Multi-zone cooking microwave oven

Abstract

The present invention relates to the field of cooking utensils, and discloses a microwave oven capable of cooking in multiple zones, comprising a cavity assembly, a waveguide assembly, a segmentation structure, a microwave distribution device, and a sensor assembly. The cavity assembly comprises a cooking cavity and a magnetron fixed to the outer wall of the cooking cavity; the waveguide assembly comprises a first waveguide and a second waveguide; the segmentation structure comprises a first partition plate and a second partition plate, which can separate the cooking cavity into a first cooking chamber, a second cooking chamber, and a third cooking chamber, and the microwave distribution device can control the strength of the microwave introduced into different cooking chambers; the sensor assembly comprises a first smoke sensor, a second smoke sensor, and a photoelectric sensor, which can detect whether the segmentation structure is installed and whether the food in the second cooking chamber and the third cooking chamber is cooked. The microwaves in the cooking cavity of the microwave oven are evenly distributed. After the segmentation structure is installed, different foods can be cooked simultaneously in different cooking chambers, and better cooking effects can be achieved.

Description

Technical Field

[0001] The invention relates to the field of cooking utensils, and in particular to a microwave oven capable of cooking in multiple zones. Background Art

[0002] Traditional microwave ovens have only one cooking chamber, using one microwave generator to introduce microwaves into the cooking chamber through a waveguide to heat food. Traditional microwave ovens have the following disadvantages: 1. Only one type of food can be cooked at a time. When there are multiple types of food to be cooked, they can only be cooked one by one, which is very inconvenient. Cooking several types of food together will cause uneven heating of the food. 2. The microwaves in the cooking chamber are uneven, causing uneven cooking and thawing of food. One part of the food is already very hot, while the other part is cold. 3. The microwave utilization efficiency is poor. Only one piece of food can be placed in the entire cooking chamber, and it may not be placed in the strongest microwave area, which affects the cooking effect.

[0003] In order to improve the uniformity of microwaves in the cooking chamber, different forms of microwave stirring blades have appeared recently. They are installed at the feed port of the waveguide to improve the uniformity of microwaves in the cooking chamber. However, due to the limitations of the shape of the cooking chamber and the position of the microwave feed port of the waveguide, the uniformity of microwaves in the microwave oven is still not ideal.

[0004] In July 2014, Li Changlin designed a microwave oven (authorization announcement number: CN 203964055 U), which divided multiple cooking zones on the bottom plate, determined the cooking zone with the strongest microwave in each mode through experiments, and gave prompts with indicator lights so that food can be placed in the cooking zone with the strongest microwave for cooking, thereby improving the cooking effect. However, this solution only utilizes the unevenness of microwaves in the cooking chamber of the microwave oven, and cannot change the phenomenon of uneven microwaves. In December 2017, Li Guofeng and others designed a microwave oven (application publication number: CN 107911895 A), which adjusts the size of the cooking space by adjusting the position of the adjustment plate set in the cooking chamber to improve the utilization rate of microwaves in the cooking chamber. However, this solution causes a waste of cooking space.

[0005] However, there is no better solution to the shortcoming that microwave ovens can only cook one type of food at a time. Summary of the invention

[0006] The purpose of the present invention is to overcome the problems in the prior art that the microwave oven cooking chamber has poor microwave uniformity, low microwave utilization rate, and can only cook one kind of food at a time, and to provide a multi-zone cooking microwave oven, which has the advantages of being able to divide the cooking chamber into multiple cooking zones for cooking different foods, having good microwave uniformity, and high microwave utilization rate.

[0007] In order to achieve the above object, the present invention provides a multi-zone cooking microwave oven, comprising a cavity assembly and a waveguide assembly.

[0008] The cavity assembly includes a cooking cavity and a magnetron fixed on the outer wall of the cooking cavity, and a positioning component for installing a dividing component is provided on the inner surface of the cooking cavity, and the dividing component is used to partition the cooking cavity; the waveguide assembly includes a first waveguide and a second waveguide, and the microwave feeding ports of the first waveguide and the second waveguide are arranged on two of the inner top surface, the inner bottom surface and the inner side wall of the cooking cavity, and are used to introduce the microwaves generated by the magnetron into the cooking cavity from different directions.

[0009] Preferably, the positioning member comprises a pair of slots respectively arranged on the top surface and the bottom surface of the cooking cavity. The dividing structure comprises a first partition plate, which is embedded in the slots to divide the cooking cavity into a first cooking chamber and a right cooking chamber.

