CN110753413A

CN110753413A - Enclosed door, microwave oven, oven and dryer

Info

Publication number: CN110753413A
Application number: CN201810817771.8A
Authority: CN
Inventors: 张力潇; 俞国新; 劳春峰; 贾晓芸
Original assignee: Qingdao Haier Smart Technology R&D Co Ltd
Current assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Priority date: 2018-07-24
Filing date: 2018-07-24
Publication date: 2020-02-04
Anticipated expiration: 2038-07-24
Also published as: CN110753413B

Abstract

The invention discloses a closed door, which is used for a microwave and radio frequency heating device and comprises: a doorframe frame and a choke structure; further comprising: a dielectric disposed between the door frame bezel and the choke structure; the choke structure includes: the first choke plate and the second choke plate are matched in an L shape; the first choke plate extends to the microwave and radio frequency heating device accommodating cavity along the edge of the doorframe frame and perpendicular to the doorframe frame; the second choke plate extends perpendicularly to the first choke plate along a free end of the first choke plate toward a center of the doorframe side frame. The closed door provided by the invention has the advantages that the volume of the choking structure is reduced, the volume of the closed door of the microwave and radio frequency heating device is further reduced, the manufacturing cost is reduced, and the practicability is improved. The invention discloses a microwave oven, an oven and a dryer.

Description

Enclosed door, microwave oven, oven and dryer

Technical Field

The invention relates to the technical field of microwave and radio frequency heating, in particular to a sealing door, a microwave oven, an oven and a dryer.

Background

Microwave and radio frequency heating are based on the characteristics of uniform heating, high speed, small heat loss, convenient operation and the like, and the application of microwave and radio frequency heating technology is more and more common, for example: the radio frequency oven all-in-one machine, the microwave oven, the radio frequency oven, the unfreezing box, the clothes dryer, the dryer and the like are all applied to microwave and radio frequency heating. The microwave and radio frequency can be called as a double-edged sword, and when people enjoy the convenience brought to our lives by microwave and radio frequency heating every day, the device applying the microwave and radio frequency heating technology can emit microwaves which do certain harm to human bodies in work. The prior art discloses a plurality of microwave leakage prevention schemes, which are mainly used for forming a plurality of choke groove structures on the periphery of a door frame of a closed door of a microwave and radio frequency heating device to resist microwave flow.

Wherein, the thickness of the choke groove is in inverse proportion to the microwave radio frequency, and the lower the frequency, the thicker the choke groove width. For example: the choke groove width is 3cm under microwave oven frequency 2450MHz commonly used in current design, and when operating frequency dropped to if 915MHz or 433MHz, choke groove width can correspondingly increase to 8cm and 17cm, for realizing choke groove width can effectively restrain the microwave leakage, the corresponding structure size of door body also need to increase to cause product global design difficulty, the unusual thickness that the door body becomes is heavy, the door body thickening leads to available inner chamber to diminish. The manufacturing cost is increased, and meanwhile, the practicability of the microwave and radio frequency heating device is reduced.

Disclosure of Invention

The embodiment of the invention provides a sealing door, a microwave oven, an oven and a dryer, and aims to solve the problems that in the prior art, the sealing door is additionally provided with a leakage-proof device, the size is increased, the manufacturing cost is high, and the practicability is reduced. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.

According to a first aspect of embodiments of the present invention, there is provided a closed door for a microwave and radio frequency heating apparatus, comprising: a doorframe frame and a choke structure; it is characterized by also comprising: a dielectric disposed between the door frame bezel and the choke structure; the choke structure includes: the first choke plate and the second choke plate are matched in an L shape; the first choke plate extends to the microwave and radio frequency heating device accommodating cavity along the edge of the doorframe frame and perpendicular to the doorframe frame; the second choke plate extends perpendicularly to the first choke plate along a free end of the first choke plate toward a center of the doorframe side frame.

In some optional embodiments, the choke structure further comprises: a third choke plate; the third choke plate extends towards the doorframe side frame along the free end of the second choke plate perpendicular to the second choke plate; a choke cavity is formed among the doorframe side frame, the first choke plate, the second choke plate and the third choke plate.

In some alternative embodiments, the cross-sectional length of the second choke is proportional to the wavelength of microwaves within the microwave and radio frequency heating apparatus; the cross-sectional length of the second choke plate is inversely proportional to the dielectric permittivity.

In some alternative embodiments, the distance between the free end of the second choke and the doorframe side frame is proportional to the wavelength of the microwaves in the microwave and radio frequency heating device; the distance between the free end of the second choke plate and the doorframe rim is inversely proportional to the dielectric permittivity.

