Microwave oven

Abstract

The utility model discloses a microwave oven which comprises an oven body, a microwave oven body, a microwave oven body and a microwave oven body. The baking tray can be arranged in the cooking cavity or can be taken out from the cooking cavity, a control piece is formed on the baking tray, and when the baking tray is arranged in the cooking cavity, the control piece is close to the induction piece; the microwave oven further comprises a control system, the induction piece is connected with the control system, and when the induction piece sends out a signal indicating that the control piece is close to the microwave oven, the control system controls the microwave oven to stop the microwave function. According to the microwave oven, whether the baking tray is placed in the cooking cavity or not can be automatically detected, the microwave function is stopped when it is detected that the baking tray is placed in the cooking cavity, and the safety performance of the microwave oven is improved.

Description

Technical Field

[0001] The utility model relates to a cooking device, in particular to a microwave oven. Background Art

[0002] A microwave oven is a cooking device that combines microwave technology with traditional oven technology. It has the functions of microwave heating and grilling. It can complete various cooking methods such as heating, baking, and roasting ingredients in a shorter time while maintaining the nutrition and taste of the ingredients.

[0003] A baking tray is an essential component of a microwave oven, and existing baking trays are typically made of metal. A metal baking tray cannot be placed inside a microwave oven while it is in operation. This can cause shielding or sparking of the microwave oven, and in severe cases, even fire or explosion. Therefore, operating the microwave oven with a baking tray inside the oven presents a significant safety risk. Summary of the Invention

[0004] The purpose of the utility model is to provide a microwave oven that solves the above-mentioned safety risk problem existing in the prior art by automatically detecting whether a baking tray is placed in the oven.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A microwave oven, comprising:

[0007] A box body, the box body enclosing a cooking cavity, and an induction element formed on the box body;

[0008] a baking tray, the baking tray being placeable in or removable from the cooking cavity, the baking tray being provided with a control element, and when the baking tray is placed in the cooking cavity, the control element being close to the sensing element;

[0009] The control system is connected to the induction component, and when the induction component sends a signal indicating that the control component is approaching, the control system controls the microwave oven to stop the microwave function.

[0010] In some embodiments of the present application, the box body includes a left inner wall and a right inner wall, and the sensing element includes a first sensing element formed on the outside of the left inner wall of the box body and a second sensing element formed on the outside of the right inner wall of the box body.

[0011] In some embodiments of the present application, the baking tray includes a left side wall, a left flange, a right side wall and a right flange; the control member includes a first control member formed on the left side wall of the baking tray or the left flange of the baking tray and a second control member formed on the right side wall of the baking tray or the right flange of the baking tray.

[0012] In some embodiments of the present application, a boss supporting the baking tray is formed on the inner side wall of the box body, a through hole is formed on the boss, and the sensing element is located on the outer side of the inner side wall and at a position corresponding to the through hole.

[0013] In some embodiments of the present application, an open groove is formed on the bottom wall of the flange of the baking tray, and the control member is placed in the open groove. When the baking tray is placed in the cooking cavity, the control member corresponds to the position of the through hole.

[0014] In some embodiments of the present application, an elastic buckle is formed in the opening groove, and after the control component is placed in the opening groove, it is engaged with the elastic buckle.

[0015] In some embodiments of the present application, the sensing element is a reed switch or a Hall switch; and the control element is a magnet.

[0016] In some embodiments of the present application, the sensing element includes a first sensing end and a second sensing end, and when the sensing element senses that the control element is approaching, the first sensing end and the second sensing end are attracted to each other;

[0017] The control system includes a baking tray monitoring circuit, and the baking tray monitoring circuit includes:

[0018] a first controllable switch tube, wherein a control terminal of the first controllable switch tube is connected between the first sensing terminal and the high-level terminal of the induction element, a current outflow terminal of the first controllable switch tube is connected to the low-level terminal; and the second sensing terminal of the induction element is connected to the low-level terminal;

[0019] A second controllable switch tube, wherein the control end of the second controllable switch tube is connected to the current inflow end of the first controllable switch tube, the current inflow end of the second controllable switch tube is connected to the high level end, and the current outflow end of the second controllable switch tube is connected to the control circuit of the magnetron of the microwave oven.