[0010] Preferably, the positioning member further comprises a first support plate fixed to the inner side wall of the cooking cavity, and a second support plate is provided on a side of the first partition plate opposite to the first support plate. The dividing structure further comprises a second partition plate, and two ends of the second partition plate are respectively placed on the first support plate and the second support plate, and the second partition plate divides the right cooking chamber into a second cooking chamber and a third cooking chamber.

[0011] Preferably, the microwave energy generated by the magnetron is introduced into the first waveguide and the second waveguide respectively in a certain ratio, and the energy introduced into the first waveguide is not less than the energy introduced into the second waveguide.

[0012] Further preferably, the ratio of the energy introduced into the first waveguide to the energy introduced into the second waveguide is 6:4 or 7:3.

[0013] Preferably, the second waveguide tube is provided with a microwave distribution device, including a stepper motor, a rotating shaft, and a microwave on-off plate. The output shaft of the stepper motor is connected to the rotating shaft, and the rotating shaft extends into the second waveguide tube to drive the microwave on-off plate to rotate to open or close the microwave inlet of the second waveguide tube.

[0014] Preferably, a first microwave stirring blade and a second microwave stirring blade are respectively provided at the microwave feeding inlets of the first waveguide tube and the second waveguide tube.

[0015] Preferably, the microwave feeding port of the first waveguide tube is arranged on the inner bottom surface of the cooking cavity, and the microwave feeding port of the second waveguide tube is arranged on the inner top surface of the cooking cavity.

[0016] Preferably, a first smoke sensor is arranged on the top corresponding to the second cooking chamber; and a second smoke sensor is arranged on the side wall corresponding to the third cooking chamber.

[0017] Preferably, a photoelectric sensor is provided at the top of the cooking cavity for detecting the partition status of the cooking cavity; if it is detected that the cooking cavity has multiple partitions, the multi-partition working mode is started; otherwise, the single-partition working mode is maintained.

[0018] A microwave distribution device similar to the second waveguide may also be installed on the first waveguide, which, in conjunction with the microwave distribution device installed on the second waveguide, can more conveniently control microwaves entering the first waveguide and / or the second waveguide.

[0019] By changing the control mode of the microwave distribution device, the microwave on-off plate can also be controlled to stop at any possible position to arbitrarily control the size of the microwave inlet, and the amount of microwaves entering the first waveguide tube and the second waveguide tube can be more flexibly controlled.

[0020] Through the above technical solution, the microwave oven capable of multi-zone cooking of the present invention, when the partition structure is not installed, has a more uniform distribution of microwaves in the cooking cavity, especially for larger foods, and has better cooking and thawing effects. After the partition structure is installed, the cooking cavity can be divided into two or three cooking chambers, and different cooking chambers have different microwave intensities, and different foods can be cooked at the same time, and the cooking conditions of foods in different cooking chambers can be monitored and adjusted, so that different foods can achieve better cooking effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of a microwave oven capable of zoned cooking;

[0022] Figure 2 It is a schematic diagram of zone control of a microwave oven capable of zoned cooking;

[0023] Figure 3 yes Figure 2 A partial enlarged view of part A.

[0024] Description of Reference Numerals

[0025] DETAILED DESCRIPTION

[0026] In the present invention, unless otherwise stated, the directions or positional relationships indicated by the directional words such as “up, down, left, right” are based on the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships of the described devices or components in actual use.

[0027] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and the protection scope of the present invention is not limited to the following specific embodiments.

[0028] like Figure 1 As shown, one embodiment of the microwave oven capable of multi-zone cooking of the present invention comprises a cavity assembly 1, a waveguide assembly, a partition structure and a sensor assembly.

[0029] The cavity assembly 1 comprises a cooking cavity 100 of a rectangular shape and a magnetron 6 fixed to the outer wall of the cooking cavity 100. Slots 101 are respectively provided on the inner top and bottom surfaces of the cooking cavity 100, and first support plates 102 are respectively provided on the left and right inner sides.

[0030] The waveguide assembly includes a first waveguide 7a whose microwave feed inlet is located at the bottom surface of the cooking cavity 100 and a second waveguide 7b whose microwave feed inlet is located at the top surface of the cooking cavity 100. The microwaves generated by the magnetron 6 can be introduced into the cooking cavity 100 from two different directions, the bottom surface and the top surface; by setting the installation position of the waveguide assembly and the magnetron 6, the energy ratio of the microwaves generated by the magnetron 6 entering the first waveguide 7a and entering the second waveguide 7b is 6:4. The first microwave stirring blade 8a and the second microwave stirring blade 8b are respectively arranged at the microwave feed inlets of the first waveguide 7a and the second waveguide 7b, which are used to stir the microwaves so that the microwaves entering the cooking cavity 100 are evenly distributed in the cooking cavity 100.

