Fresh-keeping lunch box

Abstract

The utility model relates to a kind of fresh-keeping lunch boxes, including box body and cover, and the inside of box body is equipped with inner support, and inner support is placed with inner bag, and the position of the inside of box body below inner support is equipped with battery, and installation slot is opened on inner support, and PTC heating plate is embedded in installation slot, and digital display screen is installed in the front side of box body, and the position of the left and right sides of digital display screen in the front side of box body is equipped with button, and PCBA10 is installed in the position of the rear side of button, digital display screen in the inner wall of box body, the position of the rear side of inner wall in box body below inner support is equipped with compartment, and fork spoon box is slidably equipped with in the right side in compartment by clamping lock component.The utility model integrates cold storage and heating insulation function, user can switch freely according to season, food material and demand, without additional purchase of two sets of independent equipment of cold storage and heating, save cost and space;The utility model is built-in 4-grade intelligent temperature control system, supports low temperature, medium temperature, high temperature and long-acting insulation and multiple modes, meet the preservation and heating demand of different food materials.

Description

Technical Field

[0001] This utility model belongs to the field of lunch box technology, specifically relating to a food preservation lunch box. Background Technology

[0002] Currently, almost all commercially available "pre-cooled lunch boxes" adopt the passive cooling approach of "ice box (or ice pack) pre-cooling": before use, the ice box needs to be taken out and placed separately in a household refrigerator or freezer for 4-6 hours, and then put back into the lunch box, relying on phase change heat absorption to create a low-temperature microenvironment of 2-8℃ inside the box.

[0003] As the demand for "ready-to-eat" meals increases among urban dwellers with fast-paced lifestyles, ice box-style food preservation has revealed the following significant drawbacks, becoming a bottleneck for user experience: First, users must place the ice box in the refrigerator the night before or at least several hours in advance; if they forget to freeze it or decide to bring their own food at the last minute, the preservation function is completely ineffective; the ice box continuously absorbs heat, causing the internal temperature to remain consistently low. If users want to eat the food at 10 a.m. or 11 a.m., it will still be "cold." If they want to reheat it in a microwave, the ice box must be removed, creating a disconnect in the process and negating the purpose of "preservation"; furthermore, in winter, users prefer "keeping warm" rather than "refrigerating," but the ice box cannot provide heat, requiring the lunchbox to be equipped with a separate electric heating module, resulting in two independent systems coexisting, leading to structural redundancy and high costs. Utility Model Content

[0004] The purpose of this utility model is to provide a food preservation lunch box to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a food storage container, comprising a container body and a lid, wherein an inner tray is provided inside the container body, an inner liner is placed inside the inner tray, a battery is provided inside the container body located below the inner tray, an installation groove is formed on the inner tray, a PTC heating plate is embedded in the installation groove, a digital display screen is installed on the front side of the container body, buttons are provided on the left and right sides of the digital display screen on the front side of the container body, a PCBA is installed on the inner wall of the container body located behind the buttons and the digital display screen, a compartment is provided on the rear side of the container body located below the inner tray, and a fork and spoon box is slidably provided on the right side of the compartment via a locking assembly.

[0006] Preferably, the locking assembly includes: a locking block on the right side of the compartment and a locking block on the right side of the fork and spoon box.

[0007] Preferably, the left side of the cover is provided with a locking plate, the inner side of the locking plate is provided with a card plate, and the left and right sides of the box are provided with card slots.

[0008] Preferably, a bottom cover is fitted at the bottom of the cover body, a sealing strip is provided on the outside of the bottom cover, and the bottom cover and the cover body form a refrigeration compartment, and an ice box is provided in the refrigeration compartment.

[0009] Preferably, the top front side of the cover is recessed with a semi-groove, a handle is rotatably provided in the semi-groove, and a retrieval groove is recessed on the front side of the semi-groove.

[0010] Preferably, a charging port is provided on the left side of the inner tray, and a waterproof plug is provided inside the charging port.

[0011] Preferably, friction pads are symmetrically provided at the bottom of the box.

[0012] Preferably, the inner liner is made of 304 stainless steel.

[0013] Preferably, the button includes at least four function keys, which are used to realize the functions of power switch, temperature increase, temperature decrease and mode switching.

[0014] Preferably, the PTC heating plate supports temperature adjustment at least 4 preset levels.

