Description:TECHNICAL FIELD
[0001] The present disclosure relates to the field of self-heating pressurise containers. In particular, the present disclosure relates to a reusable self-heating device to heat and cook ready-to-eat foods or beverages while maintaining a secure seal to prevent spillage and incorporating a pressure maintaining and relief mechanism.

BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] Conventional tumblers and thermally-insulated containers play a pivotal role in modern day-to-day life, serving as indispensable tools for the storage and conveyance of both hot and cold beverages, as well as various food items. These containers, designed with the intention of preserving the temperature of their contents, have become ubiquitous in households, workplaces, and during travel.
[0004] However, a significant drawback lies in the reliance of these containers on external heat sources for reheating. Traditionally, individuals resort to appliances like microwaves or stovetops to warm the contents within. This dependence on external heat sources can lead to inconveniences, particularly in scenarios where immediate access to such equipment is not readily available. For instance, during outdoor adventures, extended travel, or emergency situations, the absence of a reliable heating source can hamper the enjoyment and utility of these containers, leaving users with limited options.
[0005] While remote traveling in high-altitude areas low air pressure makes it difficult to cook food and beverages. A pressurised container like a pressure cooker is needed for making food items.
[0006] There is, therefore, a need to provide a simple cost-effective, and environment-friendly self-heating device that is capable of heating and cooking ready-to-eat food items and it should be able to maintain increased pressure inside so it can heat and cook food evenly at high altitude areas.

OBJECTS OF THE INVENTION
[0007] A general object of the present disclosure is to provide a self-heating device that offers the convenience of heating and cooking ready-to-eat food items without the need for external heating equipment.
[0008] Another object of the present disclosure is to provide a self-heating device that allows users to heat their beverages wherever they are, whether at home, in the office, during travel, or outdoors.
[0009] Another object of the present disclosure is to provide a self-heating device that is made of eco-friendly materials.
[0010] Another object of the present disclosure is to provide a self-heating device that is able to provide pressurised environment inside so that the ready-to-eat food can be heated/cooked effectively even at high altitude areas like the Himalayan mountain range etc..

SUMMARY
[0011] The present disclosure relates to the field of self-heating containers. In particular, the present disclosure relates to a reusable self-heating device to heat and cook ready-to-eat foods or beverages while maintaining an internal pressure for effective cooking/heating
[0012] In an aspect, the self-heating device (interchangeably referred to as device hereafter) includes an outer container comprising a first section and a second section, configured to slide over each other and an inner container coaxially disposed of within the second section of the outer container, the inner container is configured to receive and accommodate one or more food items. The first section and the second section slide over a sliding shell configured between them. Additionally, the device includes a heating means disposed of in the bottom of the second section such that the heating means remains in contact with the outer surface of the inner container upon positioning of the inner container in the bottom section. The heating means configured to emit heat to the outer surface of the inner container to cook food items. Further, the device includes a first lid detachably coupled on the top section of the outer container to provide an airtight seal and an insulating sleeve configured around the outer container to prevent heat dissipation from the device into the ambient.
[0013] In an aspect, the device includes a second lid detachably configured on top of the inner container. The second lid includes one or more holes in the periphery, and a raised portion at the center, creating a cavity to prevent water contaminants from the heating means from entering in the inner container but being able to maintain the same pressure in both the containers. The cavity also prevents choking of pressure relief valves by accumulating food and other contaminants during pressure release.
[0014] In an aspect, the device includes one or more pressure relief valves configured with the first lid. A first pressure relief valve among the one or more pressure relief valves is a dead weight valve, operable to open and close at a predetermined pressure of approximately 1 bar. Further, a second pressure relief valve among the one or more pressure relief valves is a spring-type safety valve, operable to open at a predetermined pressure of approximately 0.8 bar, and a third pressure relief valve among the one or more pressure relief valves is a safety pressure relief valve.
[0015] In an aspect, the second lid includes at least one passage to allow outflow of steam from the inner container towards the one or more pressure relief valves.
[0016] In an aspect, the heating means may be a heating pouch including a water-activating heating compound, that is configured to generate heat through a chemical reaction, upon interaction with water being poured within the outer container. The water-activating heating compound of the heating pouch is a chemical mixture selected from a group consisting of exothermic reactions or phase change materials.
[0017] In an aspect, the device further includes a locking mechanism configured between the top lid and the outer container to prevent spillage of stored one or more food items.
[0018] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[0020] FIG. 1 illustrates perspective view of a self-heating device, in accordance with embodiments of the present disclosure.
[0021] FIG. 2 illustrates cross section views of a self-heating device, in accordance with embodiments of the present disclosure.
[0022] FIG. 3 illustrates exploded views of a self-heating device, in accordance with embodiments of the present disclosure

