WO2020010758A1 - Microwave oven, instant food lunch box and method for heating food in lunch box - Google Patents

Abstract

An instant food lunch box, comprising a lunch box cover (3) and a lunch box body (2). The lunch box cover (3) covers the lunch box body (2) to form an internal space of the lunch box to be heated by microwaves, and a food accommodating portion (21) is arranged in the internal space of the lunch box. A first water storage portion (22) suited to holding water is provided in the internal space of the lunch box, and the first water storage portion (22) is isolated from the food accommodating portion (21). At least one side of the first water storage portion (22) is in contact with an external ultrasonic vibration device (13), and the ultrasonic vibration device (13) shakes the water in the first water storage portion (22) by means of ultrasonic waves so as to generate water mist particles. The water mist particles are suited to entering the food accommodating portion (21) and adhering to the surface of the food. Using the present lunch box to heat food by microwaves may wet the surface of the food without needing to open the lunch box. Also disclosed are a microwave oven (1) and a method for heating the food in the lunch box.

Description

Microwave oven, instant meal box and method for heating meal box food Technical field

The invention relates to the technical field of catering, in particular to a microwave oven, a fast-food lunch box and a method for heating food in a lunch box.

Background technique

In daily life, modern people ’s eating habits and methods are gradually changing. From the traditional walk into restaurants for dining, to the fast-food field that can be delivered by takeaways. With the fast-paced lifestyle, users are not influencing Under the premise of food quality, food needs to be obtained faster and more efficiently. However, the current rapid heating methods, such as microwave heating, will cause the water in the food to evaporate and lose during the rapid heating process, which will cause burnt on the food surface and affect User taste

For "a cooking lunch box" disclosed in Chinese patent CN201620666082.8, the liquid water in the lunch box is heated by a microwave oven, and the liquid water is converted into water vapor, thereby keeping the food moist. In large-scale commercial heating of food, because the heating time is short, generally 1-2 minutes, water vapor cannot enter the food in a short period of time, neither fast heating effect nor good wetting effect can be achieved. At present, there are no products and methods on the market that can effectively solve the problem of rapidly heating food and keeping the food surface moist.

Summary of the invention

In order to effectively solve the above problems, the present invention provides a microwave oven, a fast-food lunch box, and a method for heating a lunch box food.

The specific technical solution of the present invention is as follows: A microwave oven, the microwave oven includes:

An outer shell, the outer shell being recessed inward to form a receiving cavity for food to be heated;

A microwave source, and a microwave source for microwave-heating food is arranged in the containing cavity;

An ultrasonic vibration device provided on the inner wall of the containing cavity and providing an ultrasonic vibration energy source to a heating medium in the direction of ultrasonic vibration to atomize the heating medium into water mist particles attached to the surface of the food;

A control unit, which is connected to a microwave source and an ultrasonic vibration device to control and activate different heating modes according to food types.

Further, the ultrasonic vibration device is disposed on a bottom surface of the accommodation cavity, and the microwave source is disposed on an inner peripheral wall of the accommodation cavity.

A fast-food lunch box is applied to the microwave oven. The fast-food lunch box includes a lunch box body and a meal cover, and one side of the lunch box body faces inwardly to form a food container containing food. Home department,

When the lunch box is placed in the microwave oven in a heating state, the meal box body is in contact with the ultrasonic vibration device on a side, and a first water storage part is provided in a direction in which the ultrasonic vibration device emits an ultrasonic vibration energy source, and the first water storage A heating medium is contained in the portion, and the first water storage portion and the food containing portion communicate with each other, so that when receiving the ultrasonic vibration energy, the heating medium is converted into water mist particles and enters the food containing portion, Evenly adheres to the surface of food.

Further, the first water storage part and the food accommodating part communicate with each other by opening a ventilation part;

The first water storage portion is provided on a peripheral side of the food containing portion, or at a bottom surface position.

Further, a second water storage unit that is independently detachable is further provided on the peripheral side of the first water storage unit, and the second water storage unit is provided with a heating medium inside;

After the second water storage unit and the first water storage unit are assembled and fixed, when the lunch box is in a heated state, the heating medium receives microwave heating, flows from the second water storage unit, and enters the first water storage unit. , And then receive ultrasonic vibration atomization.

