Fresh-keeping drawer, refrigerator and fresh-keeping method

Abstract

The invention discloses a fresh-keeping drawer, a refrigerator and a fresh-keeping method, the fresh-keeping drawer comprises a shell, a drawer arranged in the shell, an air interchanger installed on the shell, a controller and a camera assembly used for shooting fruits and vegetables, and the air interchanger is used for communicating the drawer with the external environment; a conveyor belt is laid at the bottom in the drawer, the top surface of the conveyor belt serves as a fruit and vegetable placement surface, the conveyor belt is connected with a power mechanism driving the conveyor belt to move, and the power mechanism and the camera assembly are electrically connected with the controller; the controller receives an image signal of the camera assembly and controls the power mechanism to enable the conveying belt to move. The movable conveying belt is introduced, a traditional static storage mode is broken through, fruits and vegetables on the lower layer in the drawer can be periodically exposed in fresh air flow, air distribution in the drawer is more uniform, and the fresh-keeping quality is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of food preservation and storage technology, and in particular to food preservation drawers, refrigerators, and food preservation methods. Background Technology

[0002] In the field of fruit and vegetable preservation and storage technology, low-pressure storage technology has been widely used as an effective means of inhibiting the respiration and metabolism of fruits and vegetables, extending their shelf life by reducing the oxygen concentration in the storage environment. However, traditional low-pressure storage systems typically employ a static, sealed structure, which has significant drawbacks in practical applications: as fruits and vegetables continue to respire, the carbon dioxide concentration in the storage environment accumulates, and the sealed structure makes it difficult to achieve effective gas circulation. Especially when fruits and vegetables are stacked in multiple layers in a drawer, those on the lower layers are more susceptible to carbon dioxide poisoning due to insufficient contact with fresh air, leading to accelerated spoilage.

[0003] While some existing preservation equipment includes ventilation capabilities, most employ a fixed-frequency ventilation mode, failing to adequately consider the varying respiration rates of different types of fruits and vegetables. For instance, leafy vegetables and fruiting vegetables exhibit significantly different respiration rates, and traditional equipment lacks corresponding adaptive adjustment mechanisms. Furthermore, the airflow organization within the drawers is often poorly designed, with fresh air frequently circulating only on the surface and failing to penetrate to the lower layers of fruits and vegetables. This uneven gas distribution leaves the lower-layer fruits and vegetables in a consistently oxygen-deficient and carbon dioxide-rich environment, significantly reducing preservation effectiveness.

[0004] Therefore, how to design preservation drawers, refrigerators, and preservation methods that can improve the quality of fruit and vegetable preservation is a technical problem that the industry urgently needs to solve. Summary of the Invention

[0005] To address the shortcomings of poor preservation of fruits and vegetables in the lower compartments of existing drawers, this invention proposes a preservation drawer, a refrigerator, and a preservation method. By introducing a movable conveyor belt, the traditional static storage mode is broken, allowing the fruits and vegetables in the lower compartments of the drawer to be periodically exposed to fresh airflow. This results in a more uniform gas distribution within the drawer and significantly improves preservation quality.

[0006] The technical solution adopted in this invention is to design a fresh-keeping drawer, including: an outer shell, a drawer located inside the outer shell, and a ventilation device installed on the outer shell. The ventilation device is used to connect the drawer with the external environment. A conveyor belt is laid at the bottom inside the drawer, and the top surface of the conveyor belt serves as a surface for placing fruits and vegetables. The conveyor belt is connected to a power mechanism that drives its movement.

[0007] Furthermore, the refrigerated drawer also includes a controller and a camera assembly for photographing fruits and vegetables. Both the power mechanism and the camera assembly are electrically connected to the controller. The controller receives image signals from the camera assembly and controls the power mechanism to move the conveyor belt.

