Portable breast milk cooler

Abstract

A portable breast milk cooler includes: an outer cup, including an inner cup wall and an outer cup wall, where a gap between the inner cup wall and the outer cup wall forms a first vacuum structure, and a space enclosed by the inner cup wall forms a containment cavity; a cup lid, provided with a second vacuum structure; at least one independently sealed inner cup containing within the containment cavity; and a refrigeration body which at least surrounds an outer peripheral wall of the inner cup.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese Patent Application No. 202422595814.6, filed on Oct. 12, 2024, and Chinese Patent Application No. 202521837219.7, filed on Aug. 27, 2025. All of the aforementioned applications are incorporated herein by reference in their entireties.TECHNICAL FIELD

[0002] This application relates to the technical field of daily necessities, specifically to a portable breast milk cooler.BACKGROUND

[0003] In daily life, certain foods and medicines require refrigerated storage, such as breast milk and insulin, which need to be kept at a specific temperature. A refrigerator is a commonly used device for refrigerating items, but when people go out and must carry certain foods or medicines that require low-temperature storage, refrigerating these items becomes a challenging issue.

[0004] Currently, portable refrigeration cups have appeared on the market. These refrigeration cups mainly include an outer cup, an inner cup for storing food or medicine, and a cup lid, with a cold-retaining layer provided between the inner cup and the outer cup to keep the food or medicine in the inner cup at a low temperature, preventing spoilage or loss of efficacy.

[0005] For example, Chinese Patent Publication CN220229617U disclosed a portable refrigeration cup capable of reducing temperature variations within a refrigeration cavity. The refrigeration cup in this solution includes a cylindrical refrigeration cup body, within which a cylindrical refrigeration cavity coaxial with the refrigeration cup body is provided. The height of the refrigeration cavity is greater than the length of any line segment on the horizontal cross-section of the refrigeration cavity. An insulation layer is closely attached to an outer side wall of the refrigeration cup body, and a refrigeration apparatus is provided to absorb heat from the refrigeration cavity and transfer the heat to the outside of the refrigeration cup body. The refrigeration apparatus is electrically driven, and the cup body is further provided with a control panel, a cooling fan, a display window, and other structures.

[0006] In another example, a refrigeration cup disclosed in Chinese Patent Publication CN206187688U includes an outer cup body, an inner liner, and a cup lid, where a sealed cavity is formed between the outer cup body and the inner liner to hold a chemical material package and a chemical adsorption package. The chemical material package contains substances capable of refrigeration through a chemical endothermic reaction. When the substances in the chemical material package undergo a chemical reaction, a large amount of heat is absorbed, thereby refrigerating the food or medicine inside the inner liner. This refrigeration cup has a simple structure and does not require electricity.

[0007] Although the above or structurally similar refrigeration cups achieve portability and improve user convenience, their cold-retaining effects vary, and sustained refrigeration performance cannot be guaranteed, affecting the user experience.SUMMARY

[0008] A purpose of this application is to improve the refrigeration efficiency of a refrigeration cup and prolong the refrigeration preservation time of food or medicine within the cup.

[0009] To achieve the above purpose, this application provides a portable breast milk cooler, including:

[0010] an outer cup, including an inner cup wall and an outer cup wall sleeving the inner cup wall, where a gap between the inner cup wall and the outer cup wall forms a first vacuum structure, and a space enclosed by the inner cup wall forms a containment cavity;

[0011] a cup lid, provided with a second vacuum structure, where the cup lid is configured to seal the containment cavity;

[0012] at least one independently sealed inner cup, configured to contain a substance to be refrigerated, where the inner cup is contained within the containment cavity; and

[0013] a refrigeration body, filled with an agent for retaining cold, where the refrigeration body is disposed in a gap between the inner cup wall and the inner cup and at least surrounds an outer peripheral wall of the inner cup, and the refrigeration body is recyclable.

[0014] Preferably, the cup lid includes a connection portion configured to be connected to a cup mouth of the outer cup and a sealed cavity, where a lower part of the sealed cavity is provided with a second sealing member configured to be sealingly connected to the inner cup wall.

[0015] More preferably, the inner cup wall forms an inclined surface tilted towards the center of the portable breast milk cooler, the second sealing member has a same inclination angle as the inclined surface, and the second sealing member achieves sealing at the inclined surface through compression and deformation; or

[0016] the inner cup wall does not form the inclined surface, a lower part of the sealed cavity is provided along a circumference thereof with a plurality of second sealing members in a form of annular protrusions, and the second sealing members achieve sealing at the inner cup wall through compression and deformation.

[0017] Preferably, the refrigeration body includes a plurality of annular structures open at both ends, the annular structures sleeve an outer part of the inner cup, and the annular structures are connected by stacking.

[0018] More preferably, the annular structure has one end provided with a protrusion and the other end provided with a notch, and when adjacent two of the annular structures are stacked, the protrusion of one annular structure is limited within the notch of the other annular structure.

[0019] Preferably, the refrigeration body includes a plurality of chamber bodies open at one end, and an opening of one chamber body is detachably connected to an opening of another corresponding chamber body; and

[0020] after corresponding adjacent two of the chamber bodies are connected to form a containment space, the containment space is used for containing one such inner cup.

[0021] More preferably, half of the chamber bodies are each circumferentially provided with a plurality of engagement blocks at an outer wall of the opening;

[0022] the other half of the chamber bodies are each circumferentially provided with openings allowing the engagement blocks to slide therein at an inner wall of the opening; and

[0023] the openings connect limiting portions in communication therewith, and after the engagement blocks slide into the openings, rotating one of the chamber bodies causes the engagement blocks to slide into the limiting portions.

[0024] Preferably, the refrigeration body is provided, along an axial direction on an outer wall, with a first airflow channel for enlarging the gap with the inner cup wall; and / or

[0025] the opening of the chamber body is provided with a second airflow channel communicating with an interior of the containment space.

[0026] Preferably, the sealed cavity is provided with a vacuum pumping assembly, a power supply module, a control module, a display window, and a temperature sensing module therein; where

[0027] the vacuum pumping assembly is configured to form a vacuum environment inside the portable breast milk cooler;

[0028] the power supply module is configured to supply power to all electrical devices within the cup lid, and the temperature sensing module is configured to detect a temperature of the containment cavity; and

[0029] the control module is connected to all the vacuum pumping assembly, the display window, and the temperature sensing module, and the display window at least displays the temperature and a vacuum degree of the containment cavity.

[0030] More preferably, the second vacuum structure includes a first vacuum region and a second vacuum region, and the first vacuum region surrounds a circumferential wall of the cup lid; and

[0031] the second vacuum region is configured such that after the containment cavity is sealed by the cup lid, the second vacuum region is located directly above a top of the containment cavity.

[0032] The technical solution claimed by this application primarily achieves the following beneficial effects.

[0033] In the portable breast milk cooler structure of this application, an inner cup for storing a substance to be refrigerated can be entirely surrounded by a refrigeration body. When the inner cup is placed in a containment cavity of an outer cup, a vacuum layer of the outer cup provides further thermal insulation to a peripheral wall and a bottom of the inner cup. When a cup lid is closed, a hollow structure in the cup lid further provides thermal insulation to a top of the inner cup. Thus, the inner cup is simultaneously subjected to triple cold-retaining and thermal-insulating effects from the refrigeration body, a vacuum layer of the outer cup, and a vacuum layer of the cup lid, improving the refrigeration efficiency for the substance contained therein and prolonging the refrigeration preservation time.

[0034] A connection portion and a second sealing member on the cup lid simultaneously seal a space within the containment cavity, further isolating heat exchange between the interior and exterior of the portable breast milk cooler, thus improving the cold-retaining and thermal-insulating effects.

[0035] A vacuum assembly in the cup lid can form a vacuum in a containment cavity of the outer cup and a containment space formed by the refrigeration body after the inner cup, the refrigeration body, and the outer cup are assembled, isolating external heat from entering the cup, enhancing the cold-retaining and thermal-insulating effects, improving the refrigeration efficiency of the substance in the inner cup, and prolonging its storage time.BRIEF DESCRIPTION OF THE DRAWINGS

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the following briefly describes the drawings required for the description of the embodiments. Obviously, the drawings described below are merely embodiments of this application, and those of ordinary skill in the art can obtain other drawings based on the provided drawings without creative effort.

[0037] FIG. 1 is a schematic diagram of a three-dimensional structure of a portable breast milk cooler.

[0038] FIG. 2 is a cross-sectional view of the portable breast milk cooler when a refrigeration body is an annular structure.

[0039] FIG. 3 is a schematic diagram of the annular structure.