[0015] Compared with existing technologies, the advantages of this utility model are as follows: This utility model integrates refrigeration and preservation with heating and heat preservation functions, allowing users to switch freely according to season, ingredients, and needs without the need to purchase two separate sets of refrigeration and heating equipment, saving costs and space; This utility model has a built-in 4-level intelligent temperature control system, supporting low temperature, medium temperature, high temperature, and long-term heat preservation modes to meet the preservation and heating needs of different ingredients (such as baby food, soup, porridge, leftovers, etc.), avoiding excessively high or low temperatures from affecting the taste and nutrition of the food; The lunchbox of this utility model is equipped with a digital display screen and buttons, which intuitively displays the temperature, time, and working status, supports one-click mode switching and timer reservation, and supports remote control via mobile APP, allowing users to customize the temperature and duration, receive reminders when heating is complete, and is highly adaptable. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a cross-sectional view of the present invention;

[0018] Figure 3 This is an exploded view of the present invention;

[0019] Figure 4 This is an exploded view of the box body in this utility model;

[0020] Figure 5 This is an exploded view of the cover of this utility model.

[0021] Numbering in the diagram: 1-Box body, 2-Lid body, 3-Inner tray, 4-Inner liner, 5-Battery, 6-Mounting slot, 7-PTC heating plate, 8-Digital display screen, 9-Button, 10-PCBA, 11-Compartment, 12-Lock assembly, 121-Lock block, 122-Lock block, 13-Fork and spoon box, 14-Lock plate, 15-Lock plate, 16-Lock slot, 17-Bottom cover, 18-Sealing strip, 19-Refrigeration compartment, 20-Ice box, 21-Half compartment, 22-Handle, 23-Retrieval slot, 24-Charging port, 25-Waterproof plug, 26-Friction pad. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] like Figures 1 to 5 The food storage container shown includes a container body 1 and a lid 2. The container body 1 has an inner tray 3, inside which an inner liner 4 is placed. A battery 5 is located below the inner tray 3 inside the container body 1. An installation slot 6 is formed on the inner tray 3, and a PTC heating plate 7 is embedded in the installation slot 6. A digital display screen 8 is mounted on the front of the container body 1. Buttons 9 are located on the left and right sides of the digital display screen 8 on the front of the container body 1. A PCBA 10 is installed on the inner wall of the container body 1 behind the buttons 9 and the digital display screen 8. A compartment 11 is located on the rear side of the container body 1 below the inner tray 3. A fork and spoon holder 13 is slidably mounted on the right side of the compartment 11 via a locking assembly 12. A locking plate 14 is rotatably mounted on the left side of the lid 2. A locking plate 15 is located inside the locking plate 14. Slots 16 are located on the left and right sides of the container body 1. The bottom of the lid 2 is locked in place. The box is equipped with a bottom cover 17, with a sealing strip 18 on the outside of the bottom cover 17. The bottom cover 17 and the cover body 2 form a refrigeration compartment 19, and an ice box 20 is placed inside the refrigeration compartment 19. The locking assembly 12 includes: a locking block 121 on the right side of the compartment 11, and a locking block 122 on the right side of the fork and spoon box 13. A semi-groove 21 is recessed on the front side of the top of the cover body 2, with a handle 22 rotating inside the semi-groove 21, and a retrieval groove 23 recessed on the front side of the semi-groove 21. A charging port 24 is opened on the left side of the inner tray 3, and a waterproof plug 25 is placed inside the charging port 24. Friction pads 26 are symmetrically arranged on the bottom of the box body 1. The inner liner 4 is made of 304 stainless steel. The button 9 includes at least 4 function keys, which are used to realize the functions of power switch, temperature increase, temperature decrease and mode switching. The PTC heating plate 7 supports temperature adjustment at least 4 preset levels.

[0025] This utility model integrates refrigeration and heating / insulation functions into one unit, allowing users to switch freely according to the season, ingredients, and needs, eliminating the need to purchase two separate refrigeration and heating devices, thus saving costs and space. The utility model features a built-in 4-level intelligent temperature control system, supporting low, medium, high, and long-term insulation modes to meet the preservation and heating needs of different ingredients (such as baby food, soups, porridge, and leftovers), preventing excessively high or low temperatures from affecting the taste and nutrition of the food. The lunchbox is equipped with a digital display screen 8 and buttons 9, intuitively displaying temperature, time, and working status. It supports one-button mode switching and timer scheduling, and also supports remote control via a mobile app, allowing users to customize temperature and duration, receive heating completion reminders, and is highly adaptable.