[0008] Furthermore, the camera assembly includes: an external camera located outside the drawer and an internal camera located inside the drawer. The external camera is used to capture images of the user storing or taking out fruits and vegetables, and the internal camera is used to capture images of the upper layer of fruits and vegetables inside the drawer. The controller receives the images captured by the external camera and the internal camera, determines the type parameters of the lower layer of fruits and vegetables inside the drawer, and controls the power mechanism according to the type parameters of the lower layer of fruits and vegetables.

[0009] Furthermore, the ventilation device is electrically connected to the controller, which receives images captured by the camera assembly, determines the total number of fruit and vegetable types in the drawer, and controls the ventilation device based on the total number of fruit and vegetable types.

[0010] Furthermore, the food storage drawer also includes a vacuum pump for extracting air from the drawer and an oxygen sensor for detecting the oxygen concentration C inside the drawer. The controller of the food storage drawer receives the detection signal from the oxygen sensor and controls the vacuum pump.

[0011] Furthermore, the food storage drawer also includes: a refrigeration system for supplying cooling to the drawer, and a temperature sensor for detecting the temperature T inside the drawer. The controller of the food storage drawer receives the detection signal from the temperature sensor and controls the refrigeration system.

[0012] In some embodiments, the power mechanism includes: a rotating shaft mounted on the conveyor belt, a driven gear coaxially fixed with the rotating shaft, a driving gear meshing with the driven gear, and a motor that drives the driving gear to move, wherein the motor drives the conveyor belt to move when it is turned on.

[0013] The present invention also proposes a refrigerator, including: a refrigerator compartment, wherein the refrigerator compartment is provided with the above-mentioned fresh-keeping drawer.

[0014] The present invention also proposes a preservation method, which is applied to the above-mentioned preservation drawer, comprising:

[0015] Establish a preliminary correlation between the parameters of the types of fruits and vegetables in the lower layer and the start time of the movement;

[0016] Collect parameters of the types of fruits and vegetables in the lower drawer;

[0017] The corresponding start time of movement is obtained from the first control relationship based on the parameters of the types of fruits and vegetables in the lower layer;

[0018] The power mechanism is activated at the start time of exercise and deactivated when the set exercise time is reached.

[0019] Furthermore, preservation methods also include:

[0020] A second control relationship between total fruit and vegetable species parameters and ventilation interval time was established in advance;

[0021] Collect the total number of fruit and vegetable types in the drawer;

[0022] The corresponding ventilation interval time was obtained from the second control relationship based on the total fruit and vegetable species parameters;

[0023] The ventilation device is turned on according to the ventilation interval and turned off when the set ventilation time is reached.

[0024] Compared with the prior art, the present invention has at least one of the following technical effects:

[0025] 1. By setting a movable conveyor belt at the bottom of the drawer to move the fruits and vegetables, air exchange gaps can be created during the movement of the fruits and vegetables, which can achieve uniform ventilation of the fruits and vegetables, prevent the fruits and vegetables at the bottom from rotting due to lack of oxygen, and achieve the technical effect of improving the overall freshness preservation efficiency.

[0026] 2. By controlling the conveyor belt and ventilation device according to the parameters of different types of fruits and vegetables, the ventilation frequency of fruits and vegetables with different gas production intensities can be matched, which can effectively control the carbon dioxide concentration, avoid gas poisoning, and achieve the technical effect of extending the shelf life. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0028] Figure 1 This is a schematic diagram of the structure of the food storage drawer of the present invention when it is opened;

[0029] Figure 2 This is a schematic diagram of the structure of the food storage drawer when it is closed;

[0030] Figure 3 This is a schematic diagram of the internal structure of the drawer of the present invention;

[0031] Figure 4 This is a top view of the drawer of the present invention;

[0032] Figure 5 This is a schematic diagram of the interior of the food storage drawer of the present invention;

[0033] Figure 6 yes Figure 3 Enlarged view of point A in the middle;

[0034] Figure 7 This is an internal schematic diagram of the refrigerator of the present invention;

[0035] Figure 8 This is a schematic flowchart of the preservation method of the present invention;

[0036] Explanation of reference numerals in the attached drawings: 1. Outer casing; 2. Drawer; 3. Ventilation device; 4. Suction pipe; 5. Vacuum pump; 6. Exhaust pipe; 7. Camera assembly; 8. Sensor assembly; 9. Conveyor belt; 10. Rotating shaft; 11. Gear assembly; 12. Bearing; 13. Bearing bore. Detailed Implementation

[0037] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] like Figures 1 to 3 As shown, the food preservation drawer proposed in this invention includes: an outer shell 1, a drawer 2, a ventilation device 3, a conveyor belt 9, and a power mechanism.