[0040] FIG. 4 is a cross-sectional view of the portable breast milk cooler when the refrigeration body is configured as a chamber body.

[0041] FIG. 5 is a schematic structural diagram where two chamber bodies are connected at their openings to accommodate an inner cup internally.

[0042] FIG. 6 is a cross-sectional view of FIG. 5.

[0043] FIG. 7 is a schematic structural diagram of an individual chamber body.

[0044] FIG. 8 is a schematic structural diagram of another chamber body that engages with the chamber body in FIG. 7.

[0045] FIG. 9 is a schematic diagram of an internal structure of a cup lid.

[0046] FIG. 10 is a schematic diagram of a sealing structure between the cup lid and an outer cup.

[0047] FIG. 11 is an enlarged schematic diagram of the sealing structure between the cup lid and the outer cup.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0048] To make the objectives, technical solutions, and beneficial effects of the embodiments in this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below with reference to the drawings in the embodiments of this application. Obviously, the described embodiments are some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort fall within the scope of protection of this application.Embodiment 1

[0049] This embodiment provides a portable breast milk cooler, as shown in FIGS. 1-9, mainly including an outer cup 1, an inner cup 6, and a cup lid 5, where the inner cup 6 is configured to store food or medicine requiring low-temperature preservation, such as breast milk.

[0050] The outer cup 1 includes an inner cup wall 2 and an outer cup wall 3 sleeving the inner cup wall 2, where a gap between the inner cup wall 2 and the outer cup wall 3 is configured as a first vacuum structure, and a space enclosed by the inner cup wall 2 forms a containment cavity 4. The cup lid 5 is provided with a second vacuum structure, and the cup lid 5 is configured to seal the containment cavity 4.

[0051] The portable breast milk cooler in this embodiment is provided with at least one independently sealed inner cup 6, where the inner cup 6 is contained within the containment cavity 4, with a peripheral wall and a bottom surrounded by the vacuum structure of the outer cup 1.

[0052] The portable breast milk cooler in this embodiment further includes a recyclable refrigeration body 7, and the refrigeration body 7 may exemplarily be configured as a double-layer structure, filled with an agent for retaining cold, such as a soluble polymer with main components of low-degree polymerized sodium polyacrylate, polyvinyl alcohol, or polyacrylamide. Additionally, partitions or grids may be provided inside the refrigeration body to make the distribution of the cold-retaining agent more uniform while enhancing the mechanical strength of the refrigeration body. The refrigeration body 7 is disposed in a gap between the inner cup wall 2 and the inner cup 6 and at least surrounds an outer peripheral wall of the inner cup 6. The refrigeration body 7 is in clearance fit with the inner cup wall 2, and the inner cup 6 is also in clearance fit with the refrigeration body 7. Both the refrigeration body 7 and the inner cup 6 can be removed from the containment cavity 4.

[0053] In the portable breast milk cooler structure of this embodiment, the inner cup 6 for storing a substance to be refrigerated can be surrounded by the refrigeration body 7. When the inner cup 6 is placed in the containment cavity 4 of the outer cup 1, a vacuum layer of the outer cup 1 provides further thermal insulation to a peripheral wall and a bottom of the inner cup 6. When the cup lid 5 is closed, a hollow structure in the cup lid 5 further provides thermal insulation to a top of the inner cup 6. Thus, the inner cup 6 is simultaneously subjected to triple cold-retaining and thermal-insulating effects from the refrigeration body 7, the vacuum layer of the outer cup 1, and a vacuum layer of the cup lid 5, improving the refrigeration efficiency for the substance contained therein and prolonging the refrigeration preservation time.

[0054] In a preferred solution, as shown in FIG. 9, the cup lid 5 is provided with a vacuum pumping assembly for forming a vacuum environment inside the portable breast milk cooler, a power supply module 10, a control module 11, a display window 12, and a temperature sensing module 13. Exemplarily, the vacuum pumping assembly includes a vacuum pump 8 and a vacuum control valve 9 connected to the vacuum pump 8. The vacuum control valve 9 may be configured to connect to a button, allowing a user to control the activation or release of the vacuum pump 8 by pressing the button. After the cup lid 5 is closed, the vacuum pump 8 communicates with the containment cavity 4 to extract air from the containment cavity 4, forming a vacuum environment within the containment cavity 4, isolating external heat from entering the cup, and enhancing the thermal insulation effect. Additionally, an independent one-way valve may be provided, and the one-way valve is controlled to achieve communication between the containment cavity 4 and the outside, thereby releasing the vacuum in the containment cavity 4.

[0055] The power supply module 10 (for example, a rechargeable battery) is configured to supply power to all electrical devices within the cup lid 5, and the temperature sensing module 13 (for example, a temperature probe) is configured to detect a temperature of the containment cavity 4. The control module 11 (for example, a PCB control board) is connected to all the vacuum pumping assembly, the display window 12 (a display screen), and the temperature sensing module 13, and the display window 12 at least displays the temperature and a vacuum degree of the containment cavity 4, facilitating observation of the user. In this embodiment, the temperature sensing module 13, the control module 11, the vacuum pumping assembly, and the like are accommodated in an internal space of the cup lid 5 through compression fixing. Alternatively, in another exemplary structure, the vacuum pump 8 may not be provided inside the cup lid 5, and the portable breast milk cooler may form a vacuum environment inside through connection between the vacuum control valve 9 and an external vacuum pumping device.

[0056] In an exemplary structure, referring to FIG. 4, the second vacuum structure in the cup lid 5 includes a first vacuum region 14 and a second vacuum region 15, where the first vacuum region 14 surrounds a circumferential wall of the cup lid 5 and is disposed above a joint where the cup lid 5 is sealingly connected to the outer cup 1. The second vacuum region 15 is configured such that after the containment cavity 4 is sealed by the cup lid 5, the second vacuum region 15 is located directly above a top of the containment cavity 4. The second vacuum region 15 is positioned lower than the first vacuum region 14, and an area of the second vacuum region 15 is set to be as large as possible to reduce a gap between the vacuum region and a vacuum layer of the cup body, preventing external heat from entering the cup. Preferably, a bottom of the cup lid 5 may be provided with a first sealing member 16 for further sealing the second vacuum region inside the cup lid 5, and a filter sheet is provided below the second vacuum region 15. The filter sheet is used to filter air in the containment cavity during the vacuum pumping process to minimize the intake of dust and other impurities inside the cup body into the vacuum pump, and a dual vacuum structure in the cup lid 5 further enhances the thermal insulation effect.

[0057] In this embodiment, the vacuum assembly in the cup lid 5 can form a vacuum in the containment cavity 4 of the outer cup 1 and a containment space 21 formed by the refrigeration body 7 after the inner cup 6, the refrigeration body 7, and the outer cup 1 are assembled, enhancing the cold-retaining and thermal-insulating effects, improving the refrigeration efficiency of the substance in the inner cup, and prolonging its storage time.

[0058] In an exemplary structure, the cup lid 5 is connected to the outer cup 1 through threading; alternatively, an elastic sealing structure (for example, a silicone ring, not shown in the figure) may be provided circumferentially at a lower part of the cup lid 5, with a diameter of the sealing structure being greater than an inner diameter of a cup mouth of the outer cup 1. The sealing structure achieves sealing of the containment cavity 4 through compression and deformation at an inner wall of the cup mouth of the outer cup 1 after entering the cup mouth of the outer cup 1.

[0059] In a preferred structure, a vacuum region 27 is formed at a joint between the inner cup wall 2 and the outer cup wall 3 of the outer cup 1 at the cup mouth, and the vacuum region 27 is in communication with the first vacuum structure. Exemplarily, the cup lid 5 includes a connection portion 28 for threaded connection or sealing connection through compression with the outer cup 1 and a sealed cavity 29 for accommodating the vacuum assembly, the power supply module 10, the control module 11, the temperature sensing module 13, and other components.

[0060] In another more preferred structure, a sealing connection is also formed between the cup lid 5 and the inner cup wall 2. Exemplarily, as shown in FIGS. 10 and 11, the inner cup wall 2 forms an inclined surface 30 tilted toward a center of the portable breast milk cooler below the vacuum region 27, a lower part of the sealed cavity 29 is provided with a second sealing member 31 sealingly connected to the inclined surface 30, the second sealing member 31 has an inclination angle corresponding to the inclined surface 30, and the second sealing member 31 achieves sealing at the inclined surface 30 through compression and deformation. A conical sealing structure between the inner cup wall 2 and the cup lid 5 facilitates the opening of the cup lid 5 while sealing the containment cavity 4.