Further, a water permeable part is opened on the surface of the second water storage part, and the water permeable part and the heating medium are in contact with each other. After the first water storage part and the second water storage part are assembled and fixed, the first water storage part is fixed. A water inlet is provided at a position corresponding to the water permeable part of the second water storage part. During the microwave heating process, the heating medium passes through the water permeable part and the water inlet and enters the first water storage part after being heated.

Further, the water permeable portion is provided at a position of the second water storage portion and includes a bottom surface of the second water storage portion and a peripheral wall of the second water storage portion;

When the lunch box is at a normal temperature, the heating medium is in the second water storage part. When the lunch box is in the microwave heating state, part of the heating medium is vaporized, and the pressure of the second water storage part is increased, and the heating medium passes through the water permeable part in turn The water inlet flows into the first water storage unit;

The water permeable portion includes a microporous structure that seals a heating medium at normal temperature, or a closed member that can be opened under pressure.

A method for heating food in a lunch box, which is applied to the instant food box, wherein the method for heating includes the following steps:

Step 1: Prefabricated lunch box: inject liquid water into the first water storage section, put food into the food storage section in the lunch box, and a food cover seals the food storage section and the first water storage section;

Step 2 Atomization by ultrasonic vibration: Put the instant food box into the microwave oven, and the first water storage part directly or indirectly contacts the ultrasonic vibration device in the microwave oven to start the operation of the ultrasonic vibration device;

Step 3 moisten the food: the ultrasonic vibration device provides ultrasonic vibration waves to the liquid water in the first water storage unit to generate water mist particles, and the water mist particles enter the food receiving portion and adhere to the food surface;

Step 4: Microwave heating: After the water mist particles are attached to the surface of the food, the microwave oven activates the microwave source to emit microwaves to microwave the food.

Further, the liquid water in step 1 is put into the first water storage part in the form of ice cubes, and the meal box is stored frozen;

The step 2 further comprises: starting a microwave source of a microwave oven to emit microwaves, and the microwaves heat the food while heating the ice cubes, so that the ice cubes melt into water, and then receive ultrasonic vibration and atomization;

The heating method performs several cycles of steps 3 and 4 on the instant meal box.

Further, in step 1, the fast-food meal box further includes a separately detached second water storage part, liquid water is placed in the second water storage part, and canceled in the first water storage part Put liquid water in the process of prefabricated lunch box, the second water storage part and the first water storage part are assembled and fixed;

Adding a step of heating a second water storage unit before step 3, said heating said second water storage unit: activating a microwave source in a microwave oven to emit microwaves, said microwaves heating the food, and said second water storage unit Part of the water in the part is vaporized into water vapor, which causes part of the water in the second water storage part to enter the first water storage part.

Advantages of the present invention: Compared with the traditional microwave heating, the microwave oven, instant food box, and heating method of the present invention are applied. The method uses an ultrasonic vibration device to emit ultrasonic waves from the outside of the lunch box, and inside the lunch box. There are several advantages to generating water mist particles:

1. Water mist particles are generated by atomization, which consumes less energy and faster than water vapor generated by microwaves;

2. In the microwave process, the water mist particles can quickly enter the food surface, which greatly increases the wetness of the food surface. Even the dried food can quickly become wet. The test shows that the atomization time is about 15 seconds plus 30. Microwave time can make the food surface moist and soft, and wetting the food surface by water vapor method requires that the food be placed in a high-temperature water vapor environment for about 5-10 minutes. This method consumes less energy and is fast;

3.Using the ultrasonic vibration device to contact the lunch box to ultrasonically vibrate the water in the lunch box. As with microwave heating of food, there is no need to open the lunch box, which can effectively maintain the pre-packaged properties of the lunch box food. , Such as temporary sales points, or on the train, you can use this method to provide food heating services and sales, instead of traditional cooking and heating.

4. For noodles, dumplings, buns and other pasta products, usually after refrigerated or frozen for a period of time, the food surface will be dehydrated and dried. This heating method can flexibly adjust the degree of wetness of the food surface during microwave heating.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of an overall structure of a microwave oven according to a first embodiment of the present invention; FIG.

