CN215336506U - Non-contact control type microwave oven - Google Patents
Non-contact control type microwave oven Download PDFInfo
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- CN215336506U CN215336506U CN202120637035.1U CN202120637035U CN215336506U CN 215336506 U CN215336506 U CN 215336506U CN 202120637035 U CN202120637035 U CN 202120637035U CN 215336506 U CN215336506 U CN 215336506U
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Abstract
The utility model discloses a non-contact control type microwave oven, which comprises a box body; a cavity for placing food is arranged in the box body; the panel is arranged on the box body, and the outer wall of the panel is provided with an installation groove; the microwave module is used for heating food placed in the cavity; the main control system can control the microwave module to be turned on or turned off; optical display module assembly, optical display module assembly sets up on the mounting groove of panel and links to each other with major control system, and optical display module assembly includes: the device comprises an imaging module, a detection module and a control module, wherein the imaging module is used for forming a floating real image in the air, the detection module is used for detecting the operation of a user on the floating real image and feeding back a detected interaction signal to the control module, and the control module generates a corresponding control signal according to the interaction signal and sends the control signal to a main control system. According to the non-contact control type microwave oven, the difficulty of controlling the microwave oven can be reduced, and meanwhile, the non-contact operation is cleaner and more sanitary.
Description
Technical Field
The utility model relates to the technical field of microwave ovens, in particular to a non-contact control type microwave oven.
Background
In the prior art, a microwave oven is generally provided with a liquid crystal touch screen to display information of the microwave oven, and a user can touch a button on the liquid crystal touch screen to complete the operation and control of the microwave oven. However, when the user clicks the operation type microwave oven, the user needs to press the physical key on the microwave oven, because the physical key is small, the operation difficulty is large, and there are accidental risks such as electric shock, and oil stain residues are often left on the surface of the microwave oven, so that the contact operation is not clean and sanitary.
Disclosure of Invention
The utility model provides a non-contact control type microwave oven which has the advantages of easiness in control, no contact, cleanness, sanitation and high safety performance.
The utility model provides a non-contact control type microwave oven, which comprises a box body; a cavity for placing food is arranged in the box body; the panel is arranged on the box body, and an installation groove is formed in the outer wall of the panel; a microwave module to heat food placed within the cavity; the main control system can control the microwave module to be turned on or turned off; the optical display module assembly, the optical display module assembly sets up on the mounting groove of panel and with major control system links to each other, the optical display module assembly includes: the device comprises an imaging module, a detection module and a control module, wherein the imaging module is used for forming a floating real image in the air, the detection module is used for detecting the operation of a user on the floating real image and feeding back a detected interaction signal to the control module, and the control module generates a corresponding control signal according to the interaction signal and sends the control signal to a main control system.
In some embodiments, the inner wall of the mounting groove is provided with a clamping hole, and the optical display module is provided with a clamping hook matched with the clamping hole.
In some embodiments, the microwave oven further comprises a thermal breaker arranged in the box body, wherein the thermal breaker is used for monitoring the working temperature of the cavity and/or the microwave module and sending the temperature information to the master control system.
In some embodiments, the imaging module includes an equivalent negative refractive index optical element and a display, the display is disposed on one side of the equivalent negative refractive index optical element, and after light emitted by the display passes through the equivalent negative refractive index optical element, a floating real image opposite to the display is formed on the other side of the equivalent negative refractive index optical element.
In some embodiments, the equivalent negative index optical element comprises: the optical waveguide array comprises a first optical waveguide array and a second optical waveguide array, wherein the first optical waveguide array and the second optical waveguide array are tightly attached to each other on the same plane and are arranged orthogonally.
In some embodiments, the first optical waveguide array or the second optical waveguide array is composed of a plurality of parallel-arranged reflecting units arranged obliquely at 45 °, the cross section of each reflecting unit is rectangular, and a reflecting film is disposed along the same side or two sides of the stacking direction of the reflecting units.
In some embodiments, the reflective element has a cross-sectional width and length a and b, respectively, and satisfies: a is more than or equal to 0.1mm and less than or equal to 5mm, and b is more than or equal to 0.1mm and less than or equal to 5 mm.
In some embodiments, the equivalent negative index optical element further comprises two transparent substrates, the first and second arrays of optical waveguides being disposed between the two transparent substrates.
In some embodiments, the equivalent negative refractive index optical element further comprises an antireflection component and a viewing angle control component, the antireflection component and the viewing angle control component being disposed between the first optical waveguide array and the second optical waveguide array; or
The anti-reflection component and the visual angle control component are arranged between the transparent substrate and the first optical waveguide array; or
The antireflection member and the viewing angle control member are disposed between the transparent substrate and the second optical waveguide array.