[0061] In another exemplary structure, the inner cup wall 2 does not form an inclined surface, a lower part of the sealed cavity 29 of the cup lid 5 is provided circumferentially with a plurality of second sealing members 31 in a form of annular protrusions, and in this structure, the second sealing members 31 achieve an engagement sealing at the inner cup wall 2 through compression and deformation to seal the containment cavity 4. Certainly, a conical sealing connection structure and an engagement sealing connection structure may be used in combination, for example, by providing the engagement sealing structure below the conical sealing structure.

[0062] In this embodiment, the second sealing member 31 may be made of an elastic material, such as silicone. The connection portion 28 and the second sealing member 31 on the cup lid 5 simultaneously seal a space within the containment cavity 4, further isolating heat exchange between the interior and exterior of the portable breast milk cooler, thus improving the cold-retaining and thermal-insulating effects.

[0063] In an exemplary structure, as shown in FIGS. 2 and 3, the refrigeration body 7 includes a plurality of annular structures 17 open at both ends, the annular structures 17 sleeve an outer part of the inner cup 6, and the annular structures 17 are connected by stacking. For example, one end of the annular structure 17 may be provided with a protrusion 18, and the other end may be provided with a notch 19. When two adjacent annular structures 17 are stacked, the protrusion 18 of one annular structure 17 is limited within the notch 19 of the other annular structure 17.

[0064] The usage process of the portable breast milk cooler in this embodiment is as follows:

[0065] When a substance needs to be refrigerated, the substance is placed into the inner cup 6, and the inner cup 6 is sealed. The sealed inner cup 6 is then placed into the containment cavity 4 of the outer cup 1.

[0066] The inner cup 6 is sleeved with annular structures 17 pre-treated with low-temperature refrigeration (for example, pre-refrigerated in a refrigerator) until the annular structures 17 are stacked to completely surround a peripheral wall of the inner cup 6, and a cold-retaining agent in the annular structures 17 is used to keep the substance to be refrigerated at a low temperature.

[0067] The outer cup 1 is sealed with the cup lid 5. After the cup lid 5 is tightly fixed, the vacuum pump 8 is activated to extract air from the containment cavity 4 and the refrigeration body 7, forming a vacuum environment inside the portable breast milk cooler.Embodiment 2

[0068] This embodiment provides a portable breast milk cooler, as shown in FIGS. 1-9, mainly including an outer cup 1, an inner cup 6, and a cup lid 5, where the inner cup 6 is configured to store food or medicine requiring low-temperature preservation, such as breast milk.

[0069] The outer cup 1 includes an inner cup wall 2 and an outer cup wall 3 sleeving the inner cup wall 2, where a gap between the inner cup wall 2 and the outer cup wall 3 is configured as a first vacuum structure, and a space enclosed by the inner cup wall 2 forms a containment cavity 4. The cup lid 5 is provided with a second vacuum structure, and the cup lid 5 is configured to seal the containment cavity 4.

[0070] The portable breast milk cooler in this embodiment is provided with at least one independently sealed inner cup 6 therein, where the inner cup 6 is contained within the containment cavity 4, with a peripheral wall and a bottom surrounded by the vacuum structure of the outer cup 1.

[0071] The portable breast milk cooler in this embodiment further includes a recyclable refrigeration body 7, and the refrigeration body 7 may exemplarily be configured as a double-layer structure, filled with an agent for retaining cold, such as a soluble polymer with main components of low-degree polymerized sodium polyacrylate, polyvinyl alcohol, or polyacrylamide. Additionally, partitions or grids may be provided inside the refrigeration body to make the distribution of the cold-retaining agent more uniform while enhancing the mechanical strength of the refrigeration body. The refrigeration body 7 is disposed in a gap between the inner cup wall 2 and the inner cup 6 and at least surrounds an outer peripheral wall of the inner cup 6. The refrigeration body 7 is in clearance fit with the inner cup wall 2, and the inner cup 6 is also in clearance fit with the refrigeration body 7. Both the refrigeration body 7 and the inner cup 6 can be removed from the containment cavity 4.

[0072] In the portable breast milk cooler structure of this embodiment, the inner cup 6 for storing a substance to be refrigerated can be surrounded by the refrigeration body 7. When the inner cup 6 is placed in the containment cavity 4 of the outer cup 1, a vacuum layer of the outer cup 1 provides further thermal insulation to a peripheral wall and a bottom of the inner cup 6. When the cup lid 5 is closed, a hollow structure in the cup lid 5 further provides thermal insulation to a top of the inner cup 6. Thus, the inner cup 6 is simultaneously subjected to triple cold-retaining and thermal-insulating effects from the refrigeration body 7, the vacuum layer of the outer cup 1, and a vacuum layer of the cup lid 5, improving the refrigeration efficiency for the substance contained therein and prolonging the refrigeration preservation time.

[0073] In a preferred solution, as shown in FIG. 9, the cup lid 5 is provided with a vacuum pumping assembly for forming a vacuum environment inside the portable breast milk cooler, a power supply module 10, a control module 11, a display window 12, and a temperature sensing module 13. Exemplarily, the vacuum pumping assembly includes a vacuum pump 8 and a vacuum control valve 9 connected to the vacuum pump 8. The vacuum control valve 9 may be configured to connect to a button, allowing a user to control the activation or release of the vacuum pump 8 by pressing the button. After the cup lid 5 is closed, the vacuum pump 8 communicates with the containment cavity 4 to extract air from the containment cavity 4, forming a vacuum environment within the containment cavity 4, and enhancing the thermal insulation effect. Additionally, an independent one-way valve may be provided, and the one-way valve is controlled to achieve communication between the containment cavity 4 and the outside, thereby releasing the vacuum in the containment cavity 4.

[0074] The power supply module 10 (for example, a rechargeable battery) is configured to supply power to all electrical devices within the cup lid 5, and the temperature sensing module 13 (for example, a temperature probe) is configured to detect a temperature of the containment cavity 4. The control module 11 (for example, a PCB control board) is connected to all the vacuum pumping assembly, the display window 12, and the temperature sensing module 13, and the display window 12 at least displays the temperature and a vacuum degree of the containment cavity 4, facilitating observation of the user. In this embodiment, the temperature sensing module 13, the control module 11, the vacuum pumping assembly, and the like are accommodated in an internal space of the cup lid 5 through compression fixing. Alternatively, in another exemplary structure, the vacuum pump 8 may not be provided inside the cup lid 5, and the portable breast milk cooler may form a vacuum environment inside through connection between the vacuum control valve 9 and an external vacuum pumping device.

[0075] In an exemplary structure, referring to FIG. 4, the second vacuum structure in the cup lid 5 includes a first vacuum region 14 and a second vacuum region 15, where the first vacuum region 14 surrounds a circumferential wall of the cup lid 5 and is disposed above a joint where the cup lid 5 is sealingly connected to the outer cup 1. The second vacuum region 15 is configured such that after the containment cavity 4 is sealed by the cup lid 5, the second vacuum region 15 is located directly above a top of the containment cavity 4. The second vacuum region 15 is positioned lower than the first vacuum region 14, and an area of the second vacuum region 15 is set to be as large as possible to reduce a gap between the vacuum region and a vacuum layer of the cup body, preventing external heat from entering the cup. Preferably, a bottom of the cup lid 5 may be provided with a first sealing member 16 for further sealing the second vacuum region inside the cup lid 5, and a filter sheet is provided below the second vacuum region 15. The filter sheet is used to filter air in the containment cavity during the vacuum pumping process to minimize the intake of dust and other impurities inside the cup body into the vacuum pump, and a dual vacuum structure in the cup lid 5 further enhances the thermal insulation effect.

[0076] In this embodiment, the vacuum assembly in the cup lid 5 can form a vacuum in the containment cavity 4 of the outer cup 1 and a containment space 21 formed by the refrigeration body 7 after the inner cup 6, the refrigeration body 7, and the outer cup 1 are assembled, isolating external heat from entering the cup, enhancing the cold-retaining and thermal-insulating effects, improving the refrigeration efficiency of the substance in the inner cup, and prolonging its storage time.

[0077] In an exemplary structure, the cup lid 5 is connected to the outer cup 1 through threading; alternatively, an elastic sealing structure (for example, a silicone ring, not shown in the figure) may be provided circumferentially at a lower part of the cup lid 5, with a diameter of the sealing structure being greater than an inner diameter of a cup mouth of the outer cup 1. The sealing structure achieves sealing of the containment cavity 4 through compression and deformation at an inner wall of the cup mouth of the outer cup 1 after entering the cup mouth of the outer cup 1.

