Anti-interference intelligent microwave oven

Abstract

The invention relates to an anti-interference intelligent microwave oven, and the microwave oven comprises a box body which comprises a controller installation part; the wireless module is arranged on the controller mounting part; the microstrip antenna is arranged on the outer side surface of the box body and is electrically connected with the wireless module through a feeder line; and the microstrip antenna is used for receiving a wireless signal, converting the received wireless signal into an electric signal and sending the electric signal to the wireless module for processing, or converting the electric signal sent by the wireless module into a wireless signal and sending the wireless signal. The feeder connects the wireless module with the microstrip antenna, and the microstrip antenna is placed on the outer side surface of the anti-interference intelligent microwave oven box body, so that the microstrip antenna is far away from the microwave generator, and the problem that the wireless module is interfered by electromagnetic wave radiation when the intelligent microwave oven works is solved; the wireless module can perform normal communication when the intelligent microwave oven works.

Description

Technical Field

[0001] The present application relates to the field of wireless communications, and in particular to an anti-interference intelligent microwave oven. Background Art

[0002] Microwave ovens have become one of the indispensable devices in modern families due to their fast heating, high efficiency and energy saving, and multi-functions. With the trend of intelligence, smart microwave ovens have also begun to enter people's field of vision.

[0003] Microwave ovens can complete various remote tasks and set tasks by embedding wireless modules in the 2.4G frequency band. However, the frequency band of microwave ovens is mostly 2.4G, and the power of microwave ovens is between 800W and 2000W, which is much greater than the transmission power of wireless modules.

[0004] The antenna is a key component in the module, which is responsible for sending and receiving electromagnetic radiation from the air. The wireless module usually has an onboard antenna, and the wireless module is embedded in the oven of the microwave oven. Therefore, when the microwave is working, the electromagnetic radiation in the microwave oven exceeds the receiving capacity of the wireless module. Therefore, the electromagnetic radiation of the microwave oven generates co-frequency interference to the wireless module, making it impossible for the wireless module to communicate normally. Therefore, there is a problem that the electromagnetic wave radiation of the microwave oven interferes with the wireless module when it is working. Summary of the invention

[0005] The embodiment of the present application provides an anti-interference intelligent microwave oven to at least solve the problem in the related art that electromagnetic wave radiation of the anti-interference intelligent microwave oven interferes with the wireless module during operation.

[0006] In a first aspect, an embodiment of the present application provides an anti-interference intelligent microwave oven, the anti-interference intelligent microwave oven comprising:

[0007] A box body, the box body including a controller mounting portion;

[0008] A wireless module is arranged on the controller mounting portion; and

[0009] The microstrip antenna is arranged on the outer surface of the box and is electrically connected to the wireless module through a feeder; the microstrip antenna is used to receive wireless signals, convert the received wireless signals into electrical signals and send them to the wireless module for processing, or convert the electrical signals sent by the wireless module into wireless signals and send them.

[0010] In one embodiment, the microstrip antenna includes a ground layer and a radiating layer which are stacked;

[0011] The grounding layer is used to be connected to the outer side of the box body and is provided with a feeding point, and the feeding point is electrically connected to the feeder line;

[0012] The transmitting layer is provided with a transmitting element, which is electrically connected to the feeding point and is used for receiving and transmitting wireless signals.

[0013] In one embodiment, the radiating element is laid on the radiating layer, and the length of the radiating element and the length of the grounding layer satisfy:

[0014] L GND =L+6*h

[0015] Among them, L GND is the length of the ground plane in millimeters

[0016] L is the length of the launcher, in millimeters,

[0017] h is the thickness of the emission layer in millimeters.

[0018] In one embodiment, the length of the ground layer is greater than or equal to 35 mm and less than or equal to 39.1 mm.

[0019] In one embodiment, the radiating element is laid on the radiating layer, and the width of the radiating element and the width of the grounding layer satisfy:

[0020] W GND =W+6*h

[0021] Among them, W GND is the width of the ground plane in millimeters,

[0022] W is the width of the launcher, in millimeters,

[0023] h is the thickness of the emission layer in millimeters.

[0024] In one embodiment, the width of the ground layer is greater than or equal to 43 mm and less than or equal to 47.6 mm.

[0025] In one embodiment, the radiating element is a quadrilateral including a long side and a wide side, the feeding point is located on the midline of the wide side, and the distance to the geometric center of the radiating element is greater than or equal to 7.14 mm and less than or equal to 7.52 mm.

[0026] In one embodiment, the box further includes a shielding component, which is disposed on the outer side of the box and shields the emitting layer of the microstrip antenna.

[0027] The anti-interference intelligent microwave oven provided by the embodiment of the present application has at least the following technical effects.

