CN111380084A

CN111380084A - Microwave oven for heating double-layer lunch box

Info

Publication number: CN111380084A
Application number: CN202010144780.2A
Authority: CN
Inventors: 朱铧丞; 杨阳; 黄卡玛
Original assignee: Sichuan University
Current assignee: Sichuan University
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2020-07-07

Abstract

The invention discloses a microwave oven for heating double-layer boxed meals, which comprises a microwave oven body, an arc-shaped energy focusing part and a pair of microwave feed ports, wherein the arc-shaped energy focusing part is arranged at the bottom of the microwave oven body, the pair of microwave feed ports are arranged on the outer walls of two opposite side surfaces of the microwave oven body, the pair of microwave feed ports are orthogonally arranged, two side surfaces on the same side of the arc-shaped energy focusing part and the microwave feed ports are of arc-shaped structures extending inwards, a support is arranged at the joint of the microwave oven body and the arc-shaped energy focusing part, a first accommodating cavity and a second accommodating cavity are sequentially arranged on the support from top to bottom, the first accommodating cavity is used for accommodating dishes in a lunch box, and the second accommodating cavity is used for accommodating boxed meals. The invention can solve the problem that the layered box lunch rice is not easy to heat, so that the rice and dishes can be well heated.

Description

Microwave oven for heating double-layer lunch box

Technical Field

The invention relates to the technical field of microwave ovens, in particular to a microwave oven for heating double-layer boxed lunch.

Background

With the continuous development of science and technology, microwave energy is used as a novel efficient clean energy source to be applied more and more in various fields such as food processing, chemical engineering, medicines and the like. Compared with the traditional heating method, the microwave heating has the characteristics of high efficiency, energy conservation, selective heating, cleanness, no pollution and the like. Microwave heating is widely used in many fields today. However, the microwave heating process also has a series of problems of poor microwave heating uniformity, low heating efficiency, easy occurrence of 'hot spots' and runaway, and the like, and the problems greatly restrict the large-scale application of microwave energy in industry. The microwave heating process is that the heated object acts on a high-frequency electromagnetic field to absorb microwave energy and convert the microwave energy into heat energy, and the microwave can penetrate through the inside of the substance to be heated, so that the effect of heating inside and outside simultaneously is achieved. However, due to the uneven distribution of the electromagnetic field in the cavity, the microwave heating has serious uneven heating characteristics. Therefore, it is important to improve the uniformity of heating and the heating efficiency.

The conventional microwave oven has the problems of poor heating uniformity, easy restriction of heating efficiency on the object to be heated, difficult heating of partial substances and the like. When the microwave oven heats the box lunch, the heated box lunch can have serious temperature unevenness because of the uneven distribution of the electromagnetic field in the microwave reaction cavity and the different microwave absorption capability of the heated substance. Particularly, in heating a box lunch with layered dishes, since the microwave loss of the dishes is larger than that of the rice, it is often the case that the dishes are hot but the rice is not hot when heating. As for the method for improving the heating uniformity, a mode stirrer is added, or a turntable and the like are added to improve the heating uniformity, and the method needs to add an additional motor, has a complex structure and is higher in cost.

Disclosure of Invention

In order to solve the problems in the prior art, the invention aims to provide the microwave oven for heating the double-layer box lunch, and the microwave oven can solve the problem that rice in the layered box lunch is difficult to heat, so that the rice and dishes can be well heated.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a microwave oven for heating of double-deck box lunch, its characterized in that presents the mouth including microwave oven body, arc energy focusing portion and a pair of microwave, arc energy focusing portion locates the bottom of microwave oven body, it is a pair of the mouth is presented to the microwave locate the outer wall of two relative sides on the microwave oven body, and it is a pair of mouth quadrature setting is presented to the microwave, on the arc energy focusing portion with the microwave presents the mouth for the arc structure of inside extension with two sides of one side, the microwave oven body is equipped with the support with the junction of arc energy focusing portion, from the top down is equipped with in proper order on the support and firstly holds the chamber and the chamber is held to the second, first chamber that holds is used for the lunch-box to hold the dish, the second holds the chamber and is used for holding box rice.

As a preferred embodiment, the stent is made of polytetrafluoroethylene.