[0078] In a preferred structure, a vacuum region 27 is formed at a joint between the inner cup wall 2 and the outer cup wall 3 of the outer cup 1 at the cup mouth, and the vacuum region 27 is in communication with the first vacuum structure. Exemplarily, the cup lid 5 includes a connection portion 28 for threaded connection or sealing connection through compression with the outer cup 1 and a sealed cavity 29 for accommodating the vacuum assembly, the power supply module 10, the control module 11, the temperature sensing module 13, and other components.

[0079] In another more preferred structure, a sealing connection is also formed between the cup lid 5 and the inner cup wall 2. Exemplarily, as shown in FIGS. 10 and 11, the inner cup wall 2 forms an inclined surface 30 tilted toward a center of the portable breast milk cooler below the vacuum region 27, a lower part of the sealed cavity 29 is provided with a second sealing member 31 sealingly connected to the inclined surface 30, the second sealing member 31 has an inclination angle corresponding to the inclined surface 30, and the second sealing member 31 achieves sealing at the inclined surface 30 through compression and deformation. A conical sealing structure between the inner cup wall 2 and the cup lid 5 facilitates the opening of the cup lid 5 while sealing the containment cavity 4.

[0080] In another exemplary structure, the inner cup wall 2 does not form an inclined surface, a lower part of the sealed cavity 29 of the cup lid 5 is provided circumferentially with a plurality of second sealing members 31 in a form of annular protrusions, and in this structure, the second sealing members 31 achieve an engagement sealing at the inner cup wall 2 through compression and deformation to seal the containment cavity 4. Certainly, a conical sealing connection structure and an engagement sealing connection structure may be used in combination, for example, by providing the engagement sealing structure below the conical sealing structure.

[0081] In this embodiment, the second sealing member 31 may be made of an elastic material, such as silicone. The connection portion 28 and the second sealing member 31 on the cup lid 5 simultaneously seal a space within the containment cavity 4, further isolating heat exchange between the interior and exterior of the portable breast milk cooler, thus improving the cold-retaining and thermal-insulating effects. In a preferred solution, as shown in FIGS. 4-8, the refrigeration body 7 includes a plurality of chamber bodies 20 open at one end, and an opening of one chamber body 20 is detachably connected to an opening of another chamber body 20. After two chamber bodies 20 are connected to form a containment space 21, and each containment space 21 is used for accommodating one inner cup 6. The inner cup 6 is in clearance connection to an inner wall of the chamber body 20, and a side wall, a top, and a bottom of the inner cup 6 are all surrounded by the refrigeration body.

[0082] In an exemplary structure, half of the chamber bodies 20 are each circumferentially provided with a plurality of engagement blocks 22 at an outer wall of the opening; and the other half of the chamber bodies 20 are each circumferentially provided with openings 23 allowing the engagement blocks 22 to slide therein at an inner wall of the opening. The openings 23 connect limiting portions 24 in communication therewith, and after the engagement blocks 22 slide into the openings 23, rotating one of the chamber bodies 20 causes the engagement blocks 22 to slide into the limiting portions 24, achieving fixation between the two chamber bodies 20.

[0083] Since both the refrigeration body 7 and the inner cup wall 2, as well as the inner cup 6 and the refrigeration body 7, are in clearance connection, to enable the vacuum pumping assembly to smoothly extract air from the containment cavity 4 during operation, a first airflow channel 25 is provided along an axial direction on an outer wall of the refrigeration body 7 to enlarge a gap with the inner cup wall 2. In an exemplary structure, several concave surfaces / grooves may be provided in an outer wall of the chamber body to serve as the first airflow channel 25. Furthermore, a second airflow channel 26 communicating with an interior of the containment space 21 may be provided at the opening of the chamber body 20, allowing air therein to be smoothly extracted, thus forming a vacuum environment. Any structure that can communicate with an interior of the containment space 21 at the opening joint after the two chamber bodies 20 are connected can serve as the second airflow channel 26, which is not further elaborated here.

[0084] The usage process of the portable breast milk cooler in this embodiment is as follows:

[0085] When a substance needs to be refrigerated, the substance is placed into the inner cup 6, and the inner cup 6 is sealed.

[0086] The sealed inner cup 6 is placed into a chamber body 20 pre-treated with low-temperature refrigeration (for example, pre-refrigerated in a refrigerator), and then covered with another chamber body similarly pre-treated with low-temperature refrigeration, and rotating one of the chamber bodies causes the engagement blocks of this chamber body to slide into the limiting portions of the other chamber body, achieving a fixed connection of the two chamber bodies at the openings.

[0087] The inner cup, entirely surrounded by the two chamber bodies, is placed into the containment cavity 4 of the outer cup 1.

[0088] The outer cup 1 is sealed with the cup lid 5. After the cup lid 5 is tightly fixed, the vacuum pump 8 is activated to extract air from the containment cavity 4 and the refrigeration body 7, forming a vacuum environment inside the portable breast milk cooler.

[0089] The embodiments described above are merely exemplary descriptions of this application and do not limit the scope of this application. Without departing from the design spirit of this application, various modifications and improvements made by those of ordinary skill in the art to the technical solutions of this application shall fall within the scope of protection determined by this application.

Examples

embodiment 1

[0049]This embodiment provides a portable breast milk cooler, as shown in FIGS. 1-9, mainly including an outer cup 1, an inner cup 6, and a cup lid 5, where the inner cup 6 is configured to store food or medicine requiring low-temperature preservation, such as breast milk.

[0050] The outer cup 1 includes an inner cup wall 2 and an outer cup wall 3 sleeving the inner cup wall 2, where a gap between the inner cup wall 2 and the outer cup wall 3 is configured as a first vacuum structure, and a space enclosed by the inner cup wall 2 forms a containment cavity 4. The cup lid 5 is provided with a second vacuum structure, and the cup lid 5 is configured to seal the containment cavity 4.

[0051] The portable breast milk cooler in this embodiment is provided with at least one independently sealed inner cup 6, where the inner cup 6 is contained within the containment cavity 4, with a peripheral wall and a bottom surrounded by the vacuum structure of the outer cup 1.

[0052] The portable breast mil...

embodiment 2

[0068]This embodiment provides a portable breast milk cooler, as shown in FIGS. 1-9, mainly including an outer cup 1, an inner cup 6, and a cup lid 5, where the inner cup 6 is configured to store food or medicine requiring low-temperature preservation, such as breast milk.

[0069] The outer cup 1 includes an inner cup wall 2 and an outer cup wall 3 sleeving the inner cup wall 2, where a gap between the inner cup wall 2 and the outer cup wall 3 is configured as a first vacuum structure, and a space enclosed by the inner cup wall 2 forms a containment cavity 4. The cup lid 5 is provided with a second vacuum structure, and the cup lid 5 is configured to seal the containment cavity 4.

[0070] The portable breast milk cooler in this embodiment is provided with at least one independently sealed inner cup 6 therein, where the inner cup 6 is contained within the containment cavity 4, with a peripheral wall and a bottom surrounded by the vacuum structure of the outer cup 1.

[0071] The portable br...

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese Patent Application No. 202422595814.6, filed on Oct. 12, 2024, and Chinese Patent Application No. 202521837219.7, filed on Aug. 27, 2025. All of the aforementioned applications are incorporated herein by reference in their entireties.TECHNICAL FIELD

[0002] This application relates to the technical field of daily necessities, specifically to a portable breast milk cooler.BACKGROUND

[0003] In daily life, certain foods and medicines require refrigerated storage, such as breast milk and insulin, which need to be kept at a specific temperature. A refrigerator is a commonly used device for refrigerating items, but when people go out and must carry certain foods or medicines that require low-temperature storage, refrigerating these items becomes a challenging issue.

[0004] Currently, portable refrigeration cups have appeared on the market. These refrigeration cups mainly include an outer cup, an inner cup for storing food or medicine, and a cup lid, with a cold-retaining layer provided between the inner cup and the outer cup to keep the food or medicine in the inner cup at a low temperature, preventing spoilage or loss of efficacy.

[0005] For example, Chinese Patent Publication CN220229617U disclosed a portable refrigeration cup capable of reducing temperature variations within a refrigeration cavity. The refrigeration cup in this solution includes a cylindrical refrigeration cup body, within which a cylindrical refrigeration cavity coaxial with the refrigeration cup body is provided. The height of the refrigeration cavity is greater than the length of any line segment on the horizontal cross-section of the refrigeration cavity. An insulation layer is closely attached to an outer side wall of the refrigeration cup body, and a refrigeration apparatus is provided to absorb heat from the refrigeration cavity and transfer the heat to the outside of the refrigeration cup body. The refrigeration apparatus is electrically driven, and the cup body is further provided with a control panel, a cooling fan, a display window, and other structures.