2 is a schematic diagram of the internal structure of the instant meal box according to the present invention;

3 is a schematic structural diagram of a fast-food meal box according to a second embodiment of the present invention;

4 is a schematic structural diagram of a fast-food meal box according to a third embodiment of the present invention;

5 is a schematic structural diagram of a fast-food meal box according to another embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an instant meal box according to another embodiment of the present invention.

detailed description

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

On the contrary, the invention covers any alternatives, modifications, equivalent methods, and schemes made on the spirit and scope of the invention as defined by the claims. Further, in order to give the public a better understanding of the present invention, in the following detailed description of the present invention, some specific details are described in detail. To those skilled in the art, the present invention can be fully understood without the description of these details.

As shown in FIG. 1 and FIG. 2, it is a schematic diagram of the overall structure of a microwave oven according to the present invention and a schematic diagram of the structure of a fast-food meal box. This embodiment provides a microwave oven 1 including an outer shell 10, a control unit 11, Microwave source 12, the outer shell 10 is a conventional microwave oven 1 outer shell, one side of the outer shell 10 is recessed inward to form a receiving cavity for receiving food or a lunch box, and the overall structure of the receiving cavity The shape includes, but is not limited to, a square cavity, a rectangular cavity, and an arc cavity;

A control section 11 is provided in the outer casing 10, and the ultrasonic vibration device 13 is provided on the bottom surface of the accommodating cavity. The control section 11 is connected to the microwave source 12 and the ultrasonic vibration device 13, respectively. A microwave source 12 is provided in the accommodating cavity for heating the accommodating cavity. The microwave source 12 and the arrangement of the microwave source 12 and the outer casing 10 are conventional settings in the art, and are not provided here. Make specific restrictions

The control unit 11 is connected to the microwave source 12 and the ultrasonic vibration device 13 respectively, so that the control unit 11 is a controller that controls various components to work together. The control unit 11 includes, but is not limited to, a single-chip microcomputer, or a microcomputer. processor;

In this embodiment, a fast-food lunch box is also provided. The fast-food lunch box includes a lunch box body 2, a lunch cover 3, and the lunch cover 3 covers the lunch box body 2 to form a microwave to be heated. An inner space of a lunch box, a food accommodating portion 21 adapted to receive food is provided in the inner space of the lunch box body 2;

In another embodiment, the ultrasonic vibration device 13 protrudes from the bottom surface of the accommodating cavity, and legs are provided around the bottom surface of the lunch box body 2. During ultrasonic atomization, meals are circulated through the legs. The box support is placed above the ultrasonic vibration device 13 so that the ultrasonic vibration device 13 and the first water storage portion 22 closely adhere to each other, so as to better achieve the ultrasonic vibration atomization effect of the ultrasonic vibration device.

In another embodiment, an atomizing device is provided on the outside of the accommodating cavity, and the atomizing device directly conveys the water mist particles through a duct, and the duct can be inserted into the food accommodating portion 21, And wet the food with water mist;

In another embodiment, an atomizing device is provided on the inner peripheral wall of the containing cavity, a water tank is arranged above the microwave oven 1, the atomizing device is connected to the water tank, and the atomizing device sprays water mist particles After reaching the food surface, the microwave oven 1 is further subjected to microwave heating, so as to achieve atomization and moistening of the outer surface of the food, followed by microwave heating;

In the above embodiments, the atomization device may be a conventional device in the art.

The ultrasonic vibration device 13 includes an electric ultrasonic generator made using the principle of electromagnetic induction and electromagnetic action, or the ultrasonic vibration device 13 is made using the electrostrictive effect of a piezoelectric crystal and the magnetostrictive effect of a ferromagnetic substance. The electro-acoustic transducer has an ultrasonic vibration frequency between 15 KHz and 2.4 MHz. After a large number of experiments, it is proved that the contact surface between the first water storage unit 22 and the ultrasonic vibration device 13 is a thin surface structure, and the first When the thickness of the bottom surface of the water storage unit 22 is 0.5-1 mm and the contact area is sufficient to transmit ultrasonic vibration energy, the ultrasonic vibration device 13 provides ultrasonic cavitation to the liquid water at the bottom of the water storage unit, so that the liquid water receives ultrasonic waves. Energy of shock wave, atomized into water mist particles;

