CN215324547U - Self-heating container - Google Patents

Abstract

A self-heating container comprises a lower shell, a heating cavity and a heating device, wherein the upper end of the lower shell is open and is provided with a heating cavity for supplying water and accommodating a self-heating bag; the upper shell is connected to the upper end of the lower shell, the bottom of the upper shell is provided with an object placing plate for placing food, and a plurality of air holes are distributed in the object placing plate and used for enabling hot air generated in the heating cavity to enter the upper shell; the waterproof breathable film is detachably connected below the object placing plate, and the projections of the plurality of air holes in the vertical direction are all positioned on the waterproof breathable film; the cover plate is arranged at the top of the upper shell and is provided with an air outlet. Through the technical scheme, the replacement of the waterproof breathable film in the self-heating container can be realized, so that the container can be repeatedly used, the resource waste is reduced, and the edible sanitation of food is improved.

Description

Self-heating container

Technical Field

The utility model relates to the technical field of food heating equipment, in particular to a self-heating container.

Background

With the continuous improvement of living standard of people, more requirements are required on the health of food, more and more people select to carry food to solve lunch for office workers, and after a lunch, the food is cooled, and then the food needs to be heated again.

Application number CN201921857575.X discloses a closed food or beverage tank self-heating container, which comprises an outer tank, wherein a tank to be heated is placed in the outer tank, and a water cup and a self-heating powder box body are sequentially placed below the tank to be heated; the opening of the water cup faces downwards, the opening of the self-heating powder box body faces upwards, the water cup and the opening of the self-heating powder box body are oppositely arranged, a first sealing film is arranged at the opening of the water cup, and a second sealing film is arranged at the opening of the self-heating powder box body; a hole is formed above the water cup, polyester filament non-woven fabrics are pasted at the hole, and the water cup contains water; and a puncturing piece is arranged in the self-heating powder box body, and the tip of the puncturing piece faces to a second sealing film in the self-heating powder box body.

Although the self-heating container of the closed food or drink tank solves the problem of heating food, the container is a disposable heating container, cannot be reused, wastes resources and affects the use economy.

Application number CN202020540776.3 discloses a boss closed type self-heating container, which comprises an outer tank body, wherein a tank body to be heated is placed in the outer tank body, and self-heating bags are sequentially placed below the tank body to be heated; a boss is arranged in the tank body to be heated, and a plurality of first air outlet holes are formed in the outer side surface of the boss; and non-woven fabrics are pasted at the bottom of the tank body to be heated.

The boss closed self-heating container can also solve the problem of heating food, but the non-woven fabric is not easy to detach and replace after being pasted, so that the container cannot be reused, and the container is usually discarded wholly after being used, thereby seriously wasting resources.

The waterproof breathable film used in the food self-heating container on the market is usually polyester filament non-woven fabric.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: overcomes the defects of the prior art, provides a self-heating container which can replace a waterproof breathable film and can be repeatedly used.

The technical scheme adopted by the utility model is as follows: there is provided a self-heating container comprising

A lower housing having an open upper end and a heating chamber for supplying water and accommodating a self-heating pack;

the upper shell is connected with the upper end of the lower shell, the bottom of the upper shell is provided with an object placing plate for placing food, and a plurality of air holes are distributed on the object placing plate and used for enabling hot air generated in the heating cavity to enter the upper shell;

the waterproof breathable film is detachably connected below the object placing plate, and the projections of the plurality of air holes in the vertical direction are all positioned on the waterproof breathable film;

the cover plate is arranged at the top of the upper shell and is provided with an air outlet.

The utility model has the beneficial effects that: the heating chamber of casing can holding water and from the heating package down, the steam that produces in the heating chamber passes waterproof ventilated membrane earlier, then get into the casing inner chamber through the bleeder vent, food in the casing inner chamber is gone up in the steam heating, discharge from the venthole of apron at last, waterproof ventilated membrane enables the steam in heating chamber to pass through fast, when cooking food, improve boiling efficiency, waterproof ventilated membrane detachable connects in the container, can dismouting change waterproof ventilated membrane, make container repeatedly usable, reduce the waste of resource, the health of food is improved simultaneously.