[0006] In another example, a refrigeration cup disclosed in Chinese Patent Publication CN206187688U includes an outer cup body, an inner liner, and a cup lid, where a sealed cavity is formed between the outer cup body and the inner liner to hold a chemical material package and a chemical adsorption package. The chemical material package contains substances capable of refrigeration through a chemical endothermic reaction. When the substances in the chemical material package undergo a chemical reaction, a large amount of heat is absorbed, thereby refrigerating the food or medicine inside the inner liner. This refrigeration cup has a simple structure and does not require electricity.

[0007] Although the above or structurally similar refrigeration cups achieve portability and improve user convenience, their cold-retaining effects vary, and sustained refrigeration performance cannot be guaranteed, affecting the user experience.SUMMARY

[0008] A purpose of this application is to improve the refrigeration efficiency of a refrigeration cup and prolong the refrigeration preservation time of food or medicine within the cup.

[0009] To achieve the above purpose, this application provides a portable breast milk cooler, including:

[0010] an outer cup, including an inner cup wall and an outer cup wall sleeving the inner cup wall, where a gap between the inner cup wall and the outer cup wall forms a first vacuum structure, and a space enclosed by the inner cup wall forms a containment cavity;

[0011] a cup lid, provided with a second vacuum structure, where the cup lid is configured to seal the containment cavity;

[0012] at least one independently sealed inner cup, configured to contain a substance to be refrigerated, where the inner cup is contained within the containment cavity; and

[0013] a refrigeration body, filled with an agent for retaining cold, where the refrigeration body is disposed in a gap between the inner cup wall and the inner cup and at least surrounds an outer peripheral wall of the inner cup, and the refrigeration body is recyclable.

[0014] Preferably, the cup lid includes a connection portion configured to be connected to a cup mouth of the outer cup and a sealed cavity, where a lower part of the sealed cavity is provided with a second sealing member configured to be sealingly connected to the inner cup wall.

[0015] More preferably, the inner cup wall forms an inclined surface tilted towards the center of the portable breast milk cooler, the second sealing member has a same inclination angle as the inclined surface, and the second sealing member achieves sealing at the inclined surface through compression and deformation; or

[0016] the inner cup wall does not form the inclined surface, a lower part of the sealed cavity is provided along a circumference thereof with a plurality of second sealing members in a form of annular protrusions, and the second sealing members achieve sealing at the inner cup wall through compression and deformation.

[0017] Preferably, the refrigeration body includes a plurality of annular structures open at both ends, the annular structures sleeve an outer part of the inner cup, and the annular structures are connected by stacking.

[0018] More preferably, the annular structure has one end provided with a protrusion and the other end provided with a notch, and when adjacent two of the annular structures are stacked, the protrusion of one annular structure is limited within the notch of the other annular structure.

[0019] Preferably, the refrigeration body includes a plurality of chamber bodies open at one end, and an opening of one chamber body is detachably connected to an opening of another corresponding chamber body; and

[0020] after corresponding adjacent two of the chamber bodies are connected to form a containment space, the containment space is used for containing one such inner cup.

[0021] More preferably, half of the chamber bodies are each circumferentially provided with a plurality of engagement blocks at an outer wall of the opening;

[0022] the other half of the chamber bodies are each circumferentially provided with openings allowing the engagement blocks to slide therein at an inner wall of the opening; and

[0023] the openings connect limiting portions in communication therewith, and after the engagement blocks slide into the openings, rotating one of the chamber bodies causes the engagement blocks to slide into the limiting portions.

[0024] Preferably, the refrigeration body is provided, along an axial direction on an outer wall, with a first airflow channel for enlarging the gap with the inner cup wall; and / or

[0025] the opening of the chamber body is provided with a second airflow channel communicating with an interior of the containment space.

[0026] Preferably, the sealed cavity is provided with a vacuum pumping assembly, a power supply module, a control module, a display window, and a temperature sensing module therein; where

[0027] the vacuum pumping assembly is configured to form a vacuum environment inside the portable breast milk cooler;

[0028] the power supply module is configured to supply power to all electrical devices within the cup lid, and the temperature sensing module is configured to detect a temperature of the containment cavity; and

[0029] the control module is connected to all the vacuum pumping assembly, the display window, and the temperature sensing module, and the display window at least displays the temperature and a vacuum degree of the containment cavity.

[0030] More preferably, the second vacuum structure includes a first vacuum region and a second vacuum region, and the first vacuum region surrounds a circumferential wall of the cup lid; and

[0031] the second vacuum region is configured such that after the containment cavity is sealed by the cup lid, the second vacuum region is located directly above a top of the containment cavity.

[0032] The technical solution claimed by this application primarily achieves the following beneficial effects.

[0033] In the portable breast milk cooler structure of this application, an inner cup for storing a substance to be refrigerated can be entirely surrounded by a refrigeration body. When the inner cup is placed in a containment cavity of an outer cup, a vacuum layer of the outer cup provides further thermal insulation to a peripheral wall and a bottom of the inner cup. When a cup lid is closed, a hollow structure in the cup lid further provides thermal insulation to a top of the inner cup. Thus, the inner cup is simultaneously subjected to triple cold-retaining and thermal-insulating effects from the refrigeration body, a vacuum layer of the outer cup, and a vacuum layer of the cup lid, improving the refrigeration efficiency for the substance contained therein and prolonging the refrigeration preservation time.

[0034] A connection portion and a second sealing member on the cup lid simultaneously seal a space within the containment cavity, further isolating heat exchange between the interior and exterior of the portable breast milk cooler, thus improving the cold-retaining and thermal-insulating effects.

[0035] A vacuum assembly in the cup lid can form a vacuum in a containment cavity of the outer cup and a containment space formed by the refrigeration body after the inner cup, the refrigeration body, and the outer cup are assembled, isolating external heat from entering the cup, enhancing the cold-retaining and thermal-insulating effects, improving the refrigeration efficiency of the substance in the inner cup, and prolonging its storage time.BRIEF DESCRIPTION OF THE DRAWINGS

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the following briefly describes the drawings required for the description of the embodiments. Obviously, the drawings described below are merely embodiments of this application, and those of ordinary skill in the art can obtain other drawings based on the provided drawings without creative effort.

[0037] FIG. 1 is a schematic diagram of a three-dimensional structure of a portable breast milk cooler.

[0038] FIG. 2 is a cross-sectional view of the portable breast milk cooler when a refrigeration body is an annular structure.

[0039] FIG. 3 is a schematic diagram of the annular structure.

[0040] FIG. 4 is a cross-sectional view of the portable breast milk cooler when the refrigeration body is configured as a chamber body.

[0041] FIG. 5 is a schematic structural diagram where two chamber bodies are connected at their openings to accommodate an inner cup internally.

[0042] FIG. 6 is a cross-sectional view of FIG. 5.

[0043] FIG. 7 is a schematic structural diagram of an individual chamber body.

[0044] FIG. 8 is a schematic structural diagram of another chamber body that engages with the chamber body in FIG. 7.

[0045] FIG. 9 is a schematic diagram of an internal structure of a cup lid.

[0046] FIG. 10 is a schematic diagram of a sealing structure between the cup lid and an outer cup.

[0047] FIG. 11 is an enlarged schematic diagram of the sealing structure between the cup lid and the outer cup.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0048] To make the objectives, technical solutions, and beneficial effects of the embodiments in this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below with reference to the drawings in the embodiments of this application. Obviously, the described embodiments are some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort fall within the scope of protection of this application.Embodiment 1

[0049] This embodiment provides a portable breast milk cooler, as shown in FIGS. 1-9, mainly including an outer cup 1, an inner cup 6, and a cup lid 5, where the inner cup 6 is configured to store food or medicine requiring low-temperature preservation, such as breast milk.

[0050] The outer cup 1 includes an inner cup wall 2 and an outer cup wall 3 sleeving the inner cup wall 2, where a gap between the inner cup wall 2 and the outer cup wall 3 is configured as a first vacuum structure, and a space enclosed by the inner cup wall 2 forms a containment cavity 4. The cup lid 5 is provided with a second vacuum structure, and the cup lid 5 is configured to seal the containment cavity 4.

[0051] The portable breast milk cooler in this embodiment is provided with at least one independently sealed inner cup 6, where the inner cup 6 is contained within the containment cavity 4, with a peripheral wall and a bottom surrounded by the vacuum structure of the outer cup 1.