In some embodiments, the optical display module further comprises: the total reflector is arranged on one side of the equivalent negative refractive index optical element and arranged on the same side of the display so as to reflect light rays emitted by the display to the equivalent negative refractive index optical element.
In some embodiments, the equivalent negative index optical element comprises: a retro-reflector and a beam splitter, the retro-reflector and the display being located on a same side of the beam splitter and the beam splitter reflecting light from the display to the retro-reflector, the beam splitter transmitting light from the retro-reflector.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
Fig. 1 is a schematic structural view of a contactless manipulation type microwave oven according to a first embodiment of the present invention;
fig. 2 is a block diagram of a control system of a contactless manipulation type microwave oven according to a first embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an optical display module according to a first embodiment of the present invention;
FIG. 4 is a schematic diagram of a human-computer interaction structure of an optical display module according to a first embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a plate lens according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a first optical waveguide array and a second optical waveguide array according to an embodiment of the present invention;
fig. 7 is a schematic front view of a plate lens according to an embodiment of the present invention in the thickness direction;
FIG. 8 is a schematic diagram of a partial structure of a first optical waveguide array and a second optical waveguide array according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of an optical path of a plate lens according to an embodiment of the present invention;
FIG. 10 is an internal optical path schematic of a plate lens according to an embodiment of the utility model;
FIG. 11 is a schematic imaging diagram of a flat lens according to an embodiment of the utility model;
FIG. 12 is a schematic view of an optical display module with additional total reflection mirrors according to a second embodiment of the present invention;
FIG. 13 is a schematic view of an optical display module according to a third embodiment of the utility model.
Reference numerals:
a microwave oven 1000, a cabinet 200, a main control system 300, a microwave module 400, a thermal cut-off 500,
the number of chambers 210, the table 211,
the transformer 410, the magnetron 420, the waveguide 430, the antenna 440,
the optical display module 100 is provided with a plurality of optical elements,
an imaging module 20, a flat lens 1, a display 2, a detection module 3, a floating real image 4, a control module 5,
a first optical waveguide array 6, a second optical waveguide array 7, a transparent substrate 8,
a reflecting unit 9, a reflecting film 10, an adhesive 11,
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials.
A first embodiment of the present invention provides a contactless operated microwave oven 1000. A contactless manipulation type microwave oven 1000 according to a first embodiment of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, a non-contact microwave oven 1000 according to an embodiment of the present invention includes: the food heating device comprises a box body 200, a main control system 300 arranged in the box body 200, a microwave module 400 used for heating food, a thermal circuit breaker 500 and an optical display module 100.
A cavity 210 for accommodating food is provided in the box 200, and preferably, the surface of the cavity 210 is made of a metal plate coated with a non-magnetic material. A vent hole (not shown) is formed at the top of the cavity 210, and high-temperature gas and water vapor in the heating process can be discharged through the vent hole. In one embodiment, the cavity 210 has a side length that is a multiple of the wavelength of the 1/2 microwave guided waves, such that the cavity can maintain resonance when the food is heated. The bottom of the cavity 210 is provided with a working table 211 on which food to be heated can be placed. Further, the table 211 may be rotatably provided, so that the convenience food is uniformly heated.
The cabinet 200 further includes a door 220 disposed at the front end of the cabinet 200, a panel 230 mounted at the front end of the cabinet 200, and four adjusting legs 240 mounted at the bottom end of the cabinet 200. The door 210 is rotatably installed on the cabinet 200, and food can be heated in the cavity or taken out of the cavity by opening the door 220. The door 220 is provided with a handle 221 and a visible window 222, the handle 221 is used for opening or closing the door 220, and the visible window 222 is used for facilitating a user to observe the condition of food in the cavity 210. The adjusting foot 240 is used to support the box body 200, and the adjusting foot 240 can adjust the box body 200 to keep the box body 200 horizontal. The main control system 300 is disposed in the cabinet 200 and can implement control of the microwave oven to operate various functions.
The microwave module 400 is disposed in the case 200 and electrically connected to the main control system 300. The microwave module 400 includes a transformer 410, a magnetron 420, a waveguide 430, and an antenna 440. The transformer 410 can provide high voltage, the magnetron 420 can convert electric energy into microwave energy by using the high voltage and a strong magnetic field, the microwave emitted from the magnetron 420 is transmitted to the bottom of the cavity 210 through the waveguide 430, and is emitted into the cavity 210 through the coupling action of the antenna 440, so as to heat food.
The thermal cut-out 500 is disposed in the case 200 and electrically connected to the main control system 300. For monitoring the operating temperature within the magnetron 420 or the chamber 210. When any one of the operating temperatures exceeds a certain limit, the thermal circuit breaker 500 sends a shutdown signal to the main control system 300, and the main control system 300 shuts down the microwave module 400 immediately after receiving the shutdown signal.