Preferably, the air-permeable box further comprises a crimping piece, wherein the crimping piece is detachably connected with the bottom of the upper shell, the waterproof air-permeable film is arranged between the crimping piece and the object placing plate, and the crimping piece is provided with through holes which are corresponding to the air holes and are air-permeable. Through above-mentioned technical scheme, when the crimping piece is connected with the bottom of last casing, waterproof ventilated membrane presss from both sides at the crimping piece and puts between the thing board, makes waterproof ventilated membrane fixed, and through-hole and bleeder vent are corresponding simultaneously, do benefit to steam and pass waterproof ventilated membrane, and when the bottom of crimping piece and last casing break away from the connection, can take off the waterproof ventilated membrane after the use, the waterproof ventilated membrane of renewal again to make container repeatedly usable.

Preferably, the bottom of the upper shell is provided with magnets distributed along the circumferential direction of the upper shell, and the crimping piece and the magnets are matched and magnetically attracted. Through above-mentioned technical scheme, the crimping piece is connected with the bottom magnetism of last casing, and convenient quick dress gets the crimping piece, improves and changes waterproof ventilated membrane efficiency, and easy operation.

Preferably, the bottom of the upper shell is provided with hooks distributed along the circumferential direction of the upper shell, and the crimping piece is provided with a clamping groove matched with the hooks. Through above-mentioned technical scheme, go into the draw-in groove at the pothook after, rotate the crimping piece, the pothook can catch on the crimping piece, realizes the joint of casing and crimping piece, and when the crimping piece was rotated in the opposite direction, pothook and draw-in groove broke away from to it is convenient to connect, is favorable to the change of waterproof ventilated membrane.

Preferably, the bottom of the upper shell is provided with a positioning protrusion, and the crimping piece is provided with a positioning groove matched with the positioning protrusion. Through above-mentioned technical scheme, when the crimping piece adsorbs in the bottom of last casing, location arch and positioning groove can provide the location, make through-hole and bleeder vent align, improve the counterpoint precision, promote the quick of steam to pass through.

Preferably, a pressing strip is arranged between the pressing piece and the object placing plate, and the pressing strip presses and fixes the peripheral edge of the waterproof breathable film. Through above-mentioned technical scheme, the layering makes the neighboring of waterproof ventilated membrane compress tightly fixedly, can prevent the radial skew of waterproof ventilated membrane, makes bleeder vent and waterproof ventilated membrane align, prevents that chemical from passing through in the bleeder vent gets into the upper shell to guarantee food boiling health.

Preferably, the crimping piece is provided with a grabbing handle. Through above-mentioned technical scheme, snatch the handle and can conveniently snatch the crimping piece, improve and change waterproof ventilated membrane efficiency.

Preferably, the heating chamber includes the retaining chamber and places the thing chamber of putting of spontaneous heating package, the retaining chamber with put the thing chamber and separate the setting, still be equipped with the controller in the heating chamber, the intracavity is put to rivers income that the controller can control the retaining intracavity. Through the technical scheme, a user does not need to take the upper shell down to add water into the heating cavity, but can inject water into the water storage cavity in advance, when food in the upper shell needs to be heated, the water flows into the object placing cavity and is subjected to chemical reaction with the self-heating bag through controlling the internal controller, hot gas is generated to heat the food, the bottom surface pollution caused by taking the upper shell down is reduced, and meanwhile, the desktop is prevented from being polluted.

Preferably, the upper end in retaining chamber is equipped with the water filling port, be connected with the sealing plug on the water filling port, the lateral wall in retaining chamber is equipped with the outlet pipe that the thing chamber and the retaining chamber were put in the intercommunication, the controller is located in the retaining chamber, the controller includes piston head, piston rod and piston handle, the piston head with retaining chamber sliding fit connects, the cover is equipped with reset spring on the piston rod, reset spring has the trend that makes the piston head keep away from the motion of retaining chamber all the time. Through above-mentioned technical scheme, the water filling port can be with the water injection retaining intracavity, and the sealing plug can separate the retaining chamber and put the thing chamber, when extrusion piston handle, drives the piston head through the piston rod and removes towards retaining intracavity, and the retaining intracavity is passed through the outlet pipe inflow by extruded hydroenergy and is put the thing intracavity, and reset spring can drive the piston head and reset, makes the water storage chamber can the water injection repeatedly to make things convenient for the reuse of container.