[0026] Example 2

[0027] like Figures 1 to 5 The food storage container shown includes a container body 1 and a lid 2. The lid 2 has a locking plate 14 rotatably mounted on its left side, and a retaining plate 15 is located inside the locking plate 14. The retaining plate 15 is slightly shorter than the locking plate 14. The container body 1 has slots 16 on both sides, with the openings of the slots 16 facing downwards. This allows the user to engage the lid 2 with the container body 1, then rotate the locking plate 14 to engage the retaining plate 15 into the slots 16, thus completing the installation of the lid 2 and storing the food inside. Furthermore, the lid 2 has an upwardly protruding design, and a bottom cover 17 is attached to its bottom, meaning the bottom cover 17 can be detachably installed onto the lid. 2. The bottom of the lid 17 is positioned to maintain stability. A sealing strip 18 is provided on the outer side of the lid 17. After the user engages the lid 2 with the box 1, the sealing strip 18 seals the food stored in the box 1, preventing dust contamination. A refrigerator compartment 19 is located between the bottom lid 17 and the top of the lid 2. This compartment is used to place an ice pack 20. The user can remove the ice pack 20 beforehand, fill it with water, and freeze it in the freezer. Then, the ice pack 20 is placed in the refrigerator compartment 19, and the bottom lid 17 is installed at the bottom of the lid 2. This provides the lid 2 with a short-term refrigeration function. In practical application, the user engages the lid 2 with the ice pack 20 with the box 1 to seal and preserve the food stored inside.

[0028] The top front side of the lid 2 has a recessed semi-groove 21, and a handle 22 is rotatably provided in the semi-groove 21. After the handle 22 is rotated into the semi-groove 21, its surface curvature will be consistent with the rear side of the lid 2, which makes it easy to place the lunch box as a whole. The front side of the semi-groove 21 has a recessed retrieval groove 23, which forms a gap below the handle 22, allowing the user to easily rotate the handle 22 to lift the lunch box.

[0029] Furthermore, friction pads 26 are symmetrically provided at the bottom of the box body 1. The friction pads 26 are made of rubber with a high coefficient of friction to prevent the lunch box from being easily moved when placed.

[0030] Example 3

[0031] like Figures 1 to 5 The food storage container shown includes a container body 1 and a lid 2. The container body 1 has an inner tray 3, and an inner liner 4 is placed inside the inner tray 3. When the inner tray 3 has a heating function, the user can store food in the inner liner 4 and then place the inner liner 4 in the inner tray 3 to complete the storage. Heating the inner liner 4 can achieve both food preservation and heating. The inner liner 4 is made of 304 stainless steel, which facilitates the separate removal and cleaning of the inner liner 4 and allows for rapid heat conduction to heat the food. The inner tray 3 has an installation groove 6, in which a PTC heating plate 7 is embedded. When the inner liner 4 is placed in the inner tray 3, its bottom contacts the PTC heating plate 7 on the inner tray 3. The PTC heating plate 7 operates and generates heat, which is transferred to the inner liner 4 to heat the food.

[0032] To meet the preservation, heating, and heat preservation needs of different ingredients, this food storage container features a built-in 4-level intelligent temperature control system. It uses a PTC heating plate 7 for precise temperature control, combined with real-time feedback on a digital display screen 8, allowing users to switch to the most suitable temperature level with a single touch; including but not limited to:

[0033] The low-temperature heating setting (approximately 45℃) gently heats the food to near body temperature, preventing high temperatures from damaging nutrients. During this time, the PTC plate heats the food at a low frequency, ensuring even heating of the inner pot 4 without localized overheating. The screen displays the "BABY" icon at this time, and the temperature gradually rises to 45℃ before being kept constant. This setting is suitable for infant complementary foods, breast milk, cow's milk, and foods for people with sensitive stomachs.

[0034] The medium-temperature heating setting (approximately 65℃) quickly heats the food to a palatable temperature, killing common bacteria while preventing boiling and overflow. The bottom of the inner pot 4 is tightly fitted with the PTC plate, achieving a thermal efficiency of over 92%. At this time, the screen displays the "HEAT" icon, and the temperature dynamic bar shows the heating progress. A "beep" sound indicates completion. It is suitable for regular heating of soups, porridges, stews, and bento meals.

[0035] The high-temperature heating setting (approximately 85℃) continuously heats the food until it is close to boiling. This high temperature breaks down some of the oil, improving food safety. The screen will display a "HIGH" icon at this time. Once the temperature reaches 85℃, the setting will automatically switch to intermittent heating, maintaining high-temperature sterilization for 10 minutes. This setting is suitable for leftovers, greasy dishes (such as braised pork), and high-oil and high-salt foods that require high-temperature sterilization.

[0036] The long-lasting keep-warm setting (approximately 60℃) automatically switches or can be manually activated after heating is complete. Based on the excellent sealing of the inner pot and the stainless steel material, it keeps the food temperature stable. The screen displays the "KEEP" icon, and the temperature is kept constant at around 60℃ to prevent the food from cooling down. It is suitable for various meals that need to be kept warm for a long time, meeting the dining needs in office, business travel and other scenarios.