In this embodiment, a first water storage portion 22 adapted to receive liquid water is further provided in the interior space of the meal box body 2, and the first water storage portion 22 is provided below the food storage portion 21, And the first water storage portion 22 and the food containing portion 21 are isolated from each other;

The first water storage portion 22 is a concave water storage space. A ventilation portion 23 is provided on a peripheral wall separated from the food storage portion 21 and the first water storage portion 22, and the ventilation portion 23 is located at The liquid water inside the first water storage part 22 and the food inside the food storage part 21 are above. The ventilation part 23 is a through-hole structure. Before the instant food box is heated by the microwave, the first water storage part The liquid water in 22 receives the ultrasonic vibration of the ultrasonic vibration device 13 and is atomized into water mist particles, and enters the food accommodating portion 21 through the air-permeable portion 23 and is adhered to the surface of the food. Then the control portion 11 controls The microwave source 12 cooperates with microwave heating of the food, while rapidly heating the food, moistening the surface of the food.

Further, a first water injection port is provided on the top surface of the first water storage portion 22, and liquid liquid may be injected into the first water storage portion 22 when heating the fast food meal box, or in the fast food meal box. After injecting liquid water, freeze it into ice cubes, and then freeze and distribute the entire lunch box to avoid contact between liquid water and food during the distribution process;

In another embodiment, the top surface of the first water storage portion 22 is an open structure, which is convenient for injecting liquid water into the first water storage portion 22. The opening surface is sealed by the meal cover 3 at the same time;

In another embodiment, the ultrasonic vibration device 13 is disposed on the bottom surface of the accommodating cavity, and the ultrasonic vibration device 13 is slightly lower than the bottom surface of the accommodating cavity, and the bottom surface of the instant meal box has A convex arc surface protruding outward, the circular arc surface and the upper surface of the ultrasonic vibration device 13 are mutually adapted. During the ultrasonic vibration, the fast food meal box and the ultrasonic vibration device 13 pass through the circular arc surface. Positioned to each other, the ultrasonic vibration device 13 accurately performs ultrasonic vibration on the liquid water in the first water storage unit 22, thereby rapidly generating water mist particles, and the water mist particles are evenly attached to the food surface.

Because the ultrasonic frequency is high, it cannot conduct well in the air. If there is air between the vibration device and the surface of the first water storage unit, the ultrasonic wave will return as soon as it encounters the air. A layer of couplant is first applied to the surface of the ultrasonic vibration device 13 to eliminate air between the ultrasonic vibration device and the first water storage portion.

There are many kinds of coupling agents, the most common of which is water, and some coupling agents are made of motor oil, transformer oil, grease, glycerin, water glass (sodium silicate Na ₂ SiO ₃ ) or industrial glue, chemical paste.

As shown in FIG. 3, in the second embodiment of the present invention, the overall structure of the second embodiment is the same as the first embodiment, except that the first water storage unit of the second embodiment is different. 22 is disposed on a peripheral side wall of the food containing portion 21, an opening surface of the first water storage portion 22 and an opening surface of the food containing portion 21 are on a same horizontal plane, and the food containing portion 21 and the food containing portion 21 are A ventilation portion 23 is provided on the peripheral wall separated by the first water storage portion 22, and the ventilation portion 23 is located above the liquid water in the first water storage portion 22 and the food in the food storage portion 21, and is located in the instant food box. During the ultrasonic vibration, the bottom surface of the first water storage portion 22 and the ultrasonic vibration device 13 are arranged corresponding to each other. The liquid water in the first water storage portion 22 receives the ultrasonic vibration of the ultrasonic vibration device 13 and is atomized into a water mist. The particles enter the food accommodating portion 21 through the air-permeable portion 23 and are adhered to the surface of the food.