Preferably, a limiting step is arranged in the water storage cavity, the open end of the water storage cavity is connected with an anti-falling part, one end part of the return spring, which is close to the piston head, abuts against the limiting step, and one end part of the return spring, which is close to the piston handle, abuts against the anti-falling part. Through above-mentioned technical scheme, when the extrusion piston handle, reset spring and spacing step counterbalance lean on, and reset spring compresses, and when loosening the piston handle, reset spring kick-backs, drives the piston head towards the motion of retaining chamber opening, and when reset spring and anticreep piece counterbalance leaned on, the piston head can not deviate from the retaining chamber to the play water in convenient control retaining chamber.

Preferably, one side of the sealing plug, which is close to the waterproof breathable film, is provided with a leakage-proof soup tray, and the leakage-proof soup tray and the sealing plug are of an integrally formed structure. Through above-mentioned technical scheme, the food hot water juice of water clock in the follow upper shell body can be collected to leak protection hot water juice tray, prevents that food hot water juice from taking place the reaction with self-heating package, improves the controllability of food heating, and leak protection hot water juice tray and sealing plug integrated into one piece structure make the inner structure of casing compacter down, are favorable to the installation operation.

Drawings

FIG. 1 is a schematic diagram of an explosive structure of example 1 of the present invention;

FIG. 2 is a schematic structural view of a cover plate according to embodiment 1 of the present invention;

FIG. 3 is a schematic structural view of an upper case of embodiment 1 of the present invention;

FIG. 4 is a sectional view of the lower casing of embodiment 1 of the utility model;

FIG. 5 is a schematic structural diagram of a controller according to embodiment 1 of the present invention;

FIG. 6 is a schematic structural view of a crimping member according to embodiment 1 of the utility model;

FIG. 7 is a schematic structural view of an upper case of embodiment 2 of the present invention;

FIG. 8 is a schematic structural view of a crimping member according to embodiment 2 of the utility model;

FIG. 9 is a schematic diagram of an explosive structure according to example 3 of the present invention;

fig. 10 is a schematic structural view of an upper case of embodiment 3 of the utility model;

FIG. 11 is a schematic structural view of a crimping member according to embodiment 3 of the utility model;

description of reference numerals: 1. a lower housing; 11. a heating cavity; 111. a water storage cavity; 1111. a limiting step; 112. a storage cavity; 113. a water injection port; 114. a sealing plug; 115. a water outlet pipe; 2. an upper housing; 21. a storage plate; 211. air holes are formed; 22. positioning the projection; 23. a partition plate; 24. a hook; 3. a waterproof breathable film; 4. a crimping member; 41. pressing a plate; 42. connecting the first part; 43. a second connection part; 44. a through hole; 45. a positioning groove; 46. a grasping handle; 47. a card slot; 5. a cover plate; 51. an air outlet; 52. a handle; 53. a tableware placing groove; 6. layering; 7. a controller; 71. a piston head; 72. a piston rod; 73. a piston handle; 74. a return spring; 8. a drop-off prevention member; 9. leak protection hot water juice tray.

Detailed Description

The utility model is further described with reference to the following figures and detailed description.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