[0037] It should be noted that this utility model connects to a mobile APP via the Type-C interface on the side of the box 1, which allows users to customize the temperature and duration of each setting and receive "heating complete" push notifications. At the same time, the heating process can also be pre-timed via the mobile APP or button 9 for more timely use.

[0038] A digital display screen 8 is installed on the front of the box 1. The digital display screen 8 is used to display time, temperature, working status information, etc. Buttons 9 are located on the left and right sides of the digital display screen 8 on the front of the box 1. Buttons 9 include at least 4 function keys, which are used to realize the power switch, temperature increase, temperature decrease and mode switching functions respectively. The above function keys correspond to buttons 9 with different logos, so users can easily get started.

[0039] PCBA10, or printed circuit board assembly, is installed on the inner wall of the box 1 behind the buttons 9 and digital display screen 8. It integrates the main control chip, functional circuits and interface components, and is responsible for the acquisition, processing and display driving of the whole machine's signals. The battery 5 is located under the inner tray 3 inside the box 1, which provides a stable working power for the heating plate, display screen and other components. A standard charging port 24 is specially opened on the left side of the inner tray 3. The charging port 24 is surrounded by an elastic waterproof sealing plug, which effectively prevents moisture and dust from entering the interior from the charging port 24 without affecting the charging function, thereby improving the product's protection performance and safety in complex environments.

[0040] Example 4

[0041] like Figures 1 to 5 The food storage container shown features a one-touch pop-out design for a fork and spoon inside the container body 1. Specifically, a compartment 11 is located on the rear side of the container body 1, below the inner tray 3. A fork and spoon holder 13 is slidably mounted on the right side of the compartment 11 via a locking assembly 12. The locking assembly 12 is limited to any structure that can achieve pop-out and locking, such as a locking block 121 on the right side of the compartment 11 and a locking block 122 on the right side of the fork and spoon holder 13. The locking block 121 is a spring-loaded piece. When the fork and spoon box 13 is pushed into the compartment 11, it causes the locking block 122 to move to the right until it contacts the locking block 121. The locking block 121 is forced to move outward until the locking block 122 is locked into the limiting area of ​​the locking block 121, and the locking block 121 is reset. When it is necessary to take the fork and spoon, the fork and spoon box 13 is pushed inward to cause the locking block 121 to open outward and no longer lock the locking block 122. Then the force is stopped, the locking block 121 is reset and retracted, pushing the fork and spoon box 13 to move to the left out of the compartment 11.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A food storage container, comprising a container body and a lid, characterized in that, The box contains an inner tray, within which an inner liner is placed. A battery is located below the inner tray within the box. An installation slot is formed on the inner tray, into which a PTC heating plate is embedded. A digital display screen is mounted on the front of the box. Buttons are located on the left and right sides of the digital display screen on the front of the box. A PCBA is mounted on the inner wall of the box behind the buttons and the digital display screen. A compartment is located on the rear side of the box below the inner tray. A fork and spoon holder is slidably mounted on the right side of the compartment via a locking assembly.

2. The food storage container according to claim 1, characterized in that, The locking assembly includes: a locking block on the right side of the compartment and a locking block on the right side of the fork and spoon box.

3. A food storage container according to claim 1, characterized in that, The left side of the cover is provided with a locking plate, the inner side of the locking plate is provided with a card plate, and the left and right sides of the box are provided with card slots.

4. A food storage container according to claim 3, characterized in that, The bottom of the cover is fitted with a bottom cover, and a sealing strip is provided on the outside of the bottom cover. The bottom cover and the body of the cover form a refrigeration compartment, and an ice box is provided in the refrigeration compartment.

5. A food storage container according to claim 4, characterized in that, The top front side of the cover is recessed with a semi-groove, a handle is rotatably provided in the semi-groove, and a retrieval groove is recessed on the front side of the semi-groove.

6. A food storage container according to claim 1, characterized in that, The inner tray has a charging port on the left side, and the charging port is equipped with a waterproof plug.

7. A food storage container according to claim 1, characterized in that, The bottom of the box is symmetrically equipped with friction pads.

8. A food storage container according to claim 1, characterized in that, The inner liner is made of 304 stainless steel.

9. A food storage container according to claim 1, characterized in that, The button includes at least four function keys, which are used to realize the functions of power switch, temperature increase, temperature decrease and mode switching.

10. A food storage container according to claim 1, characterized in that, The PTC heating plate supports temperature adjustment at least 4 preset levels.

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