As shown in FIG. 4, in a third embodiment of the present invention, the third embodiment is mostly the same as the second embodiment, except that the internal space of the instant meal box further includes There is a second detachable water storage unit 24, and the first water storage unit 22 is provided on the peripheral side of the food storage unit 21, and the first water storage unit 22 is integrated with the food storage unit 21. A molding structure, which can be fixedly assembled with the second water storage portion 24 on the peripheral side of the first water storage portion 22;

A communication portion 25 for cooperating and fixing the second water storage portion 24 is extended from the bottom surface of the first water storage portion 22. A water inlet 26 is opened on the top surface of the communication portion 25. The internal spaces of the first water storage unit 22 are communicated with each other. The top surface of the second water storage unit 24 is provided with a second water injection port 27. When assembling a fast food meal box, liquid water is pre-filled to seal the second water storage unit. Water injection port 27, the second water storage unit 24 is assembled with the lunch box body 2 and the first water storage unit 22 and distributed to prevent liquid water from contacting food;

The bottom surface of the second water storage portion 24 is provided with one or more micro-holes 29, and the diameter of the micro-holes 29 is a through-hole of 0.05-0.2 mm. When the instant food box is distributed, The second water storage portion 24 is fixed on the peripheral side of the first water storage portion 22, and the micro-holes 29 and the water inlet 26 are arranged corresponding to each other. The water in the second water storage portion 24 cannot flow out. When ultrasonic atomization is required, microwave heating is performed first. The air pressure in the second water storage unit 24 increases, and liquid water is ejected from the micropores 29, flows into the first water storage unit 22, and receives Ultrasonic vibration atomization.

In other embodiments, the pore size range of the micropores 29 is only in a normal temperature state, and liquid water is sealed in the second water storage portion 24. In a microwave heating state, the heating medium can enter through the micropores 29 The effect of the first water storage unit 22 shall prevail, which is not specifically limited herein;

As shown in FIG. 5, in another embodiment, the structures of the second water injection port 27 and the water inlet 26 are adapted to each other, and the second water storage unit 24 is pre-filled with liquid through the second water injection port 27. Water, and after the water injection is completed, the second water injection port 27 is sealed, and the second water injection port 27 is provided with a sealing structure that is opened and closed according to the internal air pressure, the sealing structure includes a cross valve body, and the cross valve body is a piece An oblate rubber body with a “ten” -shaped scratch cut through the middle, the cross valve body is a conventional device in the art, and is not specifically limited herein;

Further, the sealing structure includes, but is not limited to, a cross rubber valve, a rubber stopper, and a sticker. In this embodiment, when the instant food box is distributed, the second water storage part 24 is assembled upside down to the first A water storage part 22 is provided on the outer peripheral wall, and the second water injection port 27 and the water inlet 26 are closely fitted to each other in correspondence with each other. Water will not flow out of the second water storage part. Before the transformation, microwave heating is performed. Part of the water in the second water storage unit 24 absorbs microwave energy and is converted into water vapor. At this time, the air pressure in the second water storage unit 24 increases, and the second water storage unit 24 increases the pressure. Part of the water in the water storage unit 24 is squeezed, and the liquid water enters the first water storage unit 22 through the second water injection port 27 and the water inlet 26 in sequence. The liquid water is then received in the first water storage unit 22 The ultrasonic vibration performed by the ultrasonic vibration device 13 is atomized into water mist particles, and enters the food containing portion 21 through the air-permeable portion 23.

In this embodiment, the second water storage portion 24 and the first water storage portion 22 are fixedly assembled in such a manner that a card slot 28 extends from a peripheral side of the communication portion 25, and the card slot 28 and the The peripheral wall of the top surface of the second water storage portion 24 can be fixed to each other at a limited position, and the second water storage portion 24 is fixed upside down at the top surface of the communication portion 25. The fast food lunch box uses an independent and detachable second water storage unit 24, which is more suitable for assembly line production during assembly and production processes, and the second water storage unit 24 can be independently produced. During the assembly process, the second water storage unit is directly The portion 24 is assembled with the communication portion 25, so that it is not necessary to directly add water to the lunch box.