[0052] The portable breast milk cooler in this embodiment further includes a recyclable refrigeration body 7, and the refrigeration body 7 may exemplarily be configured as a double-layer structure, filled with an agent for retaining cold, such as a soluble polymer with main components of low-degree polymerized sodium polyacrylate, polyvinyl alcohol, or polyacrylamide. Additionally, partitions or grids may be provided inside the refrigeration body to make the distribution of the cold-retaining agent more uniform while enhancing the mechanical strength of the refrigeration body. The refrigeration body 7 is disposed in a gap between the inner cup wall 2 and the inner cup 6 and at least surrounds an outer peripheral wall of the inner cup 6. The refrigeration body 7 is in clearance fit with the inner cup wall 2, and the inner cup 6 is also in clearance fit with the refrigeration body 7. Both the refrigeration body 7 and the inner cup 6 can be removed from the containment cavity 4.

[0053] In the portable breast milk cooler structure of this embodiment, the inner cup 6 for storing a substance to be refrigerated can be surrounded by the refrigeration body 7. When the inner cup 6 is placed in the containment cavity 4 of the outer cup 1, a vacuum layer of the outer cup 1 provides further thermal insulation to a peripheral wall and a bottom of the inner cup 6. When the cup lid 5 is closed, a hollow structure in the cup lid 5 further provides thermal insulation to a top of the inner cup 6. Thus, the inner cup 6 is simultaneously subjected to triple cold-retaining and thermal-insulating effects from the refrigeration body 7, the vacuum layer of the outer cup 1, and a vacuum layer of the cup lid 5, improving the refrigeration efficiency for the substance contained therein and prolonging the refrigeration preservation time.

[0054] In a preferred solution, as shown in FIG. 9, the cup lid 5 is provided with a vacuum pumping assembly for forming a vacuum environment inside the portable breast milk cooler, a power supply module 10, a control module 11, a display window 12, and a temperature sensing module 13. Exemplarily, the vacuum pumping assembly includes a vacuum pump 8 and a vacuum control valve 9 connected to the vacuum pump 8. The vacuum control valve 9 may be configured to connect to a button, allowing a user to control the activation or release of the vacuum pump 8 by pressing the button. After the cup lid 5 is closed, the vacuum pump 8 communicates with the containment cavity 4 to extract air from the containment cavity 4, forming a vacuum environment within the containment cavity 4, isolating external heat from entering the cup, and enhancing the thermal insulation effect. Additionally, an independent one-way valve may be provided, and the one-way valve is controlled to achieve communication between the containment cavity 4 and the outside, thereby releasing the vacuum in the containment cavity 4.

[0055] The power supply module 10 (for example, a rechargeable battery) is configured to supply power to all electrical devices within the cup lid 5, and the temperature sensing module 13 (for example, a temperature probe) is configured to detect a temperature of the containment cavity 4. The control module 11 (for example, a PCB control board) is connected to all the vacuum pumping assembly, the display window 12 (a display screen), and the temperature sensing module 13, and the display window 12 at least displays the temperature and a vacuum degree of the containment cavity 4, facilitating observation of the user. In this embodiment, the temperature sensing module 13, the control module 11, the vacuum pumping assembly, and the like are accommodated in an internal space of the cup lid 5 through compression fixing. Alternatively, in another exemplary structure, the vacuum pump 8 may not be provided inside the cup lid 5, and the portable breast milk cooler may form a vacuum environment inside through connection between the vacuum control valve 9 and an external vacuum pumping device.

[0056] In an exemplary structure, referring to FIG. 4, the second vacuum structure in the cup lid 5 includes a first vacuum region 14 and a second vacuum region 15, where the first vacuum region 14 surrounds a circumferential wall of the cup lid 5 and is disposed above a joint where the cup lid 5 is sealingly connected to the outer cup 1. The second vacuum region 15 is configured such that after the containment cavity 4 is sealed by the cup lid 5, the second vacuum region 15 is located directly above a top of the containment cavity 4. The second vacuum region 15 is positioned lower than the first vacuum region 14, and an area of the second vacuum region 15 is set to be as large as possible to reduce a gap between the vacuum region and a vacuum layer of the cup body, preventing external heat from entering the cup. Preferably, a bottom of the cup lid 5 may be provided with a first sealing member 16 for further sealing the second vacuum region inside the cup lid 5, and a filter sheet is provided below the second vacuum region 15. The filter sheet is used to filter air in the containment cavity during the vacuum pumping process to minimize the intake of dust and other impurities inside the cup body into the vacuum pump, and a dual vacuum structure in the cup lid 5 further enhances the thermal insulation effect.

[0057] In this embodiment, the vacuum assembly in the cup lid 5 can form a vacuum in the containment cavity 4 of the outer cup 1 and a containment space 21 formed by the refrigeration body 7 after the inner cup 6, the refrigeration body 7, and the outer cup 1 are assembled, enhancing the cold-retaining and thermal-insulating effects, improving the refrigeration efficiency of the substance in the inner cup, and prolonging its storage time.

[0058] In an exemplary structure, the cup lid 5 is connected to the outer cup 1 through threading; alternatively, an elastic sealing structure (for example, a silicone ring, not shown in the figure) may be provided circumferentially at a lower part of the cup lid 5, with a diameter of the sealing structure being greater than an inner diameter of a cup mouth of the outer cup 1. The sealing structure achieves sealing of the containment cavity 4 through compression and deformation at an inner wall of the cup mouth of the outer cup 1 after entering the cup mouth of the outer cup 1.

[0059] In a preferred structure, a vacuum region 27 is formed at a joint between the inner cup wall 2 and the outer cup wall 3 of the outer cup 1 at the cup mouth, and the vacuum region 27 is in communication with the first vacuum structure. Exemplarily, the cup lid 5 includes a connection portion 28 for threaded connection or sealing connection through compression with the outer cup 1 and a sealed cavity 29 for accommodating the vacuum assembly, the power supply module 10, the control module 11, the temperature sensing module 13, and other components.

[0060] In another more preferred structure, a sealing connection is also formed between the cup lid 5 and the inner cup wall 2. Exemplarily, as shown in FIGS. 10 and 11, the inner cup wall 2 forms an inclined surface 30 tilted toward a center of the portable breast milk cooler below the vacuum region 27, a lower part of the sealed cavity 29 is provided with a second sealing member 31 sealingly connected to the inclined surface 30, the second sealing member 31 has an inclination angle corresponding to the inclined surface 30, and the second sealing member 31 achieves sealing at the inclined surface 30 through compression and deformation. A conical sealing structure between the inner cup wall 2 and the cup lid 5 facilitates the opening of the cup lid 5 while sealing the containment cavity 4.

[0061] In another exemplary structure, the inner cup wall 2 does not form an inclined surface, a lower part of the sealed cavity 29 of the cup lid 5 is provided circumferentially with a plurality of second sealing members 31 in a form of annular protrusions, and in this structure, the second sealing members 31 achieve an engagement sealing at the inner cup wall 2 through compression and deformation to seal the containment cavity 4. Certainly, a conical sealing connection structure and an engagement sealing connection structure may be used in combination, for example, by providing the engagement sealing structure below the conical sealing structure.

[0062] In this embodiment, the second sealing member 31 may be made of an elastic material, such as silicone. The connection portion 28 and the second sealing member 31 on the cup lid 5 simultaneously seal a space within the containment cavity 4, further isolating heat exchange between the interior and exterior of the portable breast milk cooler, thus improving the cold-retaining and thermal-insulating effects.

[0063] In an exemplary structure, as shown in FIGS. 2 and 3, the refrigeration body 7 includes a plurality of annular structures 17 open at both ends, the annular structures 17 sleeve an outer part of the inner cup 6, and the annular structures 17 are connected by stacking. For example, one end of the annular structure 17 may be provided with a protrusion 18, and the other end may be provided with a notch 19. When two adjacent annular structures 17 are stacked, the protrusion 18 of one annular structure 17 is limited within the notch 19 of the other annular structure 17.

[0064] The usage process of the portable breast milk cooler in this embodiment is as follows:

[0065] When a substance needs to be refrigerated, the substance is placed into the inner cup 6, and the inner cup 6 is sealed. The sealed inner cup 6 is then placed into the containment cavity 4 of the outer cup 1.

[0066] The inner cup 6 is sleeved with annular structures 17 pre-treated with low-temperature refrigeration (for example, pre-refrigerated in a refrigerator) until the annular structures 17 are stacked to completely surround a peripheral wall of the inner cup 6, and a cold-retaining agent in the annular structures 17 is used to keep the substance to be refrigerated at a low temperature.

[0067] The outer cup 1 is sealed with the cup lid 5. After the cup lid 5 is tightly fixed, the vacuum pump 8 is activated to extract air from the containment cavity 4 and the refrigeration body 7, forming a vacuum environment inside the portable breast milk cooler.Embodiment 2

[0068] This embodiment provides a portable breast milk cooler, as shown in FIGS. 1-9, mainly including an outer cup 1, an inner cup 6, and a cup lid 5, where the inner cup 6 is configured to store food or medicine requiring low-temperature preservation, such as breast milk.