[0020] In some embodiments of the present application, the control system also includes a main control circuit, and the current inflow end of the first controllable switch tube is also connected to the main control circuit. The main control circuit determines whether the baking tray is placed in the cooking cavity based on the level signal of the current inflow end of the first controllable switch tube.

[0021] In some embodiments of the present application, the microwave oven further includes a microwave function control switch, and the control system further includes:

[0022] a third controllable switch tube, wherein the control end of the third controllable switch tube is connected to the microwave function control switch, the current inflow end of the third controllable switch tube is connected to the current outflow end of the second controllable switch tube via the control circuit of the magnetron, and the current outflow end of the third controllable switch tube is connected to the low-level end.

[0023] Compared with the prior art, the advantages and positive effects of the present invention are:

[0024] The microwave oven provided by the utility model has a sensing element formed on the box body and a control element formed on the baking tray. The sensing element is connected to the control system of the microwave oven. When the baking tray is placed in the cooking cavity, the control element approaches the sensing element, and the sensing element sends a signal indicating that the control element is approaching to the control system, which controls the microwave oven to stop the microwave function. Therefore, the control element, the sensing element and the control system can automatically detect whether the baking tray is placed in the cooking cavity, and stop the microwave function when it is detected that the baking tray is placed in the cooking cavity. This achieves the goal of not executing the microwave function when the baking tray, which is usually made of metal, is placed in the cooking cavity, effectively avoiding problems such as shielding, ignition, fire, explosion, etc. in the microwave oven, and improving the safety performance of the microwave oven.

[0025] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, a brief introduction will be given below to the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of a microwave oven provided by the present invention;

[0028] Figure 2 yes Figure 1 Cross-sectional view of part of the structure;

[0029] Figure 3 yes Figure 1 Enlarged view of part A in the middle;

[0030] Figure 4 yes Figure 1 A three-dimensional diagram of the box in FIG.

[0031] Figure 5 yes Figure 4 Enlarged view of middle part B;

[0032] Figure 6 yes Figure 1 A three-dimensional image of a baking tray;

[0033] Figure 7 yes Figure 6 Exploded view of the baking pan;

[0034] Figure 8 yes Figure 7 Enlarged view of the middle C section;

[0035] Figure 9 This is a partial circuit principle diagram of an embodiment of a microwave oven provided by the utility model.

[0036] In the above drawings, the reference numerals and their corresponding component names are as follows:

[0037] 10. Box body; 11. Left inner wall; 12. Right inner wall; 13. Boss; 131. Through hole;

[0038] 20. Cooking cavity;

[0039] 30. Baking tray; 31. Left side wall; 32. Left flange; 33. Right flange; 331. Opening slot; 332. Elastic buckle;

[0040] 40. Induction parts;

[0041] 50. Control parts. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0043] It should be noted that, in the description of the present invention, terms such as "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0044] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature identified as "first," "second," or "third" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0045] In this utility model, unless otherwise specified or limited, the term "connection" and the like should be understood in a broad sense. For example, it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0046] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0047] Figures 1 to 8 The embodiment of the microwave oven provided by the present invention is shown. Figure 1 is a schematic diagram of the three-dimensional structure of the microwave oven of this embodiment, Figure 2 yes Figure 1 Cross-sectional view of some structures, Figure 3 yes Figure 1 The enlarged view of the middle A part, Figure 4 yes Figure 1 A three-dimensional diagram of the box, Figure 5 yes Figure 4 The enlarged view of part B in the middle. Figure 6 and Figure 7 They are Figure 1 The three-dimensional and exploded views of the baking tray in Figure 8 yes Figure 7 Enlarged view of part C in the middle.

[0048] See also Figures 1 to 8 As shown, the microwave oven of this embodiment includes a cabinet 10 , a baking tray 30 and a control system. The cabinet 10 encloses a cooking cavity 20 , and the baking tray 30 can be placed in the cooking cavity 20 or taken out of the cooking cavity 20 .