The optical display module 100 is disposed on the panel 230 and electrically connected to the main control system 300. The optical display module 100 can form an image in the air to form a floating real image 4, and a user can click the floating real image 4 to complete the control of the air conditioner 1000. It is understood that the optical display module 100 also includes a driving circuit and an associated input/output interface for connecting the above systems, which are omitted from the drawings.
According to some embodiments of the present invention, the outer wall of the panel 230 has a mounting groove, and the optical display module 100 is disposed in the mounting groove. It can be understood that, by disposing the optical display module 100 in the mounting groove, the optical display module 100 no longer protrudes from the surface of the panel 230, which is more visually attractive.
In some embodiments of the present invention, the inner wall of the mounting groove has a fastening hole, and the outer wall of the optical display module 100 has a fastening hook matching with the fastening hole. The hooks and the holes have the advantages of simple structure and easy assembly, and the optical display module 100 and the panel 230 can be tightly connected through the matching of the hooks and the holes. In addition, the cost can be reduced while the connection strength between the optical display module 100 and the panel 230 is ensured.
The optical display module 100 includes an imaging module 20, a detection module 3 and a control module 5. The imaging module 20 is used for displaying the image of the optical display module 100 in the air. The detection module 3 may detect the interaction operation of the user to generate interaction information, and transmit the interaction information to the control module 5. The control module 5 determines the specific operation content of the user according to the internal instruction set and the interaction information, generates a corresponding control signal, and sends the control signal to the main control system 300, and the main control system 300 can control the operation of the microwave oven according to the control signal. Meanwhile, the control system 300 transmits the operation interface or the control result corresponding to the control signal to the optical display module 100, and displays the image in the air through the imaging module 20, so that the user can conveniently operate the next step or know the control result.
As shown in fig. 3 and 4, the imaging module 20 includes an equivalent negative refractive optical element and a display 2, in an embodiment, the equivalent negative refractive optical element may be a flat lens 1, the display 2 is disposed on one side of the flat lens 1, and after light emitted from the display 2 passes through the flat lens 1, a floating real image 4 opposite to the display 2 is formed on the other side of the flat lens 1. The detection module 3 is used for detecting the operation of the user on the floating real image 4 and feeding back the detected interactive signal to the control module 5. Specifically, the optical display module 100 may present the state information of the microwave oven and the information such as the operation buttons displayed by the display 2 on the floating real image 4, so that the user can know the current state of the microwave oven through the floating real image 4 and control the microwave oven 1000 by clicking the virtual button of the floating real image.
In one embodiment, when a user needs to heat food, the door 220 is opened by the handle 221, the food to be heated is placed in the working platform 211 of the cavity 210, and then the door 220 is closed. After the user clicks the corresponding heating mode and heating time in the floating real image 4, the detection module 3 detects the interaction operation of the user, and feeds back the interaction information to the control module 5, and the control module 5 judges the preset heating mode and the preset heating time set by the user according to the internal instruction set and the interaction information, so as to generate a corresponding control signal and send the control signal to the main control system 300. After the main control system 300 receives the control signal, the microwave module 400 is controlled to heat the food in the corresponding preset heating mode, and the worktable 211 is controlled to rotate to heat the food uniformly. In the heating process, high-temperature gas and water vapor may be discharged through the vent holes, the thermal circuit breaker 500 monitors the working temperatures of the magnetron 420 and the cavity 210 in real time, when any one of the working temperatures exceeds a certain limit value, the thermal circuit breaker 500 may send a cut-off signal to the main control system 300, and the main control system 300 immediately turns off the microwave module 400 after receiving the cut-off signal. After heating for the preset heating time, the main control system 300 controls the microwave module 400 to be turned off, and controls the worktable 211 to stop rotating. At this time, the optical display module 100 prompts the user that the food heating is completed through the floating real image 4, and the user can open the door 220 to take out the food from the cavity 210. Through the above operation, the difficulty of operating the microwave oven 1000 can be reduced, the risks of accidental electric shock and the like of a user are reduced, the safety is higher, meanwhile, the non-contact operation is cleaner and more sanitary, and the pollution to the surface of the microwave oven 1000 due to the fact that the user touches the microwave oven 1000 is avoided.
It is understood that the main control system 300 can complete other manipulation functions by the user clicking other interfaces or buttons of the floating real image 4, not just the function of food heating.
The structure and imaging principle of the flat lens according to the present invention will be described with reference to fig. 5 to 11, which will be described in detail below.