[0069] The outer cup 1 includes an inner cup wall 2 and an outer cup wall 3 sleeving the inner cup wall 2, where a gap between the inner cup wall 2 and the outer cup wall 3 is configured as a first vacuum structure, and a space enclosed by the inner cup wall 2 forms a containment cavity 4. The cup lid 5 is provided with a second vacuum structure, and the cup lid 5 is configured to seal the containment cavity 4.

[0070] The portable breast milk cooler in this embodiment is provided with at least one independently sealed inner cup 6 therein, where the inner cup 6 is contained within the containment cavity 4, with a peripheral wall and a bottom surrounded by the vacuum structure of the outer cup 1.

[0071] The portable breast milk cooler in this embodiment further includes a recyclable refrigeration body 7, and the refrigeration body 7 may exemplarily be configured as a double-layer structure, filled with an agent for retaining cold, such as a soluble polymer with main components of low-degree polymerized sodium polyacrylate, polyvinyl alcohol, or polyacrylamide. Additionally, partitions or grids may be provided inside the refrigeration body to make the distribution of the cold-retaining agent more uniform while enhancing the mechanical strength of the refrigeration body. The refrigeration body 7 is disposed in a gap between the inner cup wall 2 and the inner cup 6 and at least surrounds an outer peripheral wall of the inner cup 6. The refrigeration body 7 is in clearance fit with the inner cup wall 2, and the inner cup 6 is also in clearance fit with the refrigeration body 7. Both the refrigeration body 7 and the inner cup 6 can be removed from the containment cavity 4.

[0072] In the portable breast milk cooler structure of this embodiment, the inner cup 6 for storing a substance to be refrigerated can be surrounded by the refrigeration body 7. When the inner cup 6 is placed in the containment cavity 4 of the outer cup 1, a vacuum layer of the outer cup 1 provides further thermal insulation to a peripheral wall and a bottom of the inner cup 6. When the cup lid 5 is closed, a hollow structure in the cup lid 5 further provides thermal insulation to a top of the inner cup 6. Thus, the inner cup 6 is simultaneously subjected to triple cold-retaining and thermal-insulating effects from the refrigeration body 7, the vacuum layer of the outer cup 1, and a vacuum layer of the cup lid 5, improving the refrigeration efficiency for the substance contained therein and prolonging the refrigeration preservation time.

[0073] In a preferred solution, as shown in FIG. 9, the cup lid 5 is provided with a vacuum pumping assembly for forming a vacuum environment inside the portable breast milk cooler, a power supply module 10, a control module 11, a display window 12, and a temperature sensing module 13. Exemplarily, the vacuum pumping assembly includes a vacuum pump 8 and a vacuum control valve 9 connected to the vacuum pump 8. The vacuum control valve 9 may be configured to connect to a button, allowing a user to control the activation or release of the vacuum pump 8 by pressing the button. After the cup lid 5 is closed, the vacuum pump 8 communicates with the containment cavity 4 to extract air from the containment cavity 4, forming a vacuum environment within the containment cavity 4, and enhancing the thermal insulation effect. Additionally, an independent one-way valve may be provided, and the one-way valve is controlled to achieve communication between the containment cavity 4 and the outside, thereby releasing the vacuum in the containment cavity 4.

[0074] The power supply module 10 (for example, a rechargeable battery) is configured to supply power to all electrical devices within the cup lid 5, and the temperature sensing module 13 (for example, a temperature probe) is configured to detect a temperature of the containment cavity 4. The control module 11 (for example, a PCB control board) is connected to all the vacuum pumping assembly, the display window 12, and the temperature sensing module 13, and the display window 12 at least displays the temperature and a vacuum degree of the containment cavity 4, facilitating observation of the user. In this embodiment, the temperature sensing module 13, the control module 11, the vacuum pumping assembly, and the like are accommodated in an internal space of the cup lid 5 through compression fixing. Alternatively, in another exemplary structure, the vacuum pump 8 may not be provided inside the cup lid 5, and the portable breast milk cooler may form a vacuum environment inside through connection between the vacuum control valve 9 and an external vacuum pumping device.

[0075] In an exemplary structure, referring to FIG. 4, the second vacuum structure in the cup lid 5 includes a first vacuum region 14 and a second vacuum region 15, where the first vacuum region 14 surrounds a circumferential wall of the cup lid 5 and is disposed above a joint where the cup lid 5 is sealingly connected to the outer cup 1. The second vacuum region 15 is configured such that after the containment cavity 4 is sealed by the cup lid 5, the second vacuum region 15 is located directly above a top of the containment cavity 4. The second vacuum region 15 is positioned lower than the first vacuum region 14, and an area of the second vacuum region 15 is set to be as large as possible to reduce a gap between the vacuum region and a vacuum layer of the cup body, preventing external heat from entering the cup. Preferably, a bottom of the cup lid 5 may be provided with a first sealing member 16 for further sealing the second vacuum region inside the cup lid 5, and a filter sheet is provided below the second vacuum region 15. The filter sheet is used to filter air in the containment cavity during the vacuum pumping process to minimize the intake of dust and other impurities inside the cup body into the vacuum pump, and a dual vacuum structure in the cup lid 5 further enhances the thermal insulation effect.

[0076] In this embodiment, the vacuum assembly in the cup lid 5 can form a vacuum in the containment cavity 4 of the outer cup 1 and a containment space 21 formed by the refrigeration body 7 after the inner cup 6, the refrigeration body 7, and the outer cup 1 are assembled, isolating external heat from entering the cup, enhancing the cold-retaining and thermal-insulating effects, improving the refrigeration efficiency of the substance in the inner cup, and prolonging its storage time.

[0077] In an exemplary structure, the cup lid 5 is connected to the outer cup 1 through threading; alternatively, an elastic sealing structure (for example, a silicone ring, not shown in the figure) may be provided circumferentially at a lower part of the cup lid 5, with a diameter of the sealing structure being greater than an inner diameter of a cup mouth of the outer cup 1. The sealing structure achieves sealing of the containment cavity 4 through compression and deformation at an inner wall of the cup mouth of the outer cup 1 after entering the cup mouth of the outer cup 1.

[0078] In a preferred structure, a vacuum region 27 is formed at a joint between the inner cup wall 2 and the outer cup wall 3 of the outer cup 1 at the cup mouth, and the vacuum region 27 is in communication with the first vacuum structure. Exemplarily, the cup lid 5 includes a connection portion 28 for threaded connection or sealing connection through compression with the outer cup 1 and a sealed cavity 29 for accommodating the vacuum assembly, the power supply module 10, the control module 11, the temperature sensing module 13, and other components.

[0079] In another more preferred structure, a sealing connection is also formed between the cup lid 5 and the inner cup wall 2. Exemplarily, as shown in FIGS. 10 and 11, the inner cup wall 2 forms an inclined surface 30 tilted toward a center of the portable breast milk cooler below the vacuum region 27, a lower part of the sealed cavity 29 is provided with a second sealing member 31 sealingly connected to the inclined surface 30, the second sealing member 31 has an inclination angle corresponding to the inclined surface 30, and the second sealing member 31 achieves sealing at the inclined surface 30 through compression and deformation. A conical sealing structure between the inner cup wall 2 and the cup lid 5 facilitates the opening of the cup lid 5 while sealing the containment cavity 4.

[0080] In another exemplary structure, the inner cup wall 2 does not form an inclined surface, a lower part of the sealed cavity 29 of the cup lid 5 is provided circumferentially with a plurality of second sealing members 31 in a form of annular protrusions, and in this structure, the second sealing members 31 achieve an engagement sealing at the inner cup wall 2 through compression and deformation to seal the containment cavity 4. Certainly, a conical sealing connection structure and an engagement sealing connection structure may be used in combination, for example, by providing the engagement sealing structure below the conical sealing structure.

[0081] In this embodiment, the second sealing member 31 may be made of an elastic material, such as silicone. The connection portion 28 and the second sealing member 31 on the cup lid 5 simultaneously seal a space within the containment cavity 4, further isolating heat exchange between the interior and exterior of the portable breast milk cooler, thus improving the cold-retaining and thermal-insulating effects. In a preferred solution, as shown in FIGS. 4-8, the refrigeration body 7 includes a plurality of chamber bodies 20 open at one end, and an opening of one chamber body 20 is detachably connected to an opening of another chamber body 20. After two chamber bodies 20 are connected to form a containment space 21, and each containment space 21 is used for accommodating one inner cup 6. The inner cup 6 is in clearance connection to an inner wall of the chamber body 20, and a side wall, a top, and a bottom of the inner cup 6 are all surrounded by the refrigeration body.