[0049] The housing 10 is typically constructed of inner and outer walls, with an opening at the front. The inner wall defines a cooking cavity 20. A baking tray 30 is placed into and removed from the cooking cavity 20 through the opening. Typically, when the microwave oven is baking, the ingredients to be baked are placed in the baking tray 30, which is then placed inside the cooking cavity 20 along with the ingredients. The baking tray 30 must not be placed inside the cooking cavity 20 during the microwave oven operation to avoid safety concerns.

[0050] The control system is the main control body of the microwave oven. It controls the operation of the heating components in the microwave oven automatically or according to user settings, and performs functions such as baking, heating, and roasting.

[0051] The microwave oven of this embodiment further includes a baking tray detection mechanism for automatically detecting whether a baking tray 30 is placed in the cooking cavity 20 .

[0052] Specifically, a sensor 40 is formed on the housing 10, and a control member 50 is formed on the baking tray 30. The control member 50 is connected to the control system. When the baking tray 30 is placed in the cooking cavity 20, the control member 50 approaches the sensor 40. The sensor 40 senses the proximity of the control member 50 and sends a signal indicating the proximity of the control member 50. The control system receives this signal, indicating that it has detected the presence of the baking tray 30 in the cooking cavity 20, and then controls the microwave oven to stop the microwave function.

[0053] This embodiment does not limit the specific structure of the sensing element 40 and the control element 50. All sensing elements that can be set on the box body 10, all control elements that can be set on the baking tray, and all sensing elements and control elements that can be close to the sensing element when the baking tray is placed in the cooking cavity and the sensing element can sense the approach of the control element and send the approach signal to the control system, all fall within the scope of protection of the present utility model.

[0054] In some embodiments, the sensing element 40 is a reed switch or a Hall switch; correspondingly, the control element 50 is a magnet.

[0055] It should be understood that if the user has selected or the microwave oven automatically determines that it wants to execute the microwave function of the microwave oven, when the control system receives the signal emitted by the sensor 40 that the control member 50 is approaching, that is, when it detects that there is a baking pan 30 in the cooking cavity 20, the control system will control the microwave function of the microwave oven not to start; if the control system receives the signal emitted by the sensor 40 that the control member 50 is approaching, that is, when it detects that there is a baking pan 30 in the cooking cavity 20, and the microwave oven is executing a grilling function or other non-microwave function, the control system will not control the microwave oven to execute the microwave function, and the microwave function will also be stopped; or, although the control system detects the presence of the baking pan 30 in the cooking cavity 20 through the signal emitted by the sensor 40 that the control member 50 is approaching, the microwave oven is not executing any heating function at this time, and the microwave function is also stopped at this time.

[0056] The microwave oven of this embodiment has a sensor 40 formed on the housing 10 and a control unit 50 formed on the baking tray 30. The sensor 40 is connected to the microwave oven's control system. When the baking tray 30 is placed in the cooking cavity 20, the control unit 50 approaches the sensor 40. The sensor 40 sends a signal indicating the proximity of the control unit 50 to the control system, which in turn controls the microwave oven to deactivate the microwave function. Thus, the control unit 50, the sensor 40, and the control system automatically detect whether the baking tray 30 is placed in the cooking cavity 20 and deactivate the microwave function when such detection is made. This prevents the microwave oven from operating when the baking tray 30, typically made of metal, is placed in the cooking cavity 20. This effectively prevents shielding, sparking, ignition, and explosion issues, thereby improving the safety of the microwave oven.

[0057] In some embodiments, the box body 10 includes a left inner wall 11 and a right inner wall 12 , and the sensing element 40 includes a first sensing element formed on the outer side of the left inner wall 11 and a second sensing element formed on the outer side of the right inner wall 12 .

[0058] By positioning the sensor 40 outside the inner sidewall, it is not within the cooking cavity 20, thus preventing damage to the sensor from the high temperature environment within the cooking cavity 20 and thus affecting the induction detection effect. By positioning a sensor 40 on the outer side of the left inner sidewall 11 and the outer side of the right inner sidewall 12 of the housing 10, and positioning a control member 50 on only the left or right side of the grilling pan 30, regardless of the orientation of the grilling pan 30 within the cooking cavity 20, the proximity of one of the sensor members 40 on the housing 10 to the control member 50 can generate a sensed signal, thereby improving detection accuracy and simplifying the placement requirements for the grilling pan 30.