[0039] Drawer 2 is located inside the outer shell 1 and is used to store food such as fruits and vegetables. Drawer 2 is usually installed by pulling out.

[0040] The ventilation device 3 is installed on the outer casing 1. The ventilation device 3 can be a ventilation valve. When the ventilation valve is opened, it connects the external environment of the outer casing 1 with the drawer 2. Using a ventilation valve can improve the response speed, achieve precise control of the opening and closing state, and has a simple structure, low failure rate and low energy consumption. It is particularly suitable for intermittent ventilation needs and avoids unnecessary energy waste.

[0041] like Figure 3 , Figure 4 As shown, the conveyor belt 9 is laid at the bottom of the drawer 2, and its top surface serves as the fruit and vegetable placement surface. That is, the fruits and vegetables are stacked on the conveyor belt 9. The size of the conveyor belt 9 matches the inner cavity of the drawer 2. Only a gap is reserved between the four sides of the conveyor belt 9 and the inner wall of the drawer 2 to allow the conveyor belt 9 to move, so as to prevent the fruits and vegetables from falling.

[0042] The power mechanism is connected to the conveyor belt 9. When it is turned on, it drives the conveyor belt 9 to move. When the conveyor belt 9 moves, it can drive the fruits and vegetables to move, causing the relative positions between the stacked fruits and vegetables to change, thereby creating an air exchange gap, allowing the lower layer of fruits and vegetables to come into contact with fresh air and avoid anaerobic respiration.

[0043] This design uses a movable conveyor belt 9 at the bottom of drawer 2 to move fruits and vegetables. Fresh air is no longer limited to surface circulation, but permeates downward from the air exchange gaps generated during the movement of fruits and vegetables. This achieves uniform ventilation of fruits and vegetables, prevents the bottom fruits and vegetables from rotting due to lack of oxygen, and improves the overall preservation efficiency.

[0044] like Figure 5As shown, in a preferred embodiment of the present invention, the food storage drawer further includes a controller and a camera assembly 7. Both the camera assembly 7 and the power mechanism are electrically connected to the controller. The camera assembly 7 captures images of the fruits and vegetables. The controller receives the image signals from the camera assembly 7 and controls the power mechanism to move the conveyor belt 9. In practical applications, the controller automatically identifies the types of fruits and vegetables (such as leafy greens and fruiting vegetables) and their characteristics (such as respiration intensity) through the camera, and automatically matches the optimal motion state (such as the start and stop timing, running speed, and duration of the conveyor belt).

[0045] Common fruit and vegetable classifications are as follows:

[0046] Fruit and vegetable varieties code Representative fruits and vegetables low respiratory intensity S1 Apples, citrus fruits, kiwifruit, persimmons, pineapples, celery, cantaloupe, papaya, onions, potatoes, sweet potatoes, etc. medium respiratory intensity S2 Apricots, blueberries, cabbage, cherries, cucumbers, peaches, plums, pears, zucchini, tomatoes, carrots, radishes, etc. High respiratory intensity S3 Cauliflower, chives, bean sprouts, artichokes, cabbage, green beans, asparagus, mushrooms, spinach, sweet corn, peas, parsley, etc.

[0047] For example, for plants with high respiration rates such as spinach and cabbage, the controller can increase the frequency of the conveyor belt 9 to ensure adequate ventilation; for plants with low respiration rates such as apples and potatoes, the frequency of the conveyor belt 9 can be appropriately reduced to save energy.