[0082] In an exemplary structure, half of the chamber bodies 20 are each circumferentially provided with a plurality of engagement blocks 22 at an outer wall of the opening; and the other half of the chamber bodies 20 are each circumferentially provided with openings 23 allowing the engagement blocks 22 to slide therein at an inner wall of the opening. The openings 23 connect limiting portions 24 in communication therewith, and after the engagement blocks 22 slide into the openings 23, rotating one of the chamber bodies 20 causes the engagement blocks 22 to slide into the limiting portions 24, achieving fixation between the two chamber bodies 20.

[0083] Since both the refrigeration body 7 and the inner cup wall 2, as well as the inner cup 6 and the refrigeration body 7, are in clearance connection, to enable the vacuum pumping assembly to smoothly extract air from the containment cavity 4 during operation, a first airflow channel 25 is provided along an axial direction on an outer wall of the refrigeration body 7 to enlarge a gap with the inner cup wall 2. In an exemplary structure, several concave surfaces / grooves may be provided in an outer wall of the chamber body to serve as the first airflow channel 25. Furthermore, a second airflow channel 26 communicating with an interior of the containment space 21 may be provided at the opening of the chamber body 20, allowing air therein to be smoothly extracted, thus forming a vacuum environment. Any structure that can communicate with an interior of the containment space 21 at the opening joint after the two chamber bodies 20 are connected can serve as the second airflow channel 26, which is not further elaborated here.

[0084] The usage process of the portable breast milk cooler in this embodiment is as follows:

[0085] When a substance needs to be refrigerated, the substance is placed into the inner cup 6, and the inner cup 6 is sealed.

[0086] The sealed inner cup 6 is placed into a chamber body 20 pre-treated with low-temperature refrigeration (for example, pre-refrigerated in a refrigerator), and then covered with another chamber body similarly pre-treated with low-temperature refrigeration, and rotating one of the chamber bodies causes the engagement blocks of this chamber body to slide into the limiting portions of the other chamber body, achieving a fixed connection of the two chamber bodies at the openings.

[0087] The inner cup, entirely surrounded by the two chamber bodies, is placed into the containment cavity 4 of the outer cup 1.

[0088] The outer cup 1 is sealed with the cup lid 5. After the cup lid 5 is tightly fixed, the vacuum pump 8 is activated to extract air from the containment cavity 4 and the refrigeration body 7, forming a vacuum environment inside the portable breast milk cooler.

[0089] The embodiments described above are merely exemplary descriptions of this application and do not limit the scope of this application. Without departing from the design spirit of this application, various modifications and improvements made by those of ordinary skill in the art to the technical solutions of this application shall fall within the scope of protection determined by this application.

Examples

embodiment 1

[0049]This embodiment provides a portable breast milk cooler, as shown in FIGS. 1-9, mainly including an outer cup 1, an inner cup 6, and a cup lid 5, where the inner cup 6 is configured to store food or medicine requiring low-temperature preservation, such as breast milk.

[0050] The outer cup 1 includes an inner cup wall 2 and an outer cup wall 3 sleeving the inner cup wall 2, where a gap between the inner cup wall 2 and the outer cup wall 3 is configured as a first vacuum structure, and a space enclosed by the inner cup wall 2 forms a containment cavity 4. The cup lid 5 is provided with a second vacuum structure, and the cup lid 5 is configured to seal the containment cavity 4.

[0051] The portable breast milk cooler in this embodiment is provided with at least one independently sealed inner cup 6, where the inner cup 6 is contained within the containment cavity 4, with a peripheral wall and a bottom surrounded by the vacuum structure of the outer cup 1.

[0052] The portable breast mil...

embodiment 2

[0068]This embodiment provides a portable breast milk cooler, as shown in FIGS. 1-9, mainly including an outer cup 1, an inner cup 6, and a cup lid 5, where the inner cup 6 is configured to store food or medicine requiring low-temperature preservation, such as breast milk.

[0069] The outer cup 1 includes an inner cup wall 2 and an outer cup wall 3 sleeving the inner cup wall 2, where a gap between the inner cup wall 2 and the outer cup wall 3 is configured as a first vacuum structure, and a space enclosed by the inner cup wall 2 forms a containment cavity 4. The cup lid 5 is provided with a second vacuum structure, and the cup lid 5 is configured to seal the containment cavity 4.

[0070] The portable breast milk cooler in this embodiment is provided with at least one independently sealed inner cup 6 therein, where the inner cup 6 is contained within the containment cavity 4, with a peripheral wall and a bottom surrounded by the vacuum structure of the outer cup 1.

[0071] The portable br...

Claims

1. A portable breast milk cooler, comprising: an outer cup, comprising an inner cup wall and an outer cup wall sleeving the inner cup wall, wherein a gap between the inner cup wall and the outer cup wall forms a first vacuum structure, and a space enclosed by the inner cup wall forms a containment cavity;a cup lid, provided with a second vacuum structure, wherein the cup lid is configured to seal the containment cavity;at least one independently sealed inner cup, configured to contain a substance to be refrigerated, wherein the inner cup is contained within the containment cavity; anda refrigeration body, filled with an agent for retaining cold, wherein the refrigeration body is disposed in a gap between the inner cup wall and the inner cup and at least surrounds an outer peripheral wall of the inner cup, and the refrigeration body is recyclable.

2. The portable breast milk cooler according to claim 1, wherein the cup lid comprises a connection portion configured to be connected to a cup mouth of the outer cup and a sealed cavity, and a lower part of the sealed cavity is provided with a second sealing member configured to be sealingly connected to the inner cup wall.

3. The portable breast milk cooler according to claim 2, wherein the inner cup wall forms an inclined surface tilted towards a center of the portable breast milk cooler, the second sealing member has a same inclination angle as the inclined surface, and the second sealing member achieves sealing at the inclined surface through compression and deformation; orthe inner cup wall does not form the inclined surface, a lower part of the sealed cavity is provided along a circumference of the sealed cavity with a plurality of second sealing members in a form of annular protrusions, and the second sealing members achieve sealing at the inner cup wall through compression and deformation.

4. The portable breast milk cooler according to claim 1, wherein the refrigeration body comprises a plurality of annular structures open at both ends, the annular structures sleeve an outer part of the inner cup, and the annular structures are connected by stacking.

5. The portable breast milk cooler according to claim 4, wherein the annular structure has one end provided with a protrusion and the other end provided with a notch, and when adjacent two of the annular structures are stacked, the protrusion of one annular structure is limited within the notch of the other annular structure.

6. The portable breast milk cooler according to claim 1, wherein the refrigeration body comprises a plurality of chamber bodies open at one end, and an opening of one chamber body is detachably connected to an opening of another corresponding chamber body; andafter corresponding adjacent two of the chamber bodies are connected to form a containment space, the containment space is used for containing one such inner cup.

7. The portable breast milk cooler according to claim 6, wherein half of the chamber bodies are each circumferentially provided with a plurality of engagement blocks at an outer wall of the opening;the other half of the chamber bodies are each circumferentially provided with openings allowing the engagement blocks to slide therein at an inner wall of the opening; andthe openings connect limiting portions in communication therewith, and after the engagement blocks slide into the openings, rotating one of the chamber bodies causes the engagement blocks to slide into the limiting portions.

8. The portable breast milk cooler according to claim 7, wherein the refrigeration body is provided, along an axial direction on an outer wall, with a first airflow channel for enlarging the gap with the inner cup wall; and / orthe opening of the chamber body is provided with a second airflow channel communicating with an interior of the containment space.

9. The portable breast milk cooler according to claim 2, wherein the sealed cavity is provided with a vacuum pumping assembly, a power supply module, a control module, a display window, and a temperature sensing module therein; the vacuum pumping assembly is configured to form a vacuum environment inside the portable breast milk cooler;the power supply module is configured to supply power to all electrical devices within the cup lid, and the temperature sensing module is configured to detect a temperature of the containment cavity; andthe control module is connected to all the vacuum pumping assembly, the display window, and the temperature sensing module, and the display window at least displays the temperature and a vacuum degree of the containment cavity.

10. The portable breast milk cooler according to claim 2, wherein the second vacuum structure comprises a first vacuum region and a second vacuum region, and the first vacuum region surrounds a circumferential wall of the cup lid; andthe second vacuum region is configured such that after the containment cavity is sealed by the cup lid, the second vacuum region is located directly above a top of the containment cavity.

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