As shown in FIG. 6, in another embodiment, a water inlet 26 is opened on an outer peripheral wall of the first water storage portion 22 facing the second water storage portion 24. The side of the first water storage portion 22 that is in contact with each other is provided with a water outlet 30 at a position corresponding to the water inlet 26, and a second water injection port 27 is opened on the top surface of the second water storage portion 24;

The second water storage unit 24 is pre-filled with liquid water through the second water injection port 27, and after the water injection is completed, the second water injection port 27 is sealed, and the water outlet 30 is a sealed structure with one or more micropores. In this embodiment, the water outlet 30 is located below the liquid surface of the liquid water, and the water outlet 30 is such that water cannot flow out of the water outlet 30 at normal temperature; when the instant food box is distributed, The second water storage portion 24 is fixedly mounted on the outer peripheral wall of the first water storage portion 22, and the water outlet 30 and the water inlet 26 are closely fitted to each other in correspondence with each other, and ultrasonic vibration atomization is required when needed At this time, microwave heating is performed first. Part of the water in the second water storage unit 24 absorbs microwave energy and is converted into water vapor. At this time, the air pressure in the second water storage unit 24 increases, and the second water storage unit 24 Part of the water in the water part 24 is squeezed, liquid water is sprayed from the water outlet 30 to the water inlet 26 and enters the first water storage part 22, and the liquid water receives the ultrasonic wave in the first water storage part 22 The ultrasonic vibration performed by the vibration device 13 is atomized into water mist particles and passes through the air-permeable portion 2 3 Perform the food storage section 21.

In this embodiment, the second water storage portion 24 and the first water storage portion 22 are fixedly assembled by extending a card slot 28 on the bottom surface of the instant meal box, and the card slot 28 and the first The outer peripheral wall of the bottom surface of the second water storage portion 24 can be fixed to each other at a limited position, and the second water storage portion 24 is fixed to the outer wall of the first water storage portion 22. In other embodiments, the second water storage portion 24 The manner of fixing and assembling the part 24 and the first water storage part 22 is not specifically limited.

In other embodiments, the second water storage unit 24 is a closed plastic bag containing water, which expands and ruptures after heating, and the water flows out of it and flows into the first water storage unit. The specific fixing and assembling method of the second water storage unit 24 is not specifically limited herein.

In another embodiment, the first water storage portion 22 is disposed at the center of the bottom surface of the food containing portion 21. The first water storage portion 22 has a cylindrical structure, and the contents of the first water storage portion 22 The top surface is filled with liquid water, and a sealing cover is provided. A vent portion 23 is provided on an outer peripheral wall of the first water storage portion 22, and pre-cooked or semi-cooked noodles are placed around the first water storage portion 22, During the ultrasonic vibration atomization process, the bottom surface of the first water storage portion 22 receives the ultrasonic vibration wave of the ultrasonic vibration device 13 and conducts the water mist into the food containing portion 21 through the air-permeable portion 23, and is opposite to The strips were atomized and moistened.

In a fourth embodiment of the present invention, the fourth embodiment provides a method for heating meal box food. The method for heating meal box food is applied to the microwave oven 1 and the instant meal box of the above embodiment. The heating method includes the following steps:

Step 1 Prefabricated lunch box: inject liquid water into the first water storage section 22, put food into the food storage section 21 in the lunch box, and a meal cover 3 seals the food storage section 21 and the first Water storage department 22;

Step 2 Atomization by ultrasonic vibration: Put the instant food box into the microwave oven 1, and the first water storage unit 22 directly or indirectly contacts the ultrasonic vibration device 13 in the microwave oven 1, and activate the ultrasonic vibration device 13 jobs;

Step 3 Wet food: The ultrasonic vibration device 13 provides ultrasonic vibration waves to the liquid water in the first water storage portion 22 to generate water mist particles, and the water mist particles enter the food storage portion 21 and are attached to Food surface

Step 4: Microwave heating: After the water mist particles are attached to the surface of the food, the microwave oven 1 activates the microwave source 12 to emit microwaves to microwave the food.

Further, in the heating method, the steps 3 and 4 may be performed multiple cycles to ensure that the food container 21 is always filled with water mist particles during the microwave heating process.

Further, in the heating method, the step 1 further includes: placing water in the form of ice cubes into the first water storage section 22 in the lunch box, or placing the first water storage section 22 in the lunch box. Frozen water in 22;

Before step 3, the method further includes: starting the microwave source 12 in the microwave oven 1 to emit microwaves, and melting the ice in the first water storage unit 22 into water.