As shown in fig. 5 to 6, the equivalent negative refractive index optical element may employ a flat lens 1, the flat lens 1 including two transparent substrates 8, and a first optical waveguide array 6 and a second optical waveguide array 7 interposed between the two transparent substrates 8. The first optical waveguide array 6 and the second optical waveguide array 7 are closely attached to each other on the same plane and are orthogonally arranged. Preferably, the first optical waveguide array 6 and the second optical waveguide array 7 are the same thickness, which facilitates design and production. Specifically, as shown in fig. 5, the flat lens includes a first transparent substrate 8, a first optical waveguide array 6, a second optical waveguide array 7, and a second transparent substrate 8 in this order from the display 2 side to the floating real image 4 side.
Wherein the first transparent substrate 8 and the second transparent substrate 8 each have two optical surfaces, and the transparent substrate 8 has a transmittance of 90% to 100% for light having a wavelength of 390nm to 760 nm. The material of the transparent substrate 8 may be at least one of glass, plastic, polymer, and acrylic for protecting the optical waveguide array and filtering out excessive light. Note that, if the strength after the first optical waveguide array 6 and the second optical waveguide array 7 are bonded to each other in an orthogonal manner is sufficient, or if the thickness of the mounting environment is limited, only one transparent substrate 8 may be disposed, or no transparent substrate 8 may be disposed.
As shown in fig. 6, the first optical waveguide array 6 and the second optical waveguide array 7 are composed of a plurality of reflection units 9 having a rectangular cross section, and the lengths of the reflection units 9 are limited by the peripheral dimensions of the optical waveguide arrays so as to be different in length. The extending direction of the reflecting unit 9 in the first optical waveguide array 6 is X, the extending direction of the reflecting unit 9 in the second optical waveguide array 7 is Y, and the Z direction is the thickness direction of the optical waveguide array. The extending directions (optical waveguide array directions) of the reflecting units 9 in the first optical waveguide array 6 and the second optical waveguide array 7 are perpendicular to each other, namely, the first optical waveguide array 6 and the second optical waveguide array 7 are orthogonally arranged when viewed from the Z direction (thickness direction), so that two light beams in the orthogonal directions are converged at one point, and the object image planes (the light source side and the imaging side) are ensured to be symmetrical relative to a flat lens, an equivalent negative refraction phenomenon is generated, and aerial imaging is realized.
As shown in fig. 7, the first optical waveguide array 6 or the second optical waveguide array 7 is composed of a plurality of parallel arranged reflection units 9 obliquely arranged with being deflected by 45 ° at the user viewing angle. Specifically, the first optical waveguide array 6 may be composed of reflection units 9 arranged side by side at 45 ° in the lower left direction and having a rectangular cross section, the second optical waveguide array 7 may be composed of reflection units 9 arranged side by side at 45 ° in the lower right direction and having a rectangular cross section, and the arrangement directions of the reflection units 9 in the two optical waveguide arrays may be interchanged. For example, the extending direction of the reflection unit 9 in the first optical waveguide array 6 is Y, the extending direction of the reflection unit 9 in the second optical waveguide array 7 is X, the Z direction is the thickness direction of the optical waveguide array, and the first optical waveguide array 6 and the second optical waveguide array 7 are orthogonally arranged when viewed from the Z direction (thickness direction), so that two light beams in the orthogonal direction converge at one point, and the object image planes (light source side and image forming side) are ensured to be symmetrical with respect to the flat lens, thereby generating an equivalent negative refraction phenomenon and realizing aerial imaging. The optical waveguide material has an optical refractive index n1, in some embodiments, n1>1.4, for example, n1 is 1.5, 1.8, 2.0, and the like.
As shown in fig. 8, for the first optical waveguide array 6 and the second optical waveguide array 7, two interfaces exist between each reflection unit 9 and its adjacent reflection unit 9, and the interfaces are bonded by an adhesive 11 having a good light transmittance. Preferably, the adhesive 11 may be selected from a photosensitive adhesive or a thermosetting adhesive, and the thickness of the adhesive 13 is T1, and T1>0.001mm is satisfied, for example, T1 ═ 0.002mm or T1 ═ 0.003mm or T1 ═ 0.0015mm, and the specific thickness may be set according to specific needs. And adhesives 11 are respectively arranged between the adjacent optical waveguide arrays in the flat lens 1 and between the optical waveguide arrays and the transparent substrate 8, so that the firmness is improved.
In some embodiments, the reflection unit 9 may have a rectangular cross section, and the reflection film 10 is provided along one side or both sides of the arrangement direction of the reflection unit 9. Specifically, in the arrangement direction of the optical waveguide array, two sides of each reflection unit 9 are plated with a reflection film 10, and the material of the reflection film 10 may be a metal material such as aluminum, silver, or other non-metal compound material that realizes total reflection. The reflecting film 10 is used for preventing light rays from entering an adjacent optical waveguide array due to no total reflection to form stray light to influence imaging. Alternatively, each reflection element 9 may be formed by adding a dielectric film to the reflection film 10, and the dielectric film may improve the light reflectance.