[0031] like Figure 2 As shown, the partition structure includes a first partition 9 and a second partition 10. The upper and lower sides of the first partition 9 are installed in the slot 101; one side of the first partition 9 is provided with a second support plate 91, and the two ends of the second partition 10 are placed on the second support plate 91 and the first support plate 102 respectively. After the first partition 9 and the second partition 10 are installed, the cooking cavity 100 is divided into three cooking chambers: a first cooking chamber 200a, a second cooking chamber 200b and a third cooking chamber 200c. The partition structure can be removed to restore the single cooking cavity 100.

[0032] like Figure 3 As shown, a microwave distribution device is provided at the microwave introduction port k of the second waveguide 7b. The microwave distribution device comprises a stepping motor 4, a rotating shaft 5 and a microwave on-off plate 12; the output shaft of the stepping motor 4 is connected to the rotating shaft 5, and the rotating shaft 5 extends into the second waveguide 7b to drive the microwave on-off plate 12 to rotate so as to open or close the microwave introduction port k of the second waveguide.

[0033] The sensor assembly includes a photoelectric sensor 2, a first smoke sensor 3a and a second smoke sensor 3b. The photoelectric sensor 2 is installed on the top right side of the cooking cavity 100 and is covered by a photoelectric sensor cover 11, and is used to detect the partition state of the cooking cavity 100. The photoelectric sensor cover 11 can prevent external light from interfering with the sensor 2. The first smoke sensor 3a is installed at the upper right corner of the cooking cavity 100 and the upper part of the second cooking chamber 200b in a multi-partition state, and is used to detect the smoke generated when the food in the second cooking chamber 200b is cooked, so as to determine whether the cooking of the food in the second cooking chamber 200b is completed.

[0034] The second smoke sensor 3b is installed on the right side wall of the cooking cavity 100 and in the third cooking chamber 200c in a multi-partition state, and is used to detect the smoke generated when the food in the third cooking chamber 200c is cooked to determine whether the cooking of the food in the third cooking chamber 200c is completed.

[0035] When the multi-zone cooking microwave oven is working, the photoelectric sensor 2 detects the zone state of the cooking cavity 100. If the cooking cavity 100 is in a single zone state, the multi-zone cooking microwave oven works normally, and microwaves enter the cooking cavity 100 from the first waveguide 7a and the second waveguide 7b at a ratio of 6:4. Since microwaves enter the cooking cavity 100 from the inner bottom surface and the inner top surface of the cooking cavity 100 at the same time, coupled with the stirring effect of the first microwave stirring blade 8a and the second microwave stirring blade 8b, the microwave distribution in the cooking cavity 100 is more uniform. Compared with ordinary microwave ovens, it has a better cooking effect. If the cooking cavity 100 is in a two-partition state, that is, the cooking cavity 100 is only divided into a first cooking chamber 200a and a right cooking chamber by the first partition 9, the working mode of the multi-partition cooking microwave oven is the same as that of the single-partition state, but because the first partition 9 divides the cooking cavity 100 into two cooking chambers of different sizes, and the microwave feed port is relatively arranged in the middle of the cooking cavity 100, the microwave intensity in the first cooking chamber 200a is relatively weak, which is suitable for heating some beverages and other foods, and the microwave intensity in the right cooking chamber is relatively strong, which is suitable for cooking foods that require stronger firepower.

[0036] If the photoelectric sensor 2 detects that the cooking cavity 100 is in a multi-partition state, that is, the cooking cavity 100 is divided into three cooking chambers. At this time, the microwaves in the first cooking chamber 200a are fed by the edges of the microwave feed ports of the first waveguide 7a and the second waveguide 7b, and the microwave power is relatively small, which is suitable for heating milk, coffee, etc. The microwaves in the second cooking chamber 200b are fed by the second waveguide 7b, and the microwave power is intermediate, which can be used to cook vegetables and other foods. The microwaves in the third cooking chamber 200c are fed by the first waveguide 7a, and the microwave power is relatively high, which can be used to cook meat and other foods. At the same time, the first smoke sensor 3a detects the smoke in the second cooking chamber 200b. When the food in the second cooking chamber 200b is cooked, the first smoke sensor 3a triggers the stepper motor 4 to work, driving the microwave on-off plate 12 to rotate to the position of the microwave on-off plate closed state 12b (such as Figure 3 ), the microwave introduction port k of the second waveguide 7b is closed, and the microwaves generated by the magnetron 6 all enter the first waveguide 7a to cook the food in the third cooking chamber 200c. After the cooking is completed, the stepper motor 4 works to drive the microwave on-off plate 12 to rotate to the position of the microwave on-off plate opening state 12a, and reopen the microwave introduction port k of the second waveguide 7b.