For frozen foods, such as quick-frozen dumplings, water can be directly stored in the form of ice cubes in the first water storage section 22. During transportation and distribution, the ice cubes will not contact the food in the food storage section 21. During the heating process, the food is thawed first, and the ice cubes are thawed at the same time. The characteristics of the frozen food are fully utilized, so that the food and ice cubes are thawed at the same time, and the molten liquid water is atomized by ultrasonic vibration to ensure that the surface of the food is atomized. The water is attached, and then microwave heating is performed to make the lunch box suitable for the distribution of frozen food;

Further, in step 1, the injection of liquid water into the first water storage unit 22 is cancelled, and the liquid water is injected into the second water storage unit 24 that can be independently assembled, and the food is placed in the food container in the lunch box. The storage portion 21 and the meal cover 3 seal the food storage portion 21 and the first water storage portion 22, and fix the first water storage portion 22 and the second water storage portion 24 to each other. During the food distribution process, avoid liquid Water and food are in contact with each other. Before the vibration and atomization, the second water storage part is microwave-heated, and the liquid water in the second water storage part 24 enters the first water storage part 22, and then the ultrasonic vibration atomization is performed;

Add another step of heating the second water storage unit 24 before step 3, said heating the second water storage unit 24: starting the microwave source 12 in the microwave oven 1 to emit microwaves, said microwave heating the second water storage unit 24 The water generates water vapor, which causes part of the water in the second water storage portion 24 to enter the first water storage portion 22.

For refrigerated foods, such as buns and noodles, it is necessary to add a sealing device for the first water storage section 22 or a second water storage section 24 in the lunch box structure to avoid direct contact between water and food during the distribution process, so that Fast food lunch boxes are suitable for large-scale take-out lunch boxes.

By applying the microwave oven 1, instant food box, and heating method described in the present invention, compared with the traditional microwave heating, this method generates water mist particles through the ultrasonic vibration of the ultrasonic vibration device 13, which has the following advantages:

1. Water mist particles are generated by atomization, which consumes less energy and faster than water vapor generated by microwaves;

2. In the microwave process, the water mist particles can quickly enter the food surface, which greatly increases the wetness of the food surface. Even the dried food can quickly become wet. The test shows that the atomization time is about 15 seconds plus 30. Microwave time can make the food surface moist and soft, and the surface of the food is moistened by water vapor. If you want to achieve the same effect, you need to put the food in a high-temperature water vapor environment for about 5-10 minutes. This method consumes less energy and is fast;

3.Using the ultrasonic vibration device 13 to contact the water in the lunch box to ultrasonically shake the water in the lunch box. As with microwave heating of food, there is no need to open the lunch box, which can effectively maintain the pre-packaged properties of the lunch box food. Places, such as temporary points of sale, that provide food heating services and sales as an alternative to traditional cooking heating;

4. For pasta products such as noodles, dumplings, buns, etc., the food surface will usually be dehydrated and dried after being refrigerated or frozen for a period of time. This heating method can also flexibly and controllably adjust the wetness of the food surface.

For those of ordinary skill in the art, according to the teachings of the present invention, without departing from the principle and spirit of the present invention, changes, modifications, replacements and deformations made to the embodiments still fall into the protection scope of the present invention. within.

Claims (10)