The cross section width a and the cross section length b of the single reflection unit 9 satisfy 0.1mm ≤ a ≤ 5mm, 0.1mm ≤ b ≤ 5mm, and further satisfy 0.1mm ≤ a ≤ 2mm, and 0.1mm ≤ b ≤ 2mm for better imaging effect. For example, a is 0.2mm, b is 0.2 mm; or a is 0.5mm and b is 0.5 mm. When a large screen is displayed, the requirement of large size can be realized by splicing a plurality of optical waveguide arrays. The overall shape of the optical waveguide array is set according to the application scene, in this embodiment, the two groups of optical waveguide arrays are integrally rectangular, the two diagonal reflection units 9 are triangular, and the middle reflection unit 9 is a trapezoidal structure. The lengths of the single reflection units 9 are different, the reflection unit 9 positioned on the diagonal of the rectangle has the longest length, and the reflection units 9 at the two ends have the shortest length. In addition, the flat lens 1 may further include an anti-reflection component and a viewing angle control component, and the anti-reflection component may improve the overall transmittance of the flat lens and improve the definition and brightness of the floating real image 4. The visual angle control component can be used for eliminating the afterimage of the floating real image 4, reducing the vertigo of an observer, preventing the observer from peeping into the device from other angles, and improving the overall attractiveness of the device. The anti-reflection component and the viewing angle control component may be combined, or may be separately disposed between the transparent substrate 8 and the waveguide array, between two waveguide arrays, or on the outer layer of the transparent substrate 8.
The imaging principle of the flat lens is explained below with reference to fig. 9 to 11, and the details are as follows.
On the micrometer scale, a mutually orthogonal double-layer waveguide array structure is used for orthogonal decomposition of arbitrary optical signals. The original signal is projected on the first optical waveguide array 6, a rectangular coordinate system is established by taking the projection point of the original signal as the origin and taking the projection point of the original signal as the X axis perpendicular to the first optical waveguide array 6, and the original signal is decomposed into two paths of mutually orthogonal signals of a signal X positioned on the X axis and a signal Y positioned on the Y axis in the rectangular coordinate system. When the signal X passes through the first optical waveguide array 6, the signal X is totally reflected on the surface of the reflective film 10 at a reflection angle equal to the incident angle; at this time, the signal Y remains parallel to the first optical waveguide array 6, and after passing through the first optical waveguide array 6, the signal Y is totally reflected on the surface of the reflective film 10 at the same reflection angle as the incident angle on the surface of the second optical waveguide array 7, and the reflected optical signal composed of the reflected signal Y and the signal X is mirror-symmetric to the original optical signal. Therefore, the light rays in any direction can realize mirror symmetry through the flat lens 1, the divergent light of any light source can be converged into a floating real image again at a symmetrical position through the flat lens 1, the imaging distance of the floating real image is the same as the distance from the flat lens 1 to an image source, namely a display 2, the floating real image is imaged at equal distance, and the floating real image is positioned in the air without a specific carrier but directly presents the real image in the air. Therefore, the image in the space seen by the user is the image emitted from the display 2.
In the embodiment of the utility model, the light source of the display 2 emitsThe above-described process occurs on the flat lens 1 while the light passes through the flat lens 1. Specifically, as shown in fig. 10, the incident angles of the light rays on the first optical waveguide arrays 6 are α, respectively1、α2And alpha3The reflection angle of the light on the first optical waveguide array 6 is beta1、β2And beta3In which α is1＝β1，α2＝β2，α3＝β3After being reflected by the first optical waveguide array 6, the incident angles on the second optical waveguide array 7 are respectively gamma1、γ2And gamma3The reflection angles at the second optical waveguide arrays 7 are respectively δ1、δ2And delta3Wherein γ is1＝δ1，γ2＝δ2，γ3＝δ3。
Further, the incident angles after the convergent imaging are respectively alpha1，α2，α3……αnWhen the distance between the light source of the display 2 and the flat lens is L, the distance between the imaging position of the floating real image and the flat lens is also L, and the viewing angle ∈ of the floating real image is 2 times max (α).
It can be understood that if the size of the optical waveguide array is small, the image can be seen only at a certain distance from the imaging side of the optical waveguide array; if the size of the optical waveguide array is increased, a larger imaging distance can be realized, and thus the visual field rate is increased.