In some alternative embodiments, the dielectric is a solid dielectric, a gaseous dielectric, or a liquid dielectric.

In some alternative embodiments, the cross-sectional length of the second choke plate, i.e., the depth d of the choke structure, is determined according to the following equation (1):

wherein m is a choke structure depth coefficient; epsilon is the dielectric constant of the microwave and the microwave in the radio frequency heating device in vacuum; λ is the wavelength of the microwaves and the microwaves in the radio frequency heating device; a is a choke structure depth adjusting coefficient; .

In some alternative embodiments, the distance between the free end of the second choke plate and the doorframe side frame, i.e., the width g of the choke structure, is determined according to the following formula (2):

wherein n is a choke structure width coefficient; epsilon is the dielectric constant of the microwave and the microwave in the radio frequency heating device in vacuum; λ is the wavelength of the microwaves and the microwaves in the radio frequency heating device; b is a choke structure width adjustment coefficient.

In some optional embodiments, the choke structure is provided with a plurality of notches spaced apart along a length direction thereof, and the notches extend through the second choke plate, extend through the first choke plate, and end at a position adjacent to a connection between the first choke plate and the doorframe side frame, extend through the third choke plate, and end at a position adjacent to a connection between the third choke plate and the doorframe side frame.

In some alternative embodiments, the plurality of notches are uniformly formed on the first choke plate, the second choke plate, and the third choke plate.

According to a second aspect of embodiments of the present invention, there is provided a microwave oven including: a furnace body and any of the aforementioned closure doors; the front side of the furnace body is open; the closed door can be pivotally arranged on the front side of the furnace body to open or close the accommodating cavity of the furnace body.

According to a third aspect of embodiments of the present invention, there is provided an oven comprising: a cabinet and any of the aforementioned closure doors; the front side of the box body is open; the closed door is pivotally arranged on the front side of the box body to open or close the accommodating cavity of the box body.

According to a fourth aspect of embodiments of the present invention, there is provided a dryer including: a body and any of the aforementioned closure doors; the front side or the top side of the machine body is open; the closing door is pivotally arranged on the front side or the top side of the machine body to open or close the accommodating cavity of the machine body.

According to a fifth aspect of an embodiment of the present invention, there is provided a defrosting tank including: a cabinet and a closure door as provided in any of the preceding embodiments; the front side or the top side of the box body is open; the closed door is pivotally arranged on the front side or the top side of the box body so as to open or close the accommodating cavity of the box body.

The technical scheme provided by the embodiment of the invention has the following beneficial effects:

the present invention provides a closure door comprising: door frame, choking structure and dielectric, the dielectric sets up between door frame and choking structure, has improved the validity that closed door choking structure prevented the microwave leakage, and closed door adds the dielectric structure and has reduced the volume of choking structure, and then reduces the volume that microwave and radio frequency heating device closed the door, reduces microwave and radio frequency heating device's cost of manufacture, improves the practicality.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic view of a closure door according to a prior art;

FIG. 2 is a schematic view of a closure door in cooperation with microwave and RF heating apparatus, according to an exemplary embodiment;

figure 3 is a schematic diagram illustrating a closure door in cooperation with microwave and rf heating apparatus according to an exemplary embodiment.

Detailed Description

The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. As for the methods, products and the like disclosed by the embodiments, the description is simple because the methods correspond to the method parts disclosed by the embodiments, and the related parts can be referred to the method parts for description.

With the development of microwave heating, microwave and rf heating devices are increasing, for example: in some places such as supermarkets, cake shops and the like, the oven is used for preparing food; the traditional oven has larger volume, and products such as a microwave oven, a household oven and the like are continuously changed along with the improvement of living standard of people, and the traditional oven enters thousands of households; the radio frequency microwave heating is also gradually applied to places such as clothing factories or laundry where a large amount of clothes need to be dried quickly; the simple household clothes dryer is produced at present. While enjoying the convenience that more and more microwave and radio frequency heating devices bring to our lives, it is particularly important to prevent microwave leakage. Microwave leakage prevention first microwave and radio frequency or heating devices need to include a closed space to facilitate the taking and placing of articles, both microwave and radio frequency heating devices include closure devices, such as: the microwave oven comprises an oven door, wherein the oven door is closed in the heating process to seal the microwave heating cavity; the oven comprises an oven door, and similarly, the oven door is closed in the heating process to avoid microwave leakage; the drum-type clothes dryer comprises a cabinet door, and in the heating process of the clothes dryer, the cabinet door is closed to avoid microwave leakage. Therefore, the present invention provides a sealing door for microwave and rf heating devices, which is used to prevent microwave leakage from damaging human body.