[0037] The multi-zone cooking microwave oven of the present invention can also be provided with a similar microwave distribution device at the microwave inlet of the first waveguide 7a, so that when the food in the third cooking chamber 200c is cooked in the zone cooking state, the food in the second cooking chamber 200b can be cooked with concentrated fire.

[0038] By changing the working mode of the stepper motor 4, the microwave on-off plate 12 can also be rotated to any position between 12a and 12b. Combined with different working menus of the microwave oven, the firepower distribution in the second cooking chamber 200b and the third cooking chamber 200c can be adjusted in real time during the processing, so that the cooking effect of different foods is more ideal.

[0039] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, for example, the opening and closing form of the microwave introduction port of the waveguide can be changed, including the combination of various specific technical features in any appropriate manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A microwave oven capable of cooking in multiple zones, characterized in that: including a cavity assembly and a waveguide assembly; The cavity assembly comprises a cooking cavity and a magnetron fixed on the outer wall of the cooking cavity; The inner surface of the cooking cavity is provided with a positioning member for installing a partition structure, the partition structure is used to partition the cooking cavity, the partition structure includes a first partition and a second partition, the first partition divides the cooking cavity into a first cooking chamber and a right cooking chamber; The positioning member comprises a first support plate fixed to the inner side wall of the cooking cavity, a second support plate is provided on a side of the first partition plate opposite to the first support plate, two ends of the second partition plate are respectively placed on the first support plate and the second support plate, and the second partition plate divides the right cooking chamber into a second cooking chamber and a third cooking chamber; The waveguide assembly comprises a first waveguide and a second waveguide, and the microwave energy generated by the magnetron is introduced into the first waveguide and the second waveguide respectively in a certain proportion, and the energy introduced into the first waveguide is not less than the energy introduced into the second waveguide; The microwave feeding port of the first waveguide is arranged on the inner bottom surface of the cooking cavity, and the microwave feeding port of the second waveguide is arranged on the inner top surface of the cooking cavity, and is used to introduce the microwaves generated by the magnetron into the cooking cavity from different directions. The microwaves in the first cooking chamber are fed into the cooking cavity by the edges of the microwave feeding ports of the first waveguide and the second waveguide, the microwaves in the second cooking chamber are fed into the second waveguide, and the microwaves in the third cooking chamber are fed into the first waveguide.

2. The multi-zone cooking microwave oven according to claim 1, characterized in that: The positioning component also includes a pair of slots respectively arranged on the top surface and the bottom surface of the cooking cavity, and the first partition is embedded in the slots.

3. The multi-zone cooking microwave oven according to claim 1, characterized in that: The ratio of energy introduced into the first waveguide to energy introduced into the second waveguide is 6:4 or 7:

3.

4. The multi-zone cooking microwave oven according to claim 1, characterized in that: The second waveguide tube is provided with a microwave distribution device, including a stepper motor, a rotating shaft and a microwave on-off plate. The output shaft of the stepper motor is connected to the rotating shaft. The rotating shaft extends into the second waveguide tube to drive the microwave on-off plate to rotate so as to open or close the microwave introduction port of the second waveguide tube.

5. The multi-zone cooking microwave oven according to claim 1, characterized in that: A first microwave stirring blade and a second microwave stirring blade are respectively arranged at the microwave feeding inlets of the first waveguide tube and the second waveguide tube.

6. The multi-zone cooking microwave oven according to claim 2, characterized in that: A first smoke sensor is arranged on the top corresponding to the second cooking chamber; and a second smoke sensor is arranged on the side wall corresponding to the third cooking chamber.

7. The multi-zone cooking microwave oven according to claim 1, characterized in that: A photoelectric sensor is provided on the top of the cooking cavity for detecting the partition state of the cooking cavity; If it is detected that the cooking cavity has multiple partitions, the multi-partition working mode is started; otherwise, the single-partition working mode is maintained.

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