Preferably, the included angle between the flat lens 1 and the display 2 is set to be in the range of 45 ° ± 5 °, so that the size of the flat lens 1 can be effectively utilized, the imaging quality is improved, and the influence of afterimages is reduced. Furthermore, if there is another demand for the imaging position, another angle may be selected at the expense of the partial imaging quality, and the flat lens 1 is preferably sized to display the screen of the floating real image 4 presented by the entire display 2. However, if only a part of the display 2 needs to be seen in actual use, the size and position of the flat lens 1 can be freely adjusted according to the actual display, which is not limited in this respect.
In addition, the principle of imaging with the slab lens 1 adopting the double-layer optical waveguide array structure is mainly described above, but in other embodiments, if the plurality of cubic columnar reflection units 9 with the reflection films 12 are provided on all four peripheral surfaces, and the plurality of cubic columnar reflection units 9 are arranged in an array in the X and Y directions in the one-layer optical waveguide array structure, that is, the two layers of optical waveguide arrays are combined into one layer, the imaging principle of the slab lens 1 may also be the same as that of the double-layer optical waveguide array structure.
In the embodiment, the thicknesses of the first optical waveguide array 6 and the second optical waveguide array 7 are the same, so that the complexity of the structures of the first optical waveguide array 6 and the second optical waveguide array 7 can be simplified, the manufacturing difficulty of the first optical waveguide array 6 and the second optical waveguide array 7 can be reduced, the production efficiency of the first optical waveguide array 6 and the second optical waveguide array 7 can be improved, and the production cost of the first optical waveguide array 6 and the second optical waveguide array 7 can be reduced. It should be noted that the thickness is the same in a relative range, and is not absolutely the same, that is, for the purpose of improving the production efficiency, a certain thickness difference may exist between the optical waveguide arrays without affecting the aerial imaging quality.
According to some embodiments of the present invention, the outer wall of the panel 200 has a mounting groove, and the optical display module 100 is disposed in the mounting groove. It can be understood that, by disposing the optical display module 100 in the mounting groove, the optical display module 100 no longer protrudes from the surface of the panel 200, which is more visually attractive.
In some embodiments of the present invention, the inner wall of the mounting groove has a fastening hole, and the outer wall of the optical display module 100 has a fastening hook matching with the fastening hole. The hooks and the holes have the advantages of simple structure and easy assembly, and the optical display module 100 and the panel 200 can be tightly connected through the matching of the hooks and the holes. In addition, the cost can be reduced while the connection strength between the optical display module 100 and the panel 200 is ensured.
According to some embodiments of the present invention, the imaging mode of the Display 2 may include RGB (red, green, blue) Light Emitting Diodes (LEDs), LCD (Liquid Crystal Display), LCOS (Liquid Crystal on Silicon) devices, OLED (Organic Light-Emitting Diode) arrays, projection, laser Diode, or any other suitable Display or stereoscopic Display, without limitation.
In an embodiment, the luminance of the display 2 may be set to not less than 500cd/m2Thereby reducing the effect of brightness loss in the optical path propagation. Of course, in practical applications, the display brightness of the display 2 may be adjusted according to the brightness of the ambient light.
In addition, according to some embodiments of the present invention, the visible angle control processing is performed on the display image surface of the display 2, so that the ghost of the floating real image 4 can be reduced, the image quality can be improved, and the peeping of others can be prevented, thereby being widely applied to other input devices requiring privacy information protection.
According to some embodiments of the present invention, the detection module 3 may be a far-near infrared sensor, an ultrasonic sensor, a laser interference sensor, a grating sensor, an encoder, a fiber optic sensor, or a CCD sensor. That is, the sensing form of the detection module 3 includes, but is not limited to, far and near infrared, ultrasonic, laser interference, grating, encoder, fiber optic type or CCD (charge coupled device), etc. The sensing area of the detection module 3 and the floating real image 4 are located on the same plane and comprise a three-dimensional space where the floating real image is located, an optimal sensing form can be selected according to an installation space, a viewing angle and a use environment, a user can conveniently operate the floating real image 4 in an optimal posture, and the sensitivity and the convenience of user operation are improved.
According to some embodiments of the present invention, the control module 5, the imaging module 20, and the detection module 3 may be connected in a wired or wireless manner to transmit digital or analog signals, so as to flexibly control the volume of the optical display module 100 and enhance the electrical stability of the optical display module 100.
The following describes a non-contact manipulation type microwave oven 1000 according to a second embodiment of the present invention with reference to fig. 12. The remaining configuration is the same as that of the first embodiment except for the difference in the structure of the optical display module 100, and thus, the repeated description of the same configuration with the same reference numerals will be omitted.