DETAILED DESCRIPTION
[0023] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[0024] Embodiments explained herein relate generally to a self-heating pressurised device (interchangeably referred to as device hereafter) including an outer container and an inner container. The outer container is divided into a first section and a second section and configured to slide over each other, the first section and the second section slide over a sliding shell configured therebetween. The inner container is coaxially disposed of within the second section of the outer container, the inner container is configured to receive and accommodate one or more food items. Additionally, the device includes a heating means disposed of in the bottom of the second section such that the heating means remains in contact with the outer surface of the inner container upon positioning of the inner container in the bottom section. The heating means configured to emit heat to the outer surface of the inner container to cook food items. Further, the device includes a first lid detachably coupled on the top section of the outer container to provide an airtight seal and an insulating sleeve configured around the outer container to prevent heat dissipation from the device into the ambient.
[0025] In an embodiment, the device includes a second lid detachably configured on top of the inner container. The second lid includes one or more holes in a periphery wall, and a raised portion creating a cavity at the centre to prevent water contaminants from the heating means from entering the inner container.
[0026] In an embodiment, the device includes one or more pressure relief valves configured with the first lid. A first pressure relief valve among the one or more pressure relief valves is a dead weight valve, operable to open and close at a predetermined pressure of approximately 1 bar. Further, a second pressure relief valve among the one or more pressure relief valves is a spring-type safety valve, operable to open at a predetermined pressure of approximately 0.8 bar, and a third pressure relief valve among the one or more pressure relief valves is a safety pressure relief valve.
[0027] In an embodiment, the second lid includes at least one passage to allow outflow of steam from the inner container towards the one or more pressure relief valves.
[0028] In an embodiment, the heating means may be a heating pouch including a water-activating heating compound, that is configured to generate heat through a chemical reaction, upon interaction with water being poured within the outer container. The water-activating heating compound of the heating pouch is a chemical mixture selected from a group consisting of exothermic reactions or phase change materials.
[0029] In an embodiment, the device further includes a locking mechanism configured between the top lid and the outer container to prevent spillage of stored one or more food items.
[0030] Referring to FIG. 1 to 3, a self-heating device 100 (interchangeably referred to as device 100 hereafter) used for heating/cooking ready-to-eat food items is disclosed. In addition, although the overall shape of the device is as shown in FIG. 1, the shape of the device is in the form of a cylindrical, but it is merely an example, and it is possible to use a variety of shapes, colors, or patterns. The function of the present invention can be implemented. The device 100 includes an outer container 102, an inner container 104, a first lid 106, and a heating means 108. The outer container 102 includes a first section 102-1 and a second section 102-2, configured to slide over a sliding shell configured therebetween. The first lid 106 detachably coupled on the first section 102-1 of the outer container 102 to provide an airtight seal using a first gasket 118. The first lid 106 is configured to open and close the outer container 102 for pouring water or food items into the inner container 104. The first section 102-1 and second section 102-2 of the outer container 102 are sealed with a second gasket 120, when both sections are locked, the second gasket 120 provides an airtight seal to prevent any pressure loss from there.
[0031] In an embodiment, the device 100 is preferably made of a stainless material that is strong against impact, has excellent corrosion resistance, abrasion resistance, and heat resistance, and is easy to clean, and a handle 116 is preferably provided on the outside of the first lid 106 for easy portability.
[0032] In an embodiment, the inner container 104 is coaxially disposed of within the second section 102-2 of the outer container 102. The inner container 104 is configured to receive and accommodate one or more food items. The device 100 includes a second lid 112 detachably configured on top of the inner container 104. The top end of inner container 104 is extended to support the second lid 112 to prevent spillage of stored food items in the inner container 104. The second lid 112 includes one or more holes in periphery walls, and a raised portion at the center for creating a cavity to prevent water contaminants from the heating means from entering the inner container 104.
[0033] In an embodiment, the device 100 includes one or more pressure relief valves 114 configured with the first lid 106. Where a first pressure relief valve 114-1 among the one or more pressure relief valves 114 is a dead weight valve, operable to open and close at a predetermined pressure of approximately 1 bar, a second pressure relief valve 114-2 among the one or more pressure relief valves 114 is a spring-type safety valve, operable to open at a predetermined pressure of approximately 0.8 bar, and a third pressure relief valve 114-3 among the one or more pressure relief valves 114 is a safety pressure relief valve. The safety pressure relief valve is for preventing any kind of mishap when any one of the pressure relief valves chokes.
[0034] In an embodiment, the heating means 108 disposed of in the bottom of the second section 102-2 such that the heating means 108 remains in contact with an outer surface of the inner container 104 upon positioning of the inner container 104 in the bottom section of the second section 102-2. The heating means 108 is configured to emit heat to the outer surface of the inner container 104 to heat/cook food items. The heating means 108 is a heating pouch that includes a water-activating heating compound, that is configured to generate heat through a chemical reaction, upon interaction with water being poured within the outer container 102. The water-activating heating compound of the heating pouch 108 is a chemical mixture selected from a group consisting of exothermic reactions or phase change materials.
[0035] When water is introduced in the device 100, the heating pouch 108 generates heat and converts water into steam. The generated steam increases pressure and temperature inside the device so the food placed in the inner container 104 gets heated or cooked.
[0036] In an embodiment, the device 100 includes at least one passage between inner container 104 and outer container 102 to allow outflow of steam from the inner container, and further exiting through the one or more holes of the second lid 112, towards the one or more pressure relief valves 114.
[0037] In an embodiment, the device 100 comprises a locking mechanism configured between the first lid 106 and the outer container 102.
[0038] In an embodiment, the device 100 includes an insulating sleeve 110 configured around the outer container 102 to prevent heat dissipation from the device into the ambient. The insulating sleeve 110 is made of rubber or heat-resistant materials.
[0039] In an embodiment, the device 100 offers the convenience of enjoying hot food and beverages without the need for external heating equipment and allows users to heat/cook their own food and beverages wherever they are, whether at home, in the office, during travel, or outdoors or at high altitude areas. Further, the device 100 when not in use two sections of the outer container 102-1 and 102-2 collapse and make them compact to carry. The device 100 also prevents leakage or spillage during use and accommodates a wide range of ready-to-eat foods like noodles, poha, upma, and beverages like soup, tea, coffee etc..
[0040] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