Example 1

As shown in fig. 1-6, embodiment 1 of the present invention provides a self-heating container, which can replace a waterproof breathable film 3, so that the container can be reused, and comprises a lower casing 1, an upper casing 2, a waterproof breathable film 3 and a cover plate 5, wherein the upper end of the lower casing 1 is open and is provided with a heating chamber 11 for accommodating water and a self-heating pack, the heating chamber 11 comprises a water storage chamber 111 and an object placing chamber 112 for placing the self-heating pack, the upper end of the water storage chamber 111 is provided with a water filling port 113, the water filling port 113 is connected with a sealing plug 114, the sealing plug 114 separates the water storage chamber 111 from the object placing chamber 112, the water storage chamber 111 is provided with a controller 7 capable of controlling water in the water storage chamber 111 to flow into the object placing chamber 112, a user can fill water into the water storage chamber 111 in advance without taking down the upper casing 2 to add water to the heating chamber 11, and when the food in the upper casing 2 needs to be heated, by controlling the internal controller 7, water flows into the storage cavity 112 to react with the self-heating bag to generate hot gas to heat food; specifically, the controller 7 includes a piston head 71, a piston rod 72 and a piston handle 73, in this embodiment, three piston rods 72 are connected between the piston head 71 and the piston handle 73, so as to improve the stability of the piston head 71, the piston head 71 is connected with the water storage cavity 111 in a sliding fit manner, a return spring 74 is sleeved on the piston rod 72, the return spring 74 always has a tendency of making the piston head 71 move away from the water storage cavity 111, a water outlet pipe 115 communicating the object placing cavity 112 and the water storage cavity 111 is arranged on the side wall of the water storage cavity 111, when the piston handle 73 is pressed, the piston rod 72 drives the piston head 71 to move towards the water storage cavity 111, the water pressed in the water storage cavity 111 can flow into the object placing cavity 112 through the water outlet pipe 115, and then the return spring 74 can drive the piston head 71 to reset, so that the water storage cavity 111 can be filled with water repeatedly; a limiting step 1111 is arranged in the water storage cavity 111, the opening end of the water storage cavity 111 is connected with an anti-falling part 8, one end part of the return spring 74 close to the piston head 71 is abutted against the limiting step 1111, and one end part of the return spring 74 close to the piston handle 73 is abutted against the anti-falling part 8.

The upper shell 2 is connected with the upper end of the lower shell 1, the bottom of the upper shell 2 is provided with an object placing plate 21 for placing food, and a plurality of air holes 211 are distributed on the object placing plate 21 and used for enabling hot air generated in the heating cavity 11 to enter the upper shell 2; in this embodiment, go up casing 2 and lower casing 1 joint, convenient operation is connected.

The waterproof breathable film 3 is detachably connected below the object placing plate 21, and the projections of the plurality of air holes 211 in the vertical direction are all positioned on the waterproof breathable film 3; specifically, the bottom of the upper shell 2 is detachably connected with a crimping piece 4, the waterproof breathable film 3 is arranged between the crimping piece 4 and the object placing plate 21, the bottom of the upper shell 2 is provided with magnets distributed along the circumferential direction of the upper shell, the crimping piece 4 and the magnets are matched and magnetically attracted, in the embodiment, the crimping piece 4 is made of an iron plate, the surface of the crimping piece is plated with an anti-oxidation layer, the crimping piece 4 is provided with a through hole 44, and when the crimping piece 4 is magnetically attracted to the bottom of the upper shell 2, the through hole 44 is correspondingly communicated with the vent hole 211; in order to prevent the waterproof breathable film 3 from radially deviating and align the air holes 211 with the waterproof breathable film 3, a pressing strip 6 is arranged between the pressing piece 4 and the object placing plate 21, and the pressing strip 6 tightly presses and fixes the peripheral edge of the waterproof breathable film 3; in order to align the through hole 44 with the air hole 211 and improve the alignment precision, a positioning protrusion 22 is set at the bottom of the upper shell 2, and a positioning groove 45 matched with the positioning protrusion 22 is formed on the crimping piece 4; in order to facilitate the gripping of the crimp 4, a gripping handle 46 is provided on the crimp 4.

The cover plate 5 is arranged at the top of the upper shell 2, and the cover plate 5 is provided with an air outlet 51; in this embodiment, apron 5 and upper housing 2 joint still are equipped with handle 52 and tableware standing groove 53 on the apron 5, handle 52 and 5 swing joint of apron conveniently draw the container, the tableware can be placed to tableware standing groove 53, makes things convenient for fast having dinner after food heats.

One side of the sealing plug 114 close to the waterproof breathable film 3 is provided with a leakage-proof soup tray 9, and the leakage-proof soup tray 9 and the sealing plug 114 are of an integrally formed structure.

The use process comprises the following steps: the user takes down the upper shell 2 and the crimping piece 4 firstly, puts into the spontaneous heating package in putting the thing chamber 112, injects water through the water filling port 113 in the water storage chamber 111, separates putting the thing chamber 112 and the water storage chamber 111 with the sealing plug 114, then adsorbs the crimping piece 4 magnetism to the bottom of the upper shell 2, the waterproof ventilated membrane 3 is clamped between the crimping piece 4 and the putting the thing board 21, then the upper shell 2 is clamped with the lower shell 1, takes a proper amount of food to put into the inner chamber of the upper shell 2, finally the cover plate 5 is clamped with the upper shell 2; when food in the container needs to be heated, the piston handle 73 is pushed, the piston handle 73 drives the piston head 71 through the piston rod 72, the piston head 71 extrudes water in the water storage cavity 111, the water flows into the object placing cavity 112 from the water storage cavity 111 through the water outlet pipe 115, the water reacts with the self-heating bag to generate hot air, the hot air sequentially passes through the through hole 44, the waterproof breathable film 3 and the breathable hole 211 and enters the inner cavity of the upper shell 2, and the hot air heats the food and is finally discharged through the air outlet hole 51.