[0059] In some other embodiments, the baking tray 30 includes a left side wall 31, a left flange 32, a right side wall (not marked in the figure) and a right flange 33, and the control member 50 includes a first control member and a second control member, the first control member is formed on the left side wall 31 or on the left flange 32, and the second control member is formed on the right side wall or on the right flange 33.

[0060] By positioning the control member 50 on the side wall or flange of the baking tray 30, when the baking tray 30 is placed in the cooking cavity 20, the side wall or flange of the baking tray 30 is close to the side wall of the cabinet 10, allowing the control member 50 to approach the sensor 40 provided on the side wall of the cabinet 10, thereby utilizing the sensor 40 to output a sensing signal indicating that the baking tray 30 is within the cooking cavity 20. By positioning the first control member on the left side wall 31 or left flange 32 of the baking tray 30 and the second control member on the right side wall or right flange 33 of the baking tray 30, when only one sensor 40 is provided on one side of the cabinet 10, the sensor 40 can approach one of the control members 50 and sense a signal regardless of the orientation of the baking tray 30 within the cooking cavity 20, thereby improving detection accuracy and simplifying the placement requirements for the baking tray 30.

[0061] In other embodiments, a sensing element 40 is provided on the outer side of the left inner wall 11 and the outer side of the right inner wall 12 of the housing 10, a first control element is provided on the left side wall 31 or the left flange 32 of the baking tray 30, and a second control element is provided on the right side wall or the right flange 33 of the baking tray 30. By providing two sensing elements 40 on the housing 10 and two control elements 50 on the baking tray 30, multiple sensing detection points are formed. This eliminates the need to consider the placement orientation of the baking trays, simplifies the placement requirements of the baking trays 30, and allows the use of another sensing element for sensing detection if one sensing element is damaged, thereby improving detection accuracy and preventing interference.

[0062] In some other embodiments, a boss 13 for supporting the baking tray 30 is formed on one of the inner side walls of the housing 10, for example, the right inner side wall 12. A through hole 131 is formed on the boss 13. The sensor 40 is disposed on the outer side of the right inner side wall 12 at a position corresponding to the through hole 131. The sensor 40 can be mounted on the outer side of the right inner side wall 12 directly or via a bracket.

[0063] An opening slot 331 is formed on one of the flanges of the baking tray 30, for example, on the bottom wall of the right flange 33, and the control member 50 is disposed in the opening slot 331. When the baking tray 30 is placed in the cooking cavity 20 and supported on the boss 13, the control member 50 is aligned with the through hole 131.

[0064] Thus, the sensing member 40 and the control member 50 correspond to each other through the through hole 131 , and the through hole 131 is utilized to enable the sensing member 40 to quickly, accurately and stably sense the approach of the control member 50 .

[0065] In some other embodiments, an elastic snap 332 is formed in the opening slot 331. Once the control member 50 is placed in the opening slot 331, it engages with the elastic snap 332, thereby firmly securing the control member 50 in the opening slot 331 and preventing it from falling out. When installing or removing the control member 50, applying a certain external force allows the elastic snap 332 to deform and conveniently remove the control member 50.

[0066] The above limitations do not apply to the setting position, configuration quantity, assembly method, etc. of the sensing component 40 in the box body 10, and the setting quantity, setting position, assembly method, etc. of the control component 50 set on the baking tray 30. All other quantities and positions that can realize automatic detection of the baking tray fall within the scope of protection of the present utility model.

[0067] Figure 9 Shown is a partial circuit schematic diagram of the microwave oven provided by the utility model.

[0068] like Figure 9 As shown, in these embodiments, the sensing element M has a first sensing end 1 and a second sensing end 2. When the sensing element M senses the approach of the control element, the first sensing end 1 and the second sensing end 2 are attracted to each other to form a passage; if the sensing element M does not sense the approach of the control element, the first sensing end 1 and the second sensing end 2 are disconnected and out of contact.