The structure of the optical display module 100 is characterized in that a total reflection mirror 12 is added on the side of the flat lens 1 where the display 2 is located. Light emitted by the display 2 is reflected by the total reflection mirror 12, enters the flat lens 1, and finally converges on the other side of the flat lens 1, so that a floating real image 4 is formed. The function and structure of the detection module 3 and the control module 5 are the same as those of the first embodiment.
It can be seen that, in this embodiment, after the light of the display 2 is reflected by the total reflection mirror 12, a virtual image 13 that is as large as the display 2 and is plane-symmetric with respect to the total reflection mirror 12 is equivalently formed on the other side of the total reflection mirror 12, and the floating real image 4 is actually mirror-symmetric with respect to the flat lens 1 with the virtual image 13. Preferably, the included angle between the flat lens 1 and the virtual image 13 is set to be in the range of 45 ° ± 5 °, so that the size of the flat lens 1 can be more fully utilized, and simultaneously, better imaging quality and smaller afterimage influence are obtained. But other angles may be chosen at the expense of partial imaging quality if there are other requirements on the imaging position. It is also preferable that the size of the flat lens 1 and the total reflection mirror 12 is set so that the user can see the picture of the aerial image 4 presented by the entire display 2 at a glance, but if it is necessary to see only a part of the content of the display 2 in actual use, the size and position of the flat lens 1 can be freely adjusted according to the actual display picture.
The effect of this embodiment is that the orientation of the display screen in the display 2 can be changed, and the display 2 can be disposed closer to the flat lens 1, and under the condition that the distance between the floating real image 4 and the flat lens 1 is not changed, the overall thickness of the optical display module 100 is significantly reduced, so as to be better integrated into the contactless control type microwave oven 1000.
It is understood that a plurality of total reflection mirrors 12 (not shown) may be disposed in the optical display module 100, and the light of the display 2 is reflected therein for a plurality of times to form a virtual image farther away from the flat lens 1, so as to further reduce the thickness of the optical display module 100.
A contactless manipulation type microwave oven 1000 according to a third embodiment of the present invention will be described with reference to fig. 13. The remaining configuration is the same as that of the first embodiment except for the difference in the structure of the optical display module 100, and thus, the repeated description of the same configuration with the same reference numerals will be omitted.
The optical display module 100 is characterized in that a retro-reflector 14 is used to replace the flat lens 1, and a beam splitter 15 is added to reconverge the light from the display 2 in the air to present a floating real image 4.
Specifically, the imaging principle of the present embodiment is as follows:
light emitted from the display 2 is first reflected by the beam splitter 15 to the surface of the retro-reflector 14, and the beam splitter 15 is a beam splitter that is semi-transparent to visible light, i.e., has characteristics of 50% transmittance and 50% reflectance with respect to visible light. When this portion of the light is incident on the surface of the retro-reflector 14, it is reflected again by the microstructures inside the retro-reflector 14 and the reflected light is returned from a direction opposite to that of the incident light, at which time the reflected light is transmitted through the beam splitter 15, thereby forming a floating real image 4 in the air in a position where the display 2 is plane-symmetric with respect to the beam splitter 15.
The beam splitter 15 is used to split a light beam into two light beams, one light beam is transmitted and the other light beam is reflected, and is made of a metal film or a dielectric film, and the ratio of reflection to transmission is about 1:1 in the embodiment, which can be classified into a polarized type and a non-polarized type in principle.
The retro-reflector 14 has a retro-reflection effect on its surface, which reflects incident light from a direction close to the opposite direction of its incident direction, and is covered with micro glass beads or micro prism structures, which refracts and reflects incident light through internal microstructures, so that light exits in the opposite direction of the incident direction. Since the structure of the retro-reflector 14 is relatively conventional, it will not be described herein in more detail.
Furthermore, according to some embodiments of the present invention, 1/4 wave plate 16 may be disposed on the surface of the retro-reflector 14, if the light emitted from the display 2 is linearly polarized, reflected by the polarizing beam splitter 15, then enters the retro-reflector 14 through 1/4 wave plate 16, and the reflected light returns from the opposite direction to the incident light and passes through 1/4 wave plate 16 again, at which time the polarization plane of the linearly polarized light emitted from the display 2 is rotated by 90 degrees, so that it can be emitted from the polarizing beam splitter 15 and converged into a floating image 4 in the air. The method can greatly improve the energy utilization rate of the light of the display 2 and reduce the light intensity loss, thereby improving the brightness of the floating real image 4. It will be appreciated that if the display 2 is sufficiently bright, or if the light emitted by the display 2 is not linearly polarized, a non-polarizing beam splitter 15 may be used without 1/4 wave plate 16.
