A steamer, oven and microwave oven all-in-one machine

Abstract

A steamer, oven and microwave oven all-in-one comprises a box body and a cooking cavity arranged in the box body, an air guide assembly is installed on the upper mounting plate above the cooking cavity, the air guide assembly comprises an air guide plate and a fan, a microwave generating device comprises a waveguide and a microwave stirrer, the waveguide is installed on the upper mounting plate and the front end thereof extends below the air guide plate, a avoidance cavity for avoiding the microwave stirrer is provided on the air guide plate, and the avoidance cavity and the air guide channel inside the air guide plate are not connected to each other. The steamer, oven and microwave oven all-in-one emits microwaves from the top of the cooking cavity, the avoidance cavity on the air guide plate can avoid the microwave stirrer on the top of the cooking cavity, so that the exhaust of the air guide plate is more uniform; a hot air blower baffle is installed on the rear side of the back plate of the cooking cavity, so that the matching position of the hot air blower baffle and the back plate is located outside the microwave energy field, so as to avoid the occurrence of sparking phenomenon, and water can flow inside the sealing ring between the heating plate and the bottom plate of the cooking cavity, so as to seal the steam and effectively prevent microwave leakage.

Description

Technical Field

[0001] The invention relates to a cooking device, in particular to an all-in-one steamer, oven and microwave oven. Background Art

[0002] As people's quality of life continues to improve, kitchen appliances are becoming more and more abundant. Microwave ovens, ovens, steamers, etc. have gradually become essential kitchen appliances for family life. These kitchen appliances not only have relatively simple functions, but each product requires a certain amount of kitchen space, and the cost of purchasing them separately is high. In order to effectively utilize kitchen space and reduce purchase costs, people invented the steamer, oven, and microwave oven all-in-one. For example, the "Microwave Steamer and Oven All-in-One" disclosed in the Chinese utility model patent with patent number 201320074461.4 (authorization announcement number CN 203168920 U) includes a body, a door frame and a controller installed on the front of the body, a cavity in the body, a transformer installed on the top of the body, a capacitor connected to the transformer, a magnetron connected to the capacitor, and a waveguide box connected to the magnetron, microwaves are transmitted into the cavity through the waveguide box, a microwave agitator is arranged at the microwave inlet in the cavity, a low-speed motor is connected to the microwave agitator, a water container and a steam generator connected to the water container are installed on the side wall of the body, the steam generator is communicated with the cavity in the body, a heating pipe is arranged on the top of the cavity in the body, and the heating pipe is connected to the controller. Although the microwave oven, steamer and oven integrate the functions of a microwave oven, a steamer and an oven in one, it is not only fully functional and easy to use, but also occupies relatively little kitchen space and has a low cost. However, since its microwave generator is installed on the top of the cavity, the microwave oven, steamer and oven does not disclose the specific structure of the air guide system. Usually, the air guide system is installed on the upper mounting plate on the top of the cavity. If the air guide system is not specially designed, the air guide plate of the air guide system is likely to interfere with the spatial position of the microwave generator, resulting in a poor exhaust effect.

[0003] There is a common problem with steam cooking microwave ovens on the market. After steam cooking, condensed water will be generated in the cavity. If the user does not clean up the accumulated water in time, the next time the microwave cooking function is used, the microwave heating speed will be slower, because the condensed water in the cavity will absorb part of the microwave, thus affecting the user experience. In addition, for steam-bake micro-in-one machines, if the hot air blower baffle is set inside the inner tank, the connection between the hot air blower baffle and the inner tank back cover will be in the microwave energy field. At this time, if the hot air blower baffle and the inner tank back cover produce a small gap, sparks will be generated between the hot air blower baffle and the inner tank back cover. In order to avoid steam leakage, the hot air blower baffle and the inner tank back cover need to be connected through a sealing ring, but because the sealing ring is in a high-temperature baking environment for a long time, it will age and crack. In summary, further improvements need to be made to the existing steam-bake micro-in-one machines. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide a steamer, oven and microwave oven all-in-one machine in which the microwave generating device at the top of the cooking cavity can avoid the air guide plate and exhaust the air more evenly, in response to the above-mentioned existing technical status.

[0005] The second technical problem to be solved by the present invention is to provide a steamer, oven and microwave oven integrated machine which can avoid microwave ignition and microwave leakage between the hot air blower baffle and the cooking cavity in response to the above-mentioned existing technical status.

[0006] The third technical problem to be solved by the present invention is to provide an all-in-one steamer, oven and microwave oven which can seal steam between the heating plate and the cooking cavity and effectively prevent microwave leakage.

[0007] The technical solution adopted by the present invention to solve the first technical problem mentioned above is: the steamer, oven and microwave oven all-in-one machine comprises a box body and a cooking cavity arranged in the box body, a steam generating device, a microwave generating device and a grill generating device are installed in the box body, an upper mounting plate is installed above the cooking cavity, an air guide component for discharging the steam in the cooking cavity is installed on the upper mounting plate, the air guide component comprises an air guide plate and a fan installed at the rear of the air guide plate, the microwave generating device comprises a waveguide tube and a microwave agitator installed at the front end of the waveguide