[0028] By connecting the wireless module to the microstrip antenna through a feeder and placing the microstrip antenna on the outer side of the anti-interference smart microwave oven body, the microstrip antenna is kept away from the microwave generator, thereby solving the problem of electromagnetic wave radiation interfering with the wireless module when the microwave oven is working, and enabling the wireless module to communicate normally when the anti-interference smart microwave oven is working.

[0029] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0031] Figure 1 is a schematic structural diagram of an anti-interference intelligent microwave oven according to an exemplary embodiment;

[0032] Figure 2 is a schematic diagram showing the connection between a wireless module and a microstrip antenna according to an exemplary embodiment;

[0033] Figure 3 is a schematic structural diagram of a microstrip antenna according to an exemplary embodiment;

[0034] Figure 4 is a schematic diagram of a three-dimensional structure of a microstrip antenna according to an exemplary embodiment.

[0035] In the above drawings, the meanings of the reference numerals are as follows:

[0036] 100, box body, 110, left and right side panels, 120, control panel, 130, shielding component;

[0037] 200, control installation unit; 300, unlimited modules;

[0038] 400, microstrip antenna, 410, ground layer, 411, feed point, 412, isolation ring, 420, transmitting layer, 421, transmitting element. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0040] Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. In addition, it can also be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in this field related to the content disclosed in this application, some changes in design, manufacturing or production based on the technical content disclosed in this application are just conventional technical means, and should not be understood as insufficient content disclosed in this application.

[0041] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0042] Unless otherwise defined, the technical terms or scientific terms involved in this application should be understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the" and the like involved in this application do not indicate a quantitative limitation, and may represent the singular or plural. The terms "include", "comprise", "have" and any of their variations involved in this application are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there may be three relationships, for example, "A and / or B" can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0043] The embodiment of the present application provides an anti-interference intelligent microwave oven. Figure 1 is a schematic diagram of the structure of an anti-interference intelligent microwave oven according to an exemplary embodiment. Figure 1As shown, the anti-interference intelligent microwave oven includes a box 100. The box 100 includes a top plate, a bottom plate, a rear plate, left and right side plates 110, a furnace door and a control panel 120 to form a closed cavity. In the closed cavity, a controller installation part 200 is also provided, and the position of the control installation part 200 is close to any one of the left and right side plates 110. The rest of the cavity forms a microwave heating cavity for placing food so that the food can be heated.

[0044] The control installation part includes a wireless module 300, a power supply, a magnetron and a control circuit. The magnetron generates microwave energy by utilizing the spiral motion of electron flow in a magnetic field, thereby heating food. The control circuit controls the microwave energy output by the magnetron by adjusting the frequency and amplitude of the control signal.

[0045] The wireless module 300 is arranged on the controller installation part, for example, near the power supply. The wireless module 300 is a hardware device with wireless communication function, which usually includes components such as radio frequency circuit and baseband processor. The anti-interference smart microwave oven realizes communication with other electronic devices for data transmission and exchange through the wireless module. For example, the smart microwave oven is embedded with a wireless module, and the user can control the smart microwave oven through the app on the mobile phone.

[0046] The anti-interference intelligent microwave oven provided by the embodiment of the present application also includes a microstrip antenna 400. The microstrip antenna 400 is used to receive and send wireless signals. On the one hand, the microstrip antenna 400 converts the received wireless signal into an electrical signal and sends it to the wireless module 300 for processing. On the other hand, the wireless module 300 converts the electrical signal to be sent into a wireless signal and transmits the wireless signal to the microstrip antenna 400, so that the microstrip antenna 400 sends the wireless signal.

[0047] Figure 2 FIG. 1 is a schematic diagram showing the connection between a wireless module and a microstrip antenna according to an exemplary embodiment. Figure 2 As shown, the microstrip antenna 400 is arranged on the outer surface of the box 100, for example, on the control panel 120, or on either side panel 110. The position of the microstrip antenna 400 is placed according to the design of the specific anti-interference intelligent microwave control panel. In addition, the microstrip antenna 400 is connected to the wireless module 300 through a feeder. The microstrip antenna 400 is far away from the magnetron, so the electromagnetic radiation of the magnetron has a weakened effect on the microstrip antenna.

[0048] To sum up, in the anti-interference intelligent microwave oven provided by the embodiment of the present application, the wireless module and the microstrip antenna are connected by a radio frequency feeder, the wireless module and the microstrip antenna are separated, the wireless module is arranged on the controller mounting part, and the microstrip antenna is arranged on the outer surface of the anti-interference intelligent microwave oven body, thereby reducing the influence of electromagnetic radiation on the microstrip antenna, and the radiation field of the microstrip antenna is less affected by the radiation of the anti-interference intelligent microwave oven, thereby solving the problem of electromagnetic wave radiation of the anti-interference intelligent microwave oven interfering with the wireless module when it is working.