[0048] This design incorporates the controller and camera component 7 into the preservation drawer. The camera component 7 senses the state of the fruits and vegetables stored in the drawer 2, and the controller makes decisions based on the state of the fruits and vegetables. Finally, the conveyor belt 9 executes the decisions, thereby achieving intelligent and precise preservation management.

[0049] Based on automated control, the preferred solution is that the camera assembly 7 includes an external camera and an internal camera. The external camera is located outside the drawer 2 and its function is to capture images of the user storing or retrieving fruits and vegetables, recording the increase or decrease of fruits and vegetables in real time.

[0050] In actual use, the refrigerated drawer is equipped with a prompting device, including but not limited to a voice prompt device. A sensor switch for detecting drawer opening and closing is installed between drawer 2 and outer shell 1. Both the sensor switch and the prompting device are electrically connected to the controller. The controller receives the detection signal from the sensor switch and controls the prompting device to issue a prompt. Taking the voice prompt device as an example, when the user opens drawer 2 to put in fruits and vegetables, the controller instructs the voice prompt device to play a prompt tone. The user then places the fruits and vegetables in front of the external camera for filming according to the voice prompt. The external camera starts filming when it senses hand movement and stops filming when the user puts the fruits and vegetables in the drawer. For smaller fruits and vegetables such as bean sprouts and blueberries, a tray or other container can be used for support. The total volume of the container in the film is subtracted from the empty space for fuzzy calculation.

[0051] An internal camera is located inside drawer 2 and its function is to capture images of the upper layer of fruits and vegetables inside drawer 2. The controller receives images from both the external and internal cameras, determines the type parameters of the lower layer of fruits and vegetables inside drawer 2, and controls the power mechanism based on these parameters. Specifically, the controller performs fuzzy calculations by subtracting the upper layer's type parameters from the total type parameters of the fruits and vegetables inside drawer 2 to obtain the lower layer's type parameters, thus achieving comprehensive and real-time perception of the environment inside drawer 2.

[0052] This design, through the coordinated layout of external and internal cameras, enables the controller to accurately infer the type parameters of the fruits and vegetables in the lower layer based on image recognition technology, and then dynamically adjust the conveyor belt movement strategy. This intelligent control mechanism driven by visual feedback not only solves the problem of ventilation blind spots in the lower layer caused by the stacking of fruits and vegetables in traditional refrigeration drawers, but also achieves personalized preservation tailored to different fruit and vegetable categories, significantly reducing energy consumption while improving preservation uniformity (avoiding localized anaerobic respiration).

[0053] In a preferred embodiment of the present invention, the ventilation device 3 is electrically connected to the controller. The controller receives images captured by an external camera, determines the total number of fruit and vegetable varieties in drawer 2, and controls the ventilation device based on these parameters. For example, when the camera detects a high proportion of fruits and vegetables with vigorous respiration (such as spinach), the controller automatically increases the ventilation frequency to ensure timely removal of carbon dioxide; conversely, for fruits and vegetables with good storage properties (such as potatoes), the ventilation frequency is reduced to save energy. This dynamic control based on the total number of varieties effectively avoids energy waste caused by insufficient ventilation leading to localized anaerobic respiration or excessive ventilation in traditional systems, thus improving preservation efficiency.

[0054] This design introduces fresh air into drawer 2 by periodically activating the ventilation device 3, while simultaneously expelling excess carbon dioxide produced by the respiration of fruits and vegetables. The ventilation device adjusts its frequency based on the type of fruit or vegetable identified by the camera component 7, taking into account the varying respiration rates of different fruits and vegetables. For example, when fruits and vegetables with high respiration rates are detected, the ventilation frequency is increased to prevent carbon dioxide buildup in drawer 2 and subsequent spoilage. Furthermore, when fruits and vegetables are stacked, especially in the tightly packed, poorly ventilated lower sections, heat is difficult to dissipate, leading to increased temperatures in those areas. Therefore, the airflow generated during the ventilation process promotes a more even distribution of coolness inside drawer 2, preventing significant temperature differences between the upper and lower sections and eliminating or reducing the heat island effect within drawer 2.