[0069] The control system includes a main control circuit, a magnetron control circuit and a baking tray monitoring circuit, wherein the baking tray monitoring circuit includes a first controllable switch tube Q1 and a second controllable switch tube Q2.

[0070] The first controllable switch Q1 has a control terminal B, a current inflow terminal C, and a current outflow terminal E. The control terminal B of Q1 is connected between the first sensing terminal 1 of the induction element M and the high-level terminal VCC, either directly or through a resistor R4. The second sensing terminal 2 of the induction element M is connected to the low-level terminal GND, either directly or through a resistor R7. The first sensing terminal 1 of the induction element M is connected to the high-level terminal VCC, either directly or through a resistor R1. The current outflow terminal E of Q1 is connected to the low-level terminal GND and is further connected to its control terminal B via a resistor R5.

[0071] The second controllable switch Q2 has a control terminal G, a current inflow terminal S, and a current outflow terminal D. The control terminal G of Q2 is connected directly or via a resistor R3 to the current inflow terminal C of the first controllable switch Q1. The current inflow terminal S of Q2 is connected directly or via a resistor R2 to the high-level terminal VCC. The current outflow terminal D of Q2 is connected to the control circuit of the magnetron, specifically to the coil J of a relay in the control circuit of the magnetron.

[0072] The current inflow terminal C of the first controllable switch tube Q1 also leads to a detection terminal T, which is connected to the main control circuit of the control system. The control system can determine whether the baking tray is placed in the cooking cavity through the level signal of the detection terminal T.

[0073] In some other embodiments, the microwave oven further includes a microwave function control switch W, and the control system further includes a third controllable switch Q3. The first controllable switch Q3 has a control terminal B, a current inflow terminal C, and a current outflow terminal E. The control terminal B of Q3 is connected to the microwave function control switch W directly or through a resistor R6. The current inflow terminal C of Q3 is connected to the current outflow terminal D of the second controllable switch Q2 via the coil J of a relay in the magnetron control circuit. The current outflow terminal E of Q3 is connected to the low-level terminal GND.

[0074] In this embodiment, the first controllable switch transistor Q1 and the third controllable switch transistor Q3 are NPN transistors, and the second controllable switch transistor Q2 is a PMOS transistor. In other embodiments, each controllable switch transistor may be implemented using other types of switch transistors, and is not limited to the NPN transistors and PMOS transistors of this embodiment.

[0075] Combined with the above circuit schematic, the process of realizing the baking tray monitoring function of the microwave oven is described as follows:

[0076] When the baking tray is not placed in the cooking cavity, the sensor M does not sense any approach of the control component, and its first sensing terminal 1 and second sensing terminal 2 are in a disconnected and non-contact state. The control terminal B of the first controllable switch tube Q1 is at a high level, the first controllable switch tube Q1 is turned on, the current inflow terminal C of Q1 is at a low level, and the second controllable switch tube Q2 is turned on.

[0077] In this state, the microwave function control switch W can control the on / off state of the third controllable switch Q3, thereby controlling the microwave function through the magnetron's control circuit. When the microwave function control switch W is at a high level, activating the microwave function, the third controllable switch Q3 conducts, energizing the coil J of the relay in the magnetron's control circuit, closing the relay's switch K, and operating the magnetron, thus performing the microwave function. When the microwave function control switch W is at a low level, activating the microwave function, the third controllable switch Q3 turns off, de-energizing the coil J of the relay in the magnetron's control circuit, opening the relay's switch K, and shutting down the magnetron, thereby stopping the microwave function.

[0078] At the same time, since the current inflow terminal C of Q1 is at a low level, the detection terminal T connected to the main control circuit is also at a low level. The main control circuit can determine that the baking tray is not placed in the cooking cavity through the level state of the detection terminal T.

[0079] When the baking tray is placed in the cooking cavity, the induction element M senses the approach of the control element, and its first induction terminal 1 and second induction terminal 2 attract each other to form a pathway. The control terminal B of the first controllable switch tube Q1 is at a low level, the first controllable switch tube Q1 is turned off, the current inflow terminal C of Q1 is at a high level, and the second controllable switch tube Q2 is turned off.