[0049] Figure 3 is a schematic diagram of the structure of a microstrip antenna according to an exemplary embodiment. Figure 3 As shown, the microstrip antenna includes a ground layer 410 and a transmitting layer 420, wherein the ground layer 410 and the transmitting layer 420 are both formed by a PCB board.

[0050] The grounding layer 410 is provided with the grounding terminal (Ground, GND) of the wire, and the grounding layer 410 is connected to the outer side of the box 100. A feeding point 411 is provided on the grounding layer 410, and an isolation ring 412 is provided around the feeding point 411. The GND of the grounding layer 410 is connected to the GND of the feeder, and the feeding point 411 is used to be electrically connected to the core of the feeder. The isolation ring 412 is used to prevent the core of the feeder from short-circuiting when the feeder is used for connection.

[0051] The size of the ground layer 410 is determined by the size of the radiating element 421 and the thickness of the PCB board, wherein the length of the radiating element 421 and the length of the ground layer 410 satisfy:

[0052] L GND =L+6*h

[0053] Among them, L GND is the length of the ground layer 410, in millimeters

[0054] L is the length of the transmitter 421, in millimeters.

[0055] h is the thickness of the PCB board in millimeters.

[0056] The width of the radiating element 421 and the width of the ground layer 410 satisfy:

[0057] W GND =W+6*h

[0058] Among them, W GND is the width of the ground layer 410, in millimeters,

[0059] W is the width of the transmitter 421, in millimeters,

[0060] h is the thickness of the PCB board in millimeters.

[0061] The transmitting layer 420 is provided with a transmitting element 421, which is laid on the transmitting layer 420 and is electrically connected to the feeding point 411 for receiving and transmitting wireless signals. The transmitting element 421 is a quadrilateral, including a long side and a wide side, and the feeding point 411 is located on the midline of the wide side. It should be noted that the feeding point on the transmitting element is consistent with the feeding point position of the ground layer.

[0062] The size of the radiating element 421 is determined by the center frequency of the microstrip antenna, the dielectric constant and the thickness of the PCB board, wherein the width of the radiating element 421 satisfies:

[0063]

[0064] Wherein, W is the width of the emitting element 421,

[0065] c is the speed of light, and c = 300 × 10 9 mm / ns,

[0066] f0 is the center frequency of the microstrip antenna, and f0 = 22.45 GHz,

[0067] ε r is the dielectric constant of the PCB board.

[0068] The length of the launcher 421 satisfies:

[0069]

[0070]

[0071] Wherein, L is the length of the transmitting element 421,

[0072] L eff is the equivalent length,

[0073] ΔL is the equivalent slot width of the single-sided microstrip antenna,

[0074] ε r is the dielectric constant of the PCB board,

[0075] f0 is the center frequency of the microstrip antenna, and f0 = 22.45 GHz,

[0076] W is the width of the emitting element 421,

[0077] h is the thickness of the PCB board.

[0078] The feed point 411 is on the midline of the wide side, and the distance from the geometric center of the radiating element 421 satisfies:

[0079]

[0080] Among them, X f is the distance from the geometric center of the transmitter 421,

[0081] L is the length of the transmitter 421,

[0082] h is the thickness of the PCB board,

[0083] ε r is the dielectric constant of the PCB.

[0084] Based on the conditions satisfied by the above-mentioned dimensions of the transmitter 420 and the grounding layer 410, the dielectric constant of the PCB board ranges from 4.2 to 4.4, and the thickness of the PCB board ranges from 1.0 mm to 1.6 mm. The transmitter dimensions and feed point distances table in Table 1 and the grounding layer dimensions table in Table 2 can be obtained.

[0085] Table 1 Transmitter size and feed point distance

[0086]

[0087] Table 2 Ground plane dimensions

[0088]

[0089] As shown in Tables 1 and 2, the range of the length of the ground layer 410 is greater than or equal to 35 mm and less than or equal to 39.1 mm. The range of the width of the ground layer 410 is greater than or equal to 43 mm and less than or equal to 47.6 mm. The feed point 411 is located on the center line of the wide side of the radiating element 421, and the range of the distance from the geometric center of the radiating element 421 is greater than or equal to 7.14 mm and less than or equal to 7.52 mm.

[0090] Preferably, when the dielectric constant of the PCB is 4.3 and the thickness of the PCB is 1.0 mm, the width of the radiator 421 is 29.4 mm, and the length of the radiator 421 is 37.6 mm. The feed point 411 is on the midline of the wide side of the radiator 421 and is 7.3 mm away from the geometric center of the radiator 421. The width of the ground layer 410 is 35.4 mm, and the length of the ground layer 410 is 43.6 mm.