Example 2

As shown in fig. 7-8, the difference between the present embodiment 2 and embodiment 1 is that the bottom of the upper housing 2 is provided with hooks 24 distributed along the circumferential direction thereof, the pressing member 4 is provided with a clamping groove 47, the hooks 24 can be matched with the clamping groove 47, when the hooks 24 enter the clamping groove 47, the pressing member 4 is rotated, the hooks 24 can hook the pressing member 4, the upper housing 2 and the pressing member 4 are clamped, meanwhile, the through holes 44 are aligned with the ventilation holes 211, and when the pressing member 4 is rotated reversely, the hooks 24 are separated from the clamping groove 47, so that the connection is convenient, and the replacement of the waterproof breathable film 3 is facilitated.

Example 3

As shown in fig. 9 to 11, the self-heating container of the present embodiment 3 comprises a lower case 1, an upper case 2, a waterproof breathable film 3 and a cover plate 5, wherein the upper end of the lower case 1 is open and has a heating chamber 11 for accommodating water and a self-heating pack; a water filling port 113 is formed in the side wall of the lower casing 1, the water filling port 113 is located at the middle upper part of the side wall of the lower casing 1, and a sealing plug 114 is connected to the water filling port 113.

The upper shell 2 is connected with the upper end of the lower shell 1, the bottom of the upper shell 2 is provided with an object placing plate 21 for placing food, and a plurality of air holes 211 are distributed on the object placing plate 21 and used for enabling hot air generated in the heating cavity 11 to enter the upper shell 2; in this embodiment, the inner cavity of the upper housing 2 is provided with a partition plate 23 for separating food, so that different foods can be conveniently separated, and the influence on the taste of different foods can be reduced.

The waterproof breathable film 3 is detachably connected below the object placing plate 21, and the projections of the plurality of air holes 211 in the vertical direction are all positioned on the waterproof breathable film 3; specifically, the self-heating container further comprises a compression joint piece 4, the upper end of the compression joint piece 4 is detachably connected with the lower end of the upper shell 2, and the lower end of the compression joint piece 4 is connected with the upper end of the lower shell 1; in this embodiment, the pressing member 4 includes a pressing plate 41, a first connecting portion 42 and a second connecting portion 43, the pressing plate 41 is located between the first connecting portion 42 and the second connecting portion 43, the outer peripheral wall of the first connecting portion 42 is in threaded connection with the inner peripheral wall of the upper end of the lower casing 1, the inner peripheral wall of the second connecting portion 43 is in threaded connection with the outer peripheral wall of the lower end of the upper casing 2, the waterproof and breathable film 3 is located between the pressing plate 41 and the object placing plate 21, a through hole 44 is formed in the pressing plate 41, and the through hole 44 is correspondingly communicated with the breathable hole 211; still be equipped with layering 6 between clamp plate 41 and the thing board 21, layering 6 will the peripheral edge of waterproof ventilated membrane 3 compresses tightly fixedly.

The cover plate 5 is arranged at the top of the upper shell 2, and the cover plate 5 is provided with an air outlet 51; in the present embodiment, the cover plate 5 is screwed to the upper case 2.