In the prior art, a plurality of microwave and rf heating devices are disclosed for preventing microwave leakage, and as shown in fig. 1, a conventional microwave oven sealing door structure is disclosed, which includes a door frame 2 and a plurality of grooves 3 formed on the outer periphery of the door frame 2 to function as a choke chamber. Wherein, when the microwave oven frequency is at 2450MHz, the wavelength is shorter, the width of slot 3 is 3cm, along with the reduction of microwave oven frequency, the wavelength extension, easily leak, reduce to 915MHz when the microwave oven frequency, choke groove width can correspondingly increase to 8cm, reduce to 433MHz when the microwave oven frequency, choke groove width can correspondingly increase to 17cm, the corresponding structure size of corresponding microwave oven closing door also needs to increase, thereby cause the product overall design difficulty, the unusual heaviness that the door body becomes, the door body thickening leads to available inner chamber to diminish.

As shown in fig. 2, which is a schematic structural diagram of a closing door according to an embodiment of the present invention, the closing door includes: a doorframe bezel 1, a choke structure 2 and a dielectric 3. Wherein the choke structure 2 comprises: a first choke 21 and a second choke 22.

A dielectric 3 is arranged between the frame 1 and the choke structure 2. The first choke plate 21 and the second choke plate 22 are fitted in an L-shape. The first choke 21 extends perpendicularly to the doorframe rim 1 toward the microwave and radio frequency heating apparatus receiving chamber 5 along the edge of the doorframe rim 1, and the second choke 22 extends perpendicularly to the first choke 21 toward the center of the doorframe rim 1 along the free end of the first choke 21. The second choke plate 22 is adapted to abut against the side wall 4 of the microwave and rf heating device when the closing door 1 closes the microwave and rf heating device accommodating chamber 5, and prevent the microwave from leaking from the gap between the choke structure 2 and the side wall 4 of the microwave and rf heating device.

In different embodiments, the sealing door is correspondingly changed according to the different shapes of the sealing openings of the microwave and radio frequency heating devices so as to adapt to the shapes of the sealing openings of the microwave and radio frequency heating devices and avoid microwave leakage.

In the foregoing embodiments, the dielectric 3 is in the form of a solid, liquid, or gas. When the dielectric 3 is a solid dielectric, the dielectric 3 may be directly disposed between the doorframe bezel 1 and the choke structure 2. When the dielectric 3 is a liquid dielectric or a gas dielectric, the dielectric 3 is not easily filled directly in the choke groove formed between the choke structure 2 and the doorframe bezel 1.

In some alternative embodiments, as shown in fig. 3, the choke structure 2 further comprises: a third choke plate 23. The third choke plate 23 extends perpendicularly to the second choke plate 22 toward the doorframe side frame 1 along the free end of the second choke plate 22, and the third choke plate 23 is connected to the doorframe side frame 1. The doorframe border 1, the first choke plate 21, the second choke plate 22 and the third choke plate 23 form a closed choke cavity therebetween. The dielectric 3 is, among others, a solid dielectric, a gaseous dielectric or a liquid dielectric.

As shown in fig. 2 and 3, the thickness g of the choke structure 2 corresponds to the distance between the free end of the second choke plate 22 and the doorframe bezel 1, and the depth d of the choke structure 2 corresponds to the cross-sectional length of the second choke plate 22. In the conventional microwave and radio frequency heating device, the choke structure 2 is located between 1/7 and 1/6 of the microwave wavelength, the depth d of the choke structure 2 is 1/4 of the microwave wavelength, and when the microwave frequency in the microwave and radio frequency heating device is 915MHz, the microwave wavelength is 32.8cm, at this time, the conventional choke structure 2 is used to prevent the microwave leakage, the depth d of the choke structure 2 reaches 8.2cm, and the depth d of the choke structure 2 is 8.2cm, so that the door body becomes extremely thick and heavy, and simultaneously, the available inner cavity becomes small, and the manufacturing cost is greatly increased.

In the embodiment of the invention, the dielectric 3 is arranged between the doorframe frame 1 and the choke structure 2, and the dielectric 3 can play a role in improving the choke effect. Wherein the depth d of the choke structure 2 is proportional to the wavelength of the microwaves and the microwaves in the rf heating device and inversely proportional to the dielectric constant of the dielectric 3.

In some alternative embodiments, the depth d of the choke structure 2 is determined according to the following equation (1):

In alternative embodiments, the width g of the choke structure 2 is proportional to the wavelength of the microwaves in the microwave and rf heating device and inversely proportional to the dielectric constant of the dielectric 3.