[0091] In the anti-interference intelligent microwave oven provided in the embodiment of the present application, the grounding layer of the microstrip antenna is connected to the outer side of the box body, and the size of the grounding layer is larger than the size of the emitting element, so that the grounding layer blocks or attenuates the microwave energy emitted by the magnetron of the anti-interference intelligent microwave oven, so that the signal of the emitting element of the emitting layer is not interfered, and the microstrip antenna can normally receive and send wireless signals.

[0092] In another embodiment, the box 100 further includes a shielding component 130 , which is disposed on the outer side of the box 100 and shields the emitting layer of the microstrip antenna. Figure 4 is a schematic diagram of a three-dimensional structure of a microstrip antenna according to an exemplary embodiment. Figure 4 As shown in the figure, the transmitting element adopts a microstrip patch antenna, so that the entire microstrip antenna is a low-profile microstrip antenna. The low-profile microstrip antenna is arranged on the outer surface of the box body 100. On the one hand, it does not occupy too much space of the box body. On the other hand, the microstrip antenna can be shielded by the shielding component 130, thereby maintaining the beautiful appearance of the anti-interference intelligent microwave oven.

[0093] The anti-interference intelligent microwave oven provided in the embodiment of the present application has a low-profile microstrip antenna. The microstrip antenna is arranged on the outer side of the box body. On the one hand, it does not occupy too much space of the box body, and on the other hand, it can be shielded by a shielding component, thereby not affecting the beautiful appearance of the anti-interference intelligent microwave oven.

[0094] To sum up, an anti-interference intelligent microwave oven provided in an embodiment of the present application, on the one hand, connects a wireless module to a microstrip antenna through a feeder line, and the microstrip antenna is arranged on the outer side of the anti-interference intelligent microwave oven, which reduces the influence of electromagnetic radiation on the microstrip antenna in terms of distance, and the grounding layer of the microstrip antenna is provided with a GND whose size is larger than that of the transmitting element, thereby blocking or attenuating the interference of electromagnetic radiation on the microstrip antenna, and on the other hand, the microstrip antenna is arranged with a low profile, which does not occupy the space on the outer side of the anti-interference intelligent microwave oven, and can be shielded by a shielding component, without affecting the aesthetics of the anti-interference intelligent microwave oven.

[0095] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. An anti-interference intelligent microwave oven, characterized in that: The anti-interference intelligent microwave oven comprises: A box body, the box body comprising a controller mounting portion; A wireless module is arranged on the controller mounting portion; and A microstrip antenna is arranged on the outer surface of the box and is electrically connected to the wireless module through a feeder; the microstrip antenna is used to receive wireless signals, and convert the received wireless signals into electrical signals and send them to the wireless module for processing, or convert the electrical signals sent by the wireless module into wireless signals and send them.

2. The anti-interference intelligent microwave oven according to claim 1, characterized in that: The microstrip antenna comprises a ground layer and a transmitting layer which are stacked; The grounding layer is used to be connected to the outer side of the box body and is provided with a feeding point, and the feeding point is electrically connected to the feeder line; The transmitting layer is provided with a transmitting element, and the transmitting element is electrically connected to the feeding point for receiving and transmitting the wireless signal.

3. The anti-interference intelligent microwave oven according to claim 2, characterized in that: The emitting element is laid on the emitting layer, and the length of the emitting element and the length of the grounding layer satisfy: L GND =L+6*h Among them, L GND is the length of the ground plane, in millimeters L is the length of the transmitter in millimeters, h is the thickness of the emission layer, in millimeters.

4. The anti-interference intelligent microwave oven according to claim 3, characterized in that: The length of the ground layer is greater than or equal to 35 mm and less than or equal to 39.1 mm.

5. The anti-interference intelligent microwave oven according to claim 2, characterized in that: The emitting element is laid on the emitting layer, and the width of the emitting element and the width of the grounding layer satisfy: W GND =W+6*h Among them, W GND is the width of the ground layer in millimeters, W is the width of the emitter, in millimeters, h is the thickness of the emission layer, in millimeters.

6. The anti-interference intelligent microwave oven according to claim 5, characterized in that: The width of the ground layer is greater than or equal to 43 mm and less than or equal to 47.6 mm.

7. The anti-interference intelligent microwave oven according to claim 2, characterized in that: The radiating element is a quadrilateral, including a long side and a wide side. The feeding point is located on the midline of the wide side, and the distance to the geometric center of the radiating element is greater than or equal to 7.14 mm and less than or equal to 7.52 mm.

8. The anti-interference intelligent microwave oven according to claim 1, characterized in that: The box body also includes a shielding component, which is arranged on the outer side of the box body and shields the emitting layer of the microstrip antenna.

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