magnetic field sensing device (5) and the first magnetic device (6) is greater than a first preset distance, and if so, controlling the magnetic attraction component to attract, thereby causing the fresh-keeping bin to start closing; If not, the magnetic attraction component is not controlled to be attracted.

9. The control method according to claim 8, characterized in that: The controlling the magnetic attraction component to be attracted, thereby causing the fresh-keeping bin to start closing, includes: The controller controls the first current input into the electromagnetic winding (9) so that the electromagnetic winding (9) generates a magnetic field with a polarity opposite to that of the second magnetic device (8), thereby causing the magnetic attraction component to be attracted and causing the fresh-keeping bin to begin to close.

10. The control method according to claim 9, characterized in that: The magnetic attraction component is attracted to close the fresh-keeping bin, including: Setting a closing speed of the fresh-keeping bin, determining the magnetic force between the electromagnetic winding (9) and the second magnetic device (8) during the closing process of the fresh-keeping bin through the closing speed of the fresh-keeping bin, and further determining the magnitude of the first current input into the electromagnetic winding (9); During the process of closing the fresh-keeping bin, the magnitude of the first current input to the electromagnetic winding (9) is gradually reduced, so that the magnetic force between the electromagnetic winding (9) and the second magnetic device (8) remains unchanged during the process of closing the fresh-keeping bin.

11. The control method according to claim 8, characterized in that: The magnetic attraction component is attracted to close the fresh-keeping bin, and the method further comprises: Determining whether the distance signal between the current magnetic field sensing device (5) and the first magnetic device (6) is less than or equal to a first preset distance, and if so, the fresh-keeping compartment door is closed and the input of the first current to the electromagnetic winding (9) is stopped; If not, the first current continues to be input into the electromagnetic winding (9) until the distance signal between the magnetic field induction device (5) and the first magnetic device (6) is less than or equal to the first preset distance.

12. The control method according to claim 7, characterized in that: The S300 further includes: If the received instruction is a fresh-keeping bin opening instruction, determining whether the distance signal between the magnetic field sensing device (5) and the first magnetic device (6) is less than or equal to a first preset distance, and if so, controlling the magnetic attraction component to repel, thereby causing the fresh-keeping bin to begin to open; If not, the magnetic attraction component is not controlled to repel.

13. The control method according to claim 12, characterized in that: The controlling the magnetic attraction component to repel, thereby causing the fresh-keeping bin to begin to open, includes: The controller controls the second current input into the electromagnetic winding (9) so that the electromagnetic winding (9) generates a magnetic field with the same polarity as the second magnetic device (8), thereby causing the magnetic attraction component to repel and causing the fresh-keeping bin to begin to open.

14. The control method according to claim 13, characterized in that: The magnetic attraction component repels and causes the fresh-keeping bin to begin to open, including: Setting a speed at which the fresh-keeping bin opens, determining the magnetic force between the electromagnetic winding (9) and the second magnetic device (8) during the process of opening the fresh-keeping bin door through the speed at which the fresh-keeping bin opens, and further determining the magnitude of the second current input into the electromagnetic winding (9); During the process of opening the fresh-keeping bin, the magnitude of the second current input into the electromagnetic winding (9) is gradually increased, so that the magnetic force between the electromagnetic winding (9) and the second magnetic device (8) remains unchanged during the process of opening the fresh-keeping bin.

15. The control method according to claim 14, characterized in that: The magnetic attraction component repels so that the fresh-keeping bin begins to open, and further comprises: Determining whether the current distance between the electromagnetic winding (9) and the second magnetic device (8) reaches a second preset distance; if so, the fresh-keeping bin door is opened and the input of the second current to the electromagnetic winding (9) is stopped; If not, the second current continues to be input into the electromagnetic winding (9) until the distance between the electromagnetic winding (9) and the second magnetic device (8) reaches a second preset distance.

16. The control method according to claim 7, characterized in that: The control method further comprises: Determining whether the distance signal between the magnetic field sensing device (5) and the first magnetic device (6) is less than or equal to a first preset distance, and if so, controlling the sterilization device (11) to start a preset sterilization mode; If not, determining whether the current sterilization device (11) is turned on, and if so, controlling the sterilization device (11) to be turned off; If not, no action is performed.

17. The control method according to claim 16, characterized in that: The sterilization device (11) comprises a sterilization lamp, and the preset sterilization mode comprises: The sterilization lamp in the fresh-keeping bin is controlled to remain on at a power state of 6W for 30 minutes, and then the sterilization lamp is controlled to remain on at a power state of 3W for 90 minutes.

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