In some alternative embodiments, the width g of the choke structure 2 is determined according to the following equation (2):

In some optional embodiments, the choke structure 2 is provided with a plurality of notches spaced along the length direction thereof, and the notches extend through the second choke plate 22, extend through the first choke plate 21 and end at a position adjacent to the connection between the first choke plate 21 and the doorframe side frame 1, extend through the third choke plate 23 and end at a position adjacent to the connection between the third choke plate 23 and the doorframe side frame 1. The design is used for inhibiting higher harmonics and realizing good microwave shielding effect in a wide frequency band range.

In some alternative embodiments, to further improve the effectiveness of the notches in suppressing higher harmonics, a plurality of notches are uniformly formed on the first choke plate 21, the second choke plate 22, and the third choke plate 23.

In some alternative embodiments, the width of the gap is 1/5 to 1/2 of the depth of the choke structure 2. The present invention also provides a microwave oven including: a furnace body and a closing door provided by any one of the previous embodiments. Wherein, the front side of furnace body is opened, and the closed door pivotally can be established in the front side of furnace body in order to open or close the chamber 5 that holds of furnace body.

The present invention also provides an oven comprising: a cabinet and a closure door as provided in any of the preceding embodiments. Wherein the front side of the cabinet is open, and the closing door is pivotably provided at the front side of the cabinet to open or close the receiving chamber 5 of the cabinet.

The present invention also provides a dryer, including: the body and the closed door provided by any one of the preceding embodiments. Wherein, the front side or the top side of the body is open, and the closing door is pivotally provided at the front side or the top side of the body to open or close the accommodating chamber 5 of the body.

The present invention also provides a thawing box, comprising: a cabinet and a closure door as provided in any of the preceding embodiments. Wherein the front side or the top side of the cabinet is opened, and the closing door is pivotably provided at the front side or the top side of the cabinet to open or close the receiving chamber 5 of the cabinet.

It should be understood that the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. The present invention is not limited to the procedures and structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims

1. An enclosed door for a microwave and radio frequency heating apparatus, comprising: a doorframe frame and a choke structure; it is characterized by also comprising: a dielectric disposed between the door frame bezel and the choke structure; the choke structure includes: the first choke plate and the second choke plate are matched in an L shape; the first choke plate extends to the microwave and radio frequency heating device accommodating cavity along the edge of the doorframe frame and perpendicular to the doorframe frame; the second choke plate extends perpendicularly to the first choke plate along a free end of the first choke plate toward a center of the doorframe side frame.

2. The closure of claim 1, wherein said choke structure further comprises: a third choke plate; the third choke plate extends towards the doorframe side frame along the free end of the second choke plate perpendicular to the second choke plate; a choke cavity is formed among the doorframe side frame, the first choke plate, the second choke plate and the third choke plate.

3. A closure door in accordance with claim 1 wherein the cross-sectional length of said second choke is proportional to the wavelength of microwaves within said microwave and rf heating means; the cross-sectional length of the second choke plate is inversely proportional to the dielectric permittivity.

4. A closure door in accordance with claim 1 wherein the distance between the free end of said second choke and said doorframe jamb is proportional to the wavelength of microwaves within said microwave and rf heating apparatus; the distance between the free end of the second choke plate and the doorframe rim is inversely proportional to the dielectric permittivity.

5. A closure door according to claim 2, wherein the dielectric is a solid dielectric, a gaseous dielectric or a liquid dielectric.

6. A closure door as in claim 2 wherein said choke structure is formed with a plurality of notches spaced along the length thereof, said notches extending through said second choke, through said first choke and terminating adjacent the junction of said first choke with said frame jamb and extending through said third choke and terminating adjacent the junction of said third choke with said frame jamb.

7. The closure door of claim 6, wherein the plurality of notches are uniformly formed in the first choke plate, the second choke plate, and the third choke plate.

8. A microwave oven, comprising: a furnace body and a closure door as claimed in any one of claims 1 to 7; the front side of the furnace body is open; the closed door can be pivotally arranged on the front side of the furnace body to open or close the accommodating cavity of the furnace body.

9. An oven, comprising: a cabinet and a closure door as claimed in any one of claims 1 to 7; the front side of the box body is open; the closed door is pivotally arranged on the front side of the box body to open or close the accommodating cavity of the box body.

10. A dryer, characterized by comprising: a body and a closure door as claimed in any one of claims 1 to 7; the front side or the top side of the machine body is open; the closing door is pivotally arranged on the front side or the top side of the machine body to open or close the accommodating cavity of the machine body.