The use process comprises the following steps: a user firstly takes off the upper shell 2 and the crimping piece 4, puts the self-heating bag into the heating cavity 11 of the lower shell 1, then installs and connects the lower shell 1 and the first connecting part 42, takes a new waterproof breathable film 3 and places the waterproof breathable film 3 on the pressing plate 41, presses and fixes the peripheral edge of the waterproof breathable film 3 by the pressing strip 6, connects the upper shell 2 and the second connecting part 43, makes the waterproof breathable film 3 clamped between the object placing plate 21 and the pressing plate 41, and finally connects the cover plate 5 to the upper end of the upper shell 2; when food in the container needs to be heated, the sealing plug 114 is taken down firstly, water is injected into the heating cavity 11 of the lower shell 1 through the water injection port 113, the sealing plug 114 is covered, the water in the heating cavity 11 reacts with the self-heating bag to generate hot air, the hot air sequentially passes through the through hole 44, the waterproof breathable film 3 and the air vent 211 to enter the inner cavity of the upper shell 2, and the hot air heats the food and is finally discharged through the air outlet 51.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (11)

1. A self-heating container characterized by: it comprises

A lower housing (1) having an open upper end and a heating chamber (11) for supplying water and accommodating a self-heating pack;

the heating device comprises an upper shell (2) connected to the upper end of a lower shell (1), wherein an object placing plate (21) for placing food is arranged at the bottom of the upper shell (2), and a plurality of air holes (211) are distributed in the object placing plate (21) and used for enabling hot air generated in a heating cavity (11) to enter the upper shell (2);

the waterproof breathable film (3) is detachably connected below the object placing plate (21), and projections of the plurality of air holes (211) in the vertical direction are all positioned on the waterproof breathable film (3);

the cover plate (5), the cover plate (5) is arranged on the top of the upper shell (2), and the cover plate (5) is provided with an air outlet (51).

2. The self-heating container according to claim 1, further comprising a press-connecting member (4), wherein the press-connecting member (4) is detachably connected to the bottom of the upper case (2), the waterproof air-permeable membrane (3) is disposed between the press-connecting member (4) and the object placing plate (21), and the press-connecting member (4) is provided with a through hole (44) which is air-permeable corresponding to the air-permeable hole (211).

3. A self-heating container as claimed in claim 2, wherein the bottom of the upper shell (2) is provided with magnets distributed along its circumference, and the press-fit member (4) is magnetically attracted in cooperation with the magnets.

4. A self-heating container as claimed in claim 2, wherein the bottom of the upper shell (2) is provided with hooks (24) distributed along the circumference thereof, and the pressing member (4) is provided with a slot (47) matching with the hooks (24).

5. A self-heating container as claimed in claim 3, wherein the bottom of the upper shell (2) is provided with a positioning protrusion (22), and the crimping member (4) is provided with a positioning groove (45) matched with the positioning protrusion (22).

6. A self-heating container according to claim 3, 4 or 5, wherein a bead (6) is provided between the press-connection member (4) and the placement plate (21), and the bead (6) presses and fixes the peripheral edge of the waterproof and breathable film (3).

7. A self-heating container according to claim 6, wherein said crimping member (4) is provided with a gripping handle (46).

8. The self-heating container according to claim 1, wherein the heating cavity (11) comprises a water storage cavity (111) and a storage cavity (112) for storing the self-heating bag, the water storage cavity (111) and the storage cavity (112) are separately arranged, a controller (7) is further arranged in the heating cavity (11), and the controller (7) can control the water in the water storage cavity (111) to flow into the storage cavity (112).

9. The self-heating container according to claim 8, wherein a water injection port (113) is formed in the upper end of the water storage cavity (111), a sealing plug (114) is connected to the water injection port (113), a water outlet pipe (115) communicating the object storage cavity (112) with the water storage cavity (111) is formed in the side wall of the water storage cavity (111), the controller (7) is arranged in the water storage cavity (111), the controller (7) comprises a piston head (71), a piston rod (72) and a piston handle (73), the piston head (71) is connected with the water storage cavity (111) in a sliding fit mode, a return spring (74) is sleeved on the piston rod (72), and the return spring (74) always has a tendency of enabling the piston head (71) to move away from the water storage cavity (111).

10. A self-heating container according to claim 9, wherein a limit step (1111) is arranged in the water storage cavity (111), a release-proof member (8) is connected to the open end of the water storage cavity (111), one end part of the return spring (74) close to the piston head (71) abuts against the limit step (1111), and one end part of the return spring (74) close to the piston handle (73) abuts against the release-proof member (8).

11. A self-heating container according to claim 9, wherein a leakproof soup tray (9) is provided on the side of the sealing plug (114) close to the waterproof breathable membrane (3), the leakproof soup tray (9) and the sealing plug (114) being of an integral structure.

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