[0055] It should be understood that the image recognition technologies involved in this article are all existing technologies, such as those disclosed in publication numbers CN117746304B and CN117690071A. In practical applications, known solutions can also be selected to achieve the same function. The focus of this invention is on the periodic control of the conveyor belt and ventilation device, and no special restrictions are placed on the specific identification method for fruit and vegetable types.

[0056] like Figure 2 , Figure 5 As shown, in some embodiments of the present invention, a sensor assembly 8 is further provided inside the outer casing 1. The sensor assembly 8 includes an oxygen sensor. The food storage drawer is also equipped with a vacuum pump 5. Both the vacuum pump 5 and the oxygen sensor are electrically connected to the controller. The inlet of the vacuum pump 5 is connected to the inside of the drawer 2 through an air extraction pipe 4, and the outlet of the vacuum pump 5 is connected to the external environment through an air outlet pipe 6. When the vacuum pump 5 is turned on, it extracts air from the drawer 2. The oxygen sensor is used to detect the oxygen concentration C in the drawer 2. The controller receives the detection signal from the oxygen sensor and controls the vacuum pump 5. For example, the oxygen sensor monitors the oxygen concentration C in the drawer 2 in real time. When the oxygen concentration exceeds the preset concentration range C0, the controller instructs the vacuum pump 5 to start working. When the oxygen concentration C reaches the preset concentration range C0, the controller instructs the vacuum pump 5 to stop working.

[0057] This design actively regulates the internal environment of drawer 2 through vacuum pump 5 and oxygen sensor, maintaining the oxygen concentration in drawer 2 within a preset range, thereby reducing the respiration intensity of fruits and vegetables, effectively delaying the metabolic aging process, and extending the shelf life of fruits and vegetables; in addition, vacuum pump 5 can quickly expel harmful gases such as carbon dioxide from the drawer, reducing the concentration of harmful gases in drawer 2 and preventing fruits and vegetables from spoiling.

[0058] As an optimization, sensor assembly 8 also includes a temperature sensor. The crisper drawer is equipped with a refrigeration system. Both the refrigeration system and the temperature sensor are electrically connected to the controller. When the refrigeration system is working, it provides cooling to the crisper drawer, lowering its internal temperature. This refrigeration system is typically the refrigeration system of the refrigeration equipment in which the crisper drawer is located, including but not limited to the refrigeration system of a refrigerator. The temperature sensor is used to detect the temperature T inside the drawer 2. The controller receives the detection signal from the temperature sensor and controls the refrigeration system. For example, the temperature sensor monitors the temperature T inside the drawer 2 in real time. When the temperature T exceeds the preset temperature range T0, the controller instructs the refrigeration system to turn on the refrigeration to cool the drawer 2. When the temperature T reaches the preset temperature range T0, the controller instructs the refrigeration system to stop the refrigeration.

[0059] This design actively regulates the internal temperature of drawer 2 through a refrigeration system and a temperature sensor, keeping the temperature fluctuation range of drawer 2 within a preset temperature range, thus keeping the respiration intensity of fruits and vegetables at a minimum level and extending their shelf life.

[0060] like Figure 3, Figure 6 As shown, in some embodiments of the present invention, the power mechanism includes a rotating shaft 10, a gear assembly 11, and a motor. The gear assembly 11 consists of a driven gear and a driving gear that mesh and drive each other. The pulley of the conveyor belt 9 is fixedly mounted on the rotating shaft 10. A bearing 12 is sleeved on the end of the rotating shaft 10. The side wall of the drawer 2 is provided with a bearing hole 13. The bearing 12 passes through the bearing hole 13 and is fixed inside the drawer 2, forming a movable support point for the conveyor belt 9. The driven gear is coaxially fixed with the rotating shaft 10, and the driving gear is fixedly mounted on the output shaft of the motor. When the motor is turned on, it drives the driving gear to rotate, and then the driven gear and the rotating shaft 10 transmit the motion to the pulley of the conveyor belt 9. When the pulley rotates, it drives the conveyor belt 9 to move, and the fruits and vegetables placed on the top surface of the conveyor belt 9 are forced to adjust their relative positions to create ventilation gaps.