According to the contactless control type microwave oven 1000 of the embodiment of the present invention, the floating real image 4 is formed at the determined position of the display picture in the air by the interactive aerial imaging technology, the user can operate according to the picture information in the floating real image 4, when the user operation information is detected, the detection module 3 detects the interactive operation, so as to obtain the interactive information of the user, the control module 5 processes and analyzes the obtained interactive information by combining with the internal instruction set, determines the specific operation content of the user, generates the corresponding control signal, and sends the control signal to the main control system 300 of the microwave oven, and the main control system 300 can control the microwave oven to operate according to the control signal, so as to complete the operation purpose of the user. Therefore, the operation mode of the user is more convenient and visual, the user is prevented from contacting the microwave oven body during operation, the risks such as accidental electric shock of the user are reduced, the safety is higher, meanwhile, the non-contact operation is cleaner and more sanitary, and the pollution to the surface of the microwave oven caused by the fact that the user touches the microwave oven is avoided.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (11)
1. A contactless operating microwave oven, comprising:
a box body; a cavity for placing food is arranged in the box body;
the panel is arranged on the box body, and an installation groove is formed in the outer wall of the panel;
a microwave module to heat food placed within the cavity;
the main control system can control the microwave module to be turned on or turned off;
the optical display module assembly, the optical display module assembly sets up on the mounting groove of panel and with major control system links to each other, the optical display module assembly includes: the device comprises an imaging module, a detection module and a control module, wherein the imaging module is used for forming a floating real image in the air, the detection module is used for detecting the operation of a user on the floating real image and feeding back a detected interaction signal to the control module, and the control module generates a corresponding control signal according to the interaction signal and sends the control signal to a main control system.
2. The microwave oven according to claim 1, wherein the inner wall of the mounting groove has a locking hole, and the optical display module has a hook engaged with the locking hole.
3. The microwave oven according to claim 1, further comprising a thermal circuit breaker disposed in the cabinet, wherein the thermal circuit breaker is configured to monitor an operating temperature of the cavity and/or the microwave module and transmit temperature information to the main control system.
4. The microwave oven as claimed in claim 1, wherein the imaging module comprises an equivalent negative refractive index optical element and a display, the display is disposed on one side of the equivalent negative refractive index optical element, and after the light emitted from the display passes through the equivalent negative refractive index optical element, a floating real image opposite to the display is formed on the other side of the equivalent negative refractive index optical element.
5. The contactless manipulation type microwave oven according to claim 4, wherein the equivalent negative refractive index optical element comprises: the optical waveguide array comprises a first optical waveguide array and a second optical waveguide array, wherein the first optical waveguide array and the second optical waveguide array are tightly attached to each other on the same plane and are arranged orthogonally.
6. The microwave oven according to claim 5, wherein the first optical waveguide array or the second optical waveguide array is composed of a plurality of reflecting units arranged in parallel and arranged at an angle of 45 °, the reflecting units have a rectangular cross section, and a reflecting film is provided along the same side or both sides of the stacking direction of the reflecting units.
7. The microwave oven according to claim 6, wherein the reflecting unit has a cross-sectional width and a cross-sectional length of a and b, respectively, and satisfies: a is more than or equal to 0.1mm and less than or equal to 5mm, and b is more than or equal to 0.1mm and less than or equal to 5 mm.
8. The contactless manipulation microwave oven of claim 5, wherein the equivalent negative refractive index optical element further comprises two transparent substrates, the first optical waveguide array and the second optical waveguide array being disposed between the two transparent substrates.
9. The contactless manipulation type microwave oven according to claim 8, wherein the equivalent negative refractive index optical element further comprises an antireflection member and a viewing angle control member, the antireflection member and the viewing angle control member being disposed between the first optical waveguide array and the second optical waveguide array; or
The anti-reflection component and the visual angle control component are arranged between the transparent substrate and the first optical waveguide array; or
The antireflection member and the viewing angle control member are disposed between the transparent substrate and the second optical waveguide array.
10. The microwave oven of claim 4, wherein the optical display module further comprises: the total reflector is arranged on one side of the equivalent negative refractive index optical element and arranged on the same side of the display so as to reflect light rays emitted by the display to the equivalent negative refractive index optical element.
11. The contactless manipulation type microwave oven according to claim 4, wherein the equivalent negative refractive index optical element comprises: a retro-reflector and a beam splitter, the retro-reflector and the display being located on a same side of the beam splitter and the beam splitter reflecting light from the display to the retro-reflector, the beam splitter transmitting light from the retro-reflector.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120637035.1U CN215336506U (en) | 2021-03-26 | 2021-03-26 | Non-contact control type microwave oven |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120637035.1U CN215336506U (en) | 2021-03-26 | 2021-03-26 | Non-contact control type microwave oven |
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| CN215336506U true CN215336506U (en) | 2021-12-28 |
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