[0080] In this state, because the second controllable switch Q2 is off, the third controllable switch Q3 cannot conduct, regardless of whether the microwave function control switch W is at a high level (activating the microwave function) or at a low level. Consequently, coil J of the relay in the magnetron's control circuit receives no power, rendering the magnetron inoperable and the microwave function inactive. This prevents the magnetron from erroneously activating due to misoperation of the microwave function control switch, improving the microwave oven's anti-interference capability.

[0081] At the same time, since the current inflow terminal C of Q1 is at a high level, the detection terminal T connected to the main control circuit is also at a high level. The main control circuit can determine that the baking tray is placed in the cooking cavity through the level state of the detection terminal T.

[0082] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A microwave oven, characterized in that: include: A box body, the box body enclosing a cooking cavity, and an induction element formed on the box body; a baking tray, the baking tray being placeable in or removable from the cooking cavity, the baking tray being provided with a control element, and when the baking tray is placed in the cooking cavity, the control element being close to the sensing element; The control system is connected to the induction component, and when the induction component sends a signal indicating that the control component is approaching, the control system controls the microwave oven to stop the microwave function.

2. The microwave oven according to claim 1, wherein: The box body includes a left inner wall and a right inner wall, and the sensing element includes a first sensing element formed on the outer side of the left inner wall of the box body and a second sensing element formed on the outer side of the right inner wall of the box body.

3. The microwave oven according to claim 1, wherein: The baking tray includes a left side wall, a left flange, a right side wall and a right flange; the control member includes a first control member formed on the left side wall of the baking tray or the left flange of the baking tray and a second control member formed on the right side wall of the baking tray or the right flange of the baking tray.

4. The microwave oven according to claim 1, wherein: A boss for supporting the baking tray is formed on the inner side wall of the box body, a through hole is formed on the boss, and the sensing element is located on the outer side of the inner side wall and at a position corresponding to the through hole.

5. The microwave oven according to claim 4, characterized in that: An open groove is formed on the bottom wall of the flange of the baking tray, and the control member is placed in the open groove. When the baking tray is placed in the cooking cavity, the control member corresponds to the position of the through hole.

6. The microwave oven according to claim 5, characterized in that: An elastic buckle is formed in the opening slot, and after the control component is placed in the opening slot, it is engaged with the elastic buckle.

7. The microwave oven according to any one of claims 1 to 6, characterized in that The induction element is a reed switch or a Hall switch; the control element is a magnet.

8. The microwave oven according to any one of claims 1 to 6, characterized in that The sensing element comprises a first sensing end and a second sensing end, and when the sensing element senses that the control element is approaching, the first sensing end and the second sensing end are attracted to each other; The control system includes a baking tray monitoring circuit, and the baking tray monitoring circuit includes: a first controllable switch tube, wherein a control terminal of the first controllable switch tube is connected between the first sensing terminal and the high-level terminal of the induction element, a current outflow terminal of the first controllable switch tube is connected to the low-level terminal; and the second sensing terminal of the induction element is connected to the low-level terminal; A second controllable switch tube, wherein the control end of the second controllable switch tube is connected to the current inflow end of the first controllable switch tube, the current inflow end of the second controllable switch tube is connected to the high level end, and the current outflow end of the second controllable switch tube is connected to the control circuit of the magnetron of the microwave oven.

9. The microwave oven according to claim 8, characterized in that: The control system also includes a main control circuit, and the current inflow end of the first controllable switch tube is also connected to the main control circuit. The main control circuit determines whether the baking tray is placed in the cooking cavity based on the level signal of the current inflow end of the first controllable switch tube.

10. The microwave oven according to claim 8, characterized in that: The microwave oven further includes a microwave function control switch, and the control system further includes: a third controllable switch tube, wherein the control end of the third controllable switch tube is connected to the microwave function control switch, the current inflow end of the third controllable switch tube is connected to the current outflow end of the second controllable switch tube via the control circuit of the magnetron, and the current outflow end of the third controllable switch tube is connected to the low-level end.

Images