[0061] This design uses gear transmission to convert the motor speed into linear motion of the conveyor belt 9. The speed of the conveyor belt 9 is adjustable, which makes the gaps between fruits and vegetables controllable and ensures the freshness of fruits and vegetables.

[0062] like Figure 7 As shown, the present invention also proposes a refrigerator, including: a refrigerator compartment, the refrigerator compartment being equipped with the aforementioned fresh-keeping drawer, the fresh-keeping drawer being provided with cooling capacity by the refrigerator's refrigeration system. The bottom of the drawer 2 of the fresh-keeping drawer is equipped with a movable conveyor belt 9 that moves the fruits and vegetables, creating ventilation gaps during the movement, achieving uniform ventilation of the fruits and vegetables, preventing the fruits and vegetables at the bottom from rotting due to lack of oxygen, and achieving the technical effect of improving overall preservation efficiency.

[0063] Based on this, as an optimization scheme, the conveyor belt 9 and the ventilation device 3 are controlled according to the parameters of the types of fruits and vegetables, so that fruits and vegetables with different gas production intensities can obtain appropriate ventilation frequencies, effectively control carbon dioxide concentration, avoid gas poisoning, and achieve the technical effect of extending the shelf life.

[0064] The present invention also proposes a preservation method for the above-mentioned food preservation drawer, wherein the preservation method is executed by a controller and includes:

[0065] Establish a preliminary correlation between the parameters of the types of fruits and vegetables in the lower layer and the start time of the movement;

[0066] Collect the type parameters of fruits and vegetables in the lower layer of drawer 2;

[0067] The corresponding start time of movement is obtained from the first control relationship based on the parameters of the types of fruits and vegetables in the lower layer;

[0068] The power mechanism is activated to drive the conveyor belt 9 according to the start time of the movement, and the power mechanism is turned off when the set movement time is reached.

[0069] The first correspondence can be designed according to specific needs, as shown in the table below:

[0070] motion code Lower layer fruit and vegetable distribution Should we activate the track movement? 1 V 高 V 中 V 低 ]]> yes 2 <![CDATA[V 高 >V 低 >V 中 ]]> yes 3 <![CDATA[V 中 >V 高 >V 低 ]]> Start after 1 hour delay 4 <![CDATA[V 中 >V 低 >V 高 ]]> Starts after 2 hours 5 <![CDATA[V 低 >V 高 >V 中 ]]> Delayed opening for 4 hours 6 <![CDATA[V 低 >V 中 >V 高 ]]> Startup delayed by 6 hours

[0071] Among them, V 低 V represents the volume occupied by type S1 fruits and vegetables in drawer 2. 中 V represents the volume occupied by type S2 fruits and vegetables in drawer 2. 高 This indicates the volume occupied by S3 type fruits and vegetables in drawer 2.

[0072] The more fruits and vegetables with high respiration intensity are placed in drawer 2, the faster the conveyor belt 9 will start. In the table above, movement codes 1 and 2 indicate that fruits and vegetables with high respiration intensity account for the largest proportion, so the conveyor belt 9 needs to be started immediately. Movement codes 3 and 4 indicate that fruits and vegetables with medium respiration intensity account for the largest proportion, so the conveyor belt 9 needs to be started after a shorter delay. Movement codes 5 and 6 indicate that fruits and vegetables with low respiration intensity account for the largest proportion, so the conveyor belt 9 needs to be started after a longer delay.

[0073] This design allows for customized adjustment of the conveyor belt movement strategy based on the characteristics of fruits and vegetables (such as respiration intensity), enabling the continuous generation of uniform ventilation gaps between fruits and vegetables, effectively promoting gas circulation, preventing localized carbon dioxide accumulation, improving the freshness of fruits and vegetables, and reducing unnecessary energy consumption through on-demand movement, thereby reducing the overall power consumption of the freshness drawer.