The invention has the beneficial effects that:

the invention adopts a mode that two microwave feed ports are orthogonal to each other to feed energy, and realizes the high-efficiency utilization of electromagnetic wave energy through the two orthogonal microwave feed ports, the layered box lunch is placed in the center of a cavity of a microwave oven, the bottom of a microwave oven body is provided with an arc-shaped energy focusing part which is beneficial to focusing the microwave energy on the lower layer of the box lunch, the microwave energy is generated by a magnetron and is fed into the microwave oven through the orthogonal microwave feed ports, the box lunch in the middle of the microwave oven is of an upper and lower layered structure, the upper layer is a first containing cavity for containing box lunch, the lower layer is a second containing cavity for containing box lunch, the box lunch is in a refrigerated state, the microwave absorbing capacity of the lunch is greater than that of the lunch, the box lunch is placed on a polytetrafluoroethylene bracket, the arc-shaped energy focusing part at the bottom of the microwave oven concentrates the electromagnetic waves on the position of the rice in the cavity, can heat rice with weak microwave absorbing ability, and has high heating uniformity.

Drawings

FIG. 1 is a schematic structural diagram of a microwave oven employing orthogonal energy feed and arc-shaped energy focusing units according to an embodiment of the present invention;

fig. 2 is a schematic view of the temperature distribution in the microwave oven according to the embodiment of the present invention.

Reference numerals:

1. microwave oven body, 2, arc energy focusing part, 3, microwave feed mouth, 4, support, 5, first chamber that holds, 6, second hold the chamber.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Examples

As shown in fig. 1, a microwave oven for heating double-deck boxed meal, includes microwave oven body 1, arc energy focusing part 2 and a pair of microwave feeder port 3, arc energy focusing part 2 is located the bottom of microwave oven body 1, and is a pair of microwave feeder port 3 is located the outer wall of two relative sides on microwave oven body 1, and is a pair of microwave feeder port 3 quadrature sets up, on the arc energy focusing part 2 with two sides that microwave feeder port 3 was with one side are the arc structure of inside extension, microwave oven body 1 is equipped with the support 4 of being made by gathering tetrafluoro with arc energy focusing part 2's junction, from the top down is equipped with first chamber 5 and the second of holding on the support 4 in proper order and holds chamber 6, first chamber 5 that holds is used for holding the box meal, the second holds chamber 6 and is used for holding box meal.

In the embodiment, energy is fed in a mode that two microwave feed ports 3 are orthogonal to each other, efficient utilization of electromagnetic wave energy is achieved through the two orthogonal microwave feed ports 3, the layered lunch box is placed in the center of the cavity, and the arc-shaped energy focusing part 2 is arranged at the bottom of the microwave oven and is beneficial to focusing the microwave energy on the lower layer of the lunch box. Microwave energy is generated by a magnetron and is fed into a microwave oven through an orthogonal microwave feed port 3, a box lunch in the middle of a microwave oven body 1 is of an upper-lower layered structure, the upper layer is a first containing cavity 5 for containing box lunch, the lower layer is a second containing cavity 6 for containing box lunch rice, the box lunch is in a cold storage state, the microwave absorption capacity of the dish is greater than that of the lunch, the box lunch is placed on a support 4 made of polytetrafluoroethylene, and an arc-shaped energy focusing part 2 of the lower layer concentrates electromagnetic waves at the position of the rice in the microwave oven cavity.

As shown in fig. 2, fig. 2 is a schematic view of a temperature distribution in a microwave oven. The tan delta for vegetables is 0.271, and the tan delta for rice is 0.096; the power of the two microwave feeds 3 is 1kW, and the heating time is 50S. The reflection coefficients of both microwave feeds 3 are less than-10 dB by simulation. It can be seen that the temperature rise of the rice and the dish after heating for 50S is objective. The rice, which has weak microwave absorbing ability, also reaches a very high temperature. Therefore, the rice can be ensured to better absorb microwave energy, the problem of poor microwave absorption capability of the rice is well solved, and the rice and dishes can be well heated.

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims

1. The utility model provides a microwave oven for heating of double-deck box lunch, its characterized in that presents the mouth including microwave oven body, arc energy focusing portion and a pair of microwave, arc energy focusing portion locates the bottom of microwave oven body, it is a pair of the mouth is presented to the microwave locate the outer wall of two relative sides on the microwave oven body, and it is a pair of mouth quadrature setting is presented to the microwave, on the arc energy focusing portion with the microwave presents the mouth for the arc structure of inside extension with two sides of one side, the microwave oven body is equipped with the support with the junction of arc energy focusing portion, from the top down is equipped with in proper order on the support and firstly holds the chamber and the chamber is held to the second, first chamber that holds is used for the lunch-box to hold the dish, the second holds the chamber and is used for holding box rice.

2. The microwave oven for double-decker box lunch heating as claimed in claim 1, wherein said supporter is made of teflon.