A microwave oven, characterized in that the microwave oven includes: An outer shell, the outer shell being recessed inward to form a receiving cavity for food to be heated; A microwave source, and a microwave source for microwave-heating food is arranged in the containing cavity; An ultrasonic vibration device provided on the inner wall of the containing cavity and providing an ultrasonic vibration energy source to a heating medium in the direction of ultrasonic vibration to atomize the heating medium into water mist particles attached to the surface of the food; A control unit, which is connected to a microwave source and an ultrasonic vibration device to control and activate different heating modes according to food types. The microwave oven according to claim 1, wherein the ultrasonic vibration device is disposed on a bottom surface of the accommodation cavity, and the microwave source is disposed on an inner peripheral wall of the accommodation cavity. A fast-food lunch box, the fast-food lunch box using any one of claims 1-2, the fast-food lunch box includes a lunch box body and a lid, and one side of the lunch box body faces inward The depression forms a food accommodating portion for accommodating food, and is characterized in that: When a lunch box is placed in the microwave oven, a side of the lunch box body that is in contact with the ultrasonic vibration device is provided with a first water storage portion in a direction in which the ultrasonic vibration device emits an ultrasonic vibration energy source, and the contents of the first water storage portion A heating medium is received, and the first water storage portion and the food containing portion communicate with each other, so that when the heating medium receives ultrasonic vibration energy, it is converted into water mist particles, enters the food containing portion, and is attached to Food surface. The fast-food meal box according to claim 3, wherein the first water storage portion and the food accommodating portion communicate with each other by opening a breathable portion; The first water storage portion is disposed on a peripheral side of the food containing portion or at a bottom surface position. The fast-food lunch box according to claim 3, wherein a second water storage unit that is independently detachable is provided on the peripheral side of the first water storage unit, and the second water storage unit is provided with heating content medium, After the second water storage unit and the first water storage unit are assembled and fixed, the heating medium receives microwave heating, flows out from the second water storage unit, enters the first water storage unit, and receives ultrasonic vibration and atomization. The fast-food lunch box according to claim 5, wherein a water-permeable portion is provided on the surface of the second water storage portion, and the water-permeable portion and the heating medium are in contact with each other, and the first water storage portion and the first water storage portion are in contact with each other. After the two water storage sections are assembled and fixed, a water inlet is opened at a position corresponding to the water permeable section of the second water storage section. In the microwave heating process, the heating medium passes through the water permeable section and the water after being heated. The water inlet enters the first water storage part. The fast-food meal box according to claim 6, wherein the water permeable portion is provided at a position of the second water storage portion and includes a bottom surface of the second water storage portion and a peripheral wall of the second water storage portion; When the lunch box is at a normal temperature, the heating medium is in the second water storage part. When the lunch box is in the microwave heating state, part of the heating medium is vaporized, and the pressure of the second water storage part is increased, and the heating medium passes through the water permeable part in turn. The water inlet flows into the first water storage unit; The water permeable portion includes a microporous structure that seals a heating medium at normal temperature, or a closed member that opens under pressure. A method for heating food in a lunch box, the heating method being applied to any one of claims 4-7, characterized in that the method for heating includes the following steps: Step 1: Prefabricated lunch box: inject liquid water into the first water storage section, put food into the food storage section in the lunch box, and a food cover seals the food storage section and the first water storage section; Step 2 Atomization by ultrasonic vibration: Put the instant food box into the microwave oven, and the first water storage part directly or indirectly contacts the ultrasonic vibration device in the microwave oven to start the operation of the ultrasonic vibration device; Step 3 moisten the food: the ultrasonic vibration device provides ultrasonic vibration waves to the liquid water in the first water storage unit to generate water mist particles, and the water mist particles enter the food receiving portion and adhere to the food surface; Step 4: Microwave heating: After the water mist particles are attached to the surface of the food, the microwave oven activates the microwave source to emit microwaves to microwave the food. The method for heating a meal box food according to claim 8, wherein the liquid water in the step 1 is put into the first water storage part in the form of ice cubes, and the meal box is stored frozen; The step 2 further comprises: starting a microwave source of a microwave oven to emit microwaves, and heating the ice cubes by the microwaves, so that the ice cubes are melted into water, and then subjected to ultrasonic vibration and atomization; The heating method performs several cycles of steps 3 and 4 on the instant meal box. The method for heating a meal box food according to claim 8, characterized in that in step 1, the instant meal box further comprises a second water storage section which is independently detachable, and in the second water storage section Liquid water is put in the liquid storage tank, and liquid water is not put in the first water storage unit. During the process of prefabricated meal box, the second water storage unit and the first water storage unit are assembled and fixed; A step of heating a second water storage unit is added before the step 3, the heating the second water storage unit: activating a microwave source in a microwave oven to emit microwaves, and the microwave heats a part of the water in the second water storage unit It is vaporized into water vapor, which allows part of the water in the second water storage portion to enter the first water storage portion.

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