[0074] In a preferred embodiment of the present invention, the preservation method further includes:

[0075] A second control relationship between total fruit and vegetable species parameters and ventilation interval time was established in advance;

[0076] Collect the total fruit and vegetable types parameters in drawer 2;

[0077] The corresponding ventilation interval time was obtained from the second control relationship based on the total fruit and vegetable species parameters;

[0078] The ventilation device 3 is turned on according to the ventilation interval and turned off when the set ventilation time is reached.

[0079] The second matching relationship can be designed according to specific needs, as shown in the table below:

[0080] ventilation code Fruit and vegetable volume ratio Ventilation interval (h) 1 <![CDATA[V 高 >V 中 >V 低 ]]> 2～4 2 <![CDATA[V 高 >V 低 >V 中 ]]> 4～6 3 <![CDATA[V 中 >V 高 >V 低 ]]> 6～8 4 <![CDATA[V 中 >V 低 >V 高 ]]> 8～10 5 <![CDATA[V 低 >V 高 >V 中 ]]> 9～11 6 <![CDATA[V 低 >V 中 >V 高 ]]> 10～12

[0081] Among them, V 低 V represents the volume occupied by type S1 fruits and vegetables in the drawer. 中 V represents the volume occupied by type S2 fruits and vegetables in the drawer. 高 This indicates the volume occupied by S3 type fruits and vegetables in the drawer.

[0082] Among the fruits and vegetables placed in the drawer, the higher the proportion of fruits and vegetables with high breathing intensity, the shorter the ventilation interval of the ventilation device. In the table above, exercise codes 1 and 2 have the highest proportion of fruits and vegetables with high breathing intensity, so the ventilation interval is relatively short. Exercise codes 3 and 4 have the highest proportion of fruits and vegetables with medium breathing intensity, so the ventilation interval should be appropriately extended. Exercise codes 5 and 6 have the highest proportion of fruits and vegetables with low breathing intensity, so the ventilation interval should be further extended.

[0083] This design allows for customized ventilation strategies based on the characteristics of fruits and vegetables (such as respiration intensity), connecting the interior and exterior environments of the drawer, effectively promoting gas circulation, introducing fresh air while expelling harmful gases such as carbon dioxide from the drawer, and significantly improving the preservation quality of fruits and vegetables.

[0084] It should be noted that the preset parameters and setting parameters involved in this article can be designed according to the usage requirements. For example, the preset concentration range C0 can be 12% to 14%, the preset temperature range T0 can be 2℃ to 5℃, and the set ventilation time can be 10min to 15min. This invention does not impose any special restrictions on the specific values.

[0085] like Figure 8 As shown, for ease of understanding, the working process of the food preservation drawer will be described in detail below using an application example of the present invention.

[0086] Users place fruits and vegetables into the refrigerated drawer, and then the ventilation and temperature adjustment steps are performed simultaneously.

[0087] Ventilation adjustment steps:

[0088] Camera component 7 captures images of fruits and vegetables and transmits them to the controller;

[0089] The controller commands vacuum pump 5 to operate and evacuate drawer 2;

[0090] An oxygen sensor detects the oxygen concentration C inside drawer 2;

[0091] If the oxygen concentration C in drawer 2 reaches the preset concentration range C0;

[0092] The controller then instructs vacuum pump 5 to stop working;

[0093] The controller analyzes and identifies the images captured by the camera component 7, analyzes the total fruit and vegetable type parameters and the lower layer fruit and vegetable type parameters, and controls the ventilation device 3 and the conveyor belt 9 respectively based on the total fruit and vegetable type parameters and the lower layer fruit and vegetable type parameters.

[0094] Temperature adjustment steps:

[0095] The controller commands the refrigeration system to cool down, causing drawer 2 to cool down;

[0096] The temperature sensor detects the temperature T inside drawer 2;

[0097] If the temperature T inside drawer 2 reaches the preset temperature range T0;

[0098] The controller then instructs the refrigeration system to stop cooling.