ADVANTAGES OF THE INVENTION
[0041] The present disclosure provides a self-heating pressurised device that offers the convenience of cooking/heating ready-to-eat foods and beverages without the need for external heating equipment.
[0042] The present disclosure provides a self-heating pressurised device that allows users to heat/cook ready-to-eat foods and beverages wherever they are, whether at home, in the office, during travel to high altitude areas, or outdoors.
[0043] The present disclosure provides a self-heating device that is made of eco-friendly materials.
[0044] The present disclosure provides a self-heating device that prevents leakage or spillage during transportation or use.
[0045] The present disclosure provides a self-heating pressurised device that can cook/heat a wide range of ready-to-eat food items like noodles, poha, upma, ready to cook foods like retorted sabji, dal rice, and beverage types like soups, tea coffee etc.,
, Claims:1. A self-heating device (100) comprising;
an outer container (102) comprising a first section (102-1) and a second section (102-2), configured to slide over each other;
an inner container (104) coaxially disposed of within the second section (102-2) of the outer container (102), wherein the inner container (104) is configured to receive and accommodate one or more food items;
a heating means (108) disposed of in the bottom of the second section (102-2) such that the heating means (108) remains in contact with an outer surface of the inner container (104) upon positioning of the inner container (104) in the bottom section of the second section (102-2), wherein the heating means (108) is configured to emit heat to heat/cook various food items.
a first lid (106) detachably coupled on the first section (102-1) of the outer container (102) to provide an airtight seal; and
an insulating sleeve (110) configured around the outer container (102) to prevent heat dissipation from the device into ambient.
2. The device (100) as claimed in claim 1, wherein the device (100) comprising a second lid (112) detachably configured on top of the inner container (104).
3. The device (100) as claimed in claim 2, wherein the second lid (112) comprises one or more holes in a periphery wall, and a raised portion at the center creating a cavity to prevent water contaminants from the heating means from entering in the inner container (104).
4. The device (100) as claimed in claim 3, wherein the device (100) further comprises one or more pressure relief valves (114) configured with the first lid (106), wherein a first pressure relief valve (114-1) among the one or more pressure relief valves (114) is a dead weight valve, operable to open and close at a predetermined pressure of approximately 1 bar.
5. The device (100) as claimed in claim 4, wherein a second pressure relief valve (114-2) among the one or more pressure relief valves (114) is a spring-type safety valve, operable to open at a predetermined pressure of approximately 0.8 bar, and a third pressure relief valve (114-3) among the one or more pressure relief valves (114) is a safety pressure relief valve.
6. The device (100) as claimed in claim 4, wherein the second lid (112) comprises at least one passage to allow outflow of steam from the inner container, and further exiting through the one or more holes of the second lid (112), towards the one or more pressure relief valves (114).
7. The device (100) as claimed in claim 1, wherein the first section (102-1) and the second section (102-2) slide over a sliding shell configured therebetween.
8. The device (100) as claimed in claim 1, wherein the heating means (108) is a heating pouch comprising a water-activating heating compound, that is configured to generate heat through a chemical reaction, upon interaction with water being poured within the outer container (102).
9. The device (100) as claimed in claim 8, wherein the water-activating heating compound of the heating pouch (108) is a chemical mixture selected from a group consisting of exothermic reactions or phase change materials.
10. The device (100) as claimed in claim 1, wherein the device (100) comprises a locking mechanism configured between the first lid (106) and the outer container (102).