[0099] It should be noted that the terminology used above is for describing specific embodiments only and is not intended to limit the exemplary embodiments of the present invention. When the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. The order of execution of actions, steps, etc., in the apparatus and methods shown in the specification and drawings can be implemented in any order unless a specific order is expressly specified, and as long as the output of a previous process is not used in a subsequent process. Similar sequential terms used for ease of description do not imply that such an order must be followed.

[0100] Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0101] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. Food storage drawer, including: The device comprises an outer casing, a drawer disposed within the outer casing, and a ventilation device mounted on the outer casing, the ventilation device being used to connect the drawer to the external environment; characterized in that a conveyor belt is laid at the bottom inside the drawer, the top surface of the conveyor belt serves as a surface for placing fruits and vegetables, and the conveyor belt is connected to a power mechanism that drives its movement.

2. The food preservation drawer according to claim 1, characterized in that, Also includes: The controller and the camera assembly for photographing fruits and vegetables are included, wherein the power mechanism and the camera assembly are both electrically connected to the controller. The controller receives image signals from the camera assembly and controls the power mechanism to move the conveyor belt.

3. The food preservation drawer according to claim 2, characterized in that, The camera assembly includes an external camera located outside the drawer and an internal camera located inside the drawer. The external camera is used to capture images of the user storing or taking out fruits and vegetables, and the internal camera is used to capture images of the upper layer of fruits and vegetables inside the drawer. The controller receives the images captured by the external camera and the internal camera, determines the type parameters of the lower layer of fruits and vegetables inside the drawer, and controls the power mechanism according to the type parameters of the lower layer of fruits and vegetables.

4. The food preservation drawer according to claim 2, characterized in that, The ventilation device is electrically connected to the controller. The controller receives images captured by the camera assembly, determines the total number of fruit and vegetable types in the drawer, and controls the ventilation device based on the total number of fruit and vegetable types.

5. The food preservation drawer according to claim 1, characterized in that, Also includes: A vacuum pump for extracting air from the drawer and an oxygen sensor for detecting the oxygen concentration C inside the drawer are provided. The controller of the food storage drawer receives the detection signal from the oxygen sensor and controls the vacuum pump.

6. The food preservation drawer according to claim 1, characterized in that, Also includes: A refrigeration system for supplying cooling to the drawer, and a temperature sensor for detecting the temperature T inside the drawer, wherein the controller of the refrigeration drawer receives the detection signal from the temperature sensor and controls the refrigeration system.

7. The food preservation drawer according to claim 1, characterized in that, The power mechanism includes: a rotating shaft mounted on the conveyor belt, a driven gear coaxially fixed with the rotating shaft, a driving gear meshing with the driven gear, and a motor that moves the driving gear. When the motor is turned on, it drives the conveyor belt to move.

8. A refrigerator, including: A cold storage compartment, characterized in that the cold storage compartment is provided with a food preservation drawer as described in any one of claims 1 to 7.

9. A preservation method, wherein the preservation method is applied to the preservation drawer according to any one of claims 1 to 7, characterized in that, include: Establish a preliminary correlation between the parameters of the types of fruits and vegetables in the lower layer and the start time of the movement; Collect parameters of the types of fruits and vegetables in the lower layer of the drawer; The corresponding movement start time is obtained from the first control relationship based on the lower layer fruit and vegetable type parameters; The power mechanism is activated at the start time of the movement and deactivated when the set movement time is reached.

10. The preservation method according to claim 9, characterized in that, Also includes: A second control relationship between total fruit and vegetable species parameters and ventilation interval time was established in advance; Collect the total number of fruit and vegetable types in the drawer; The corresponding ventilation interval time is obtained from the second control relationship based on the total fruit and vegetable species parameters. The ventilation device is turned on according to the specified ventilation interval and turned off when the set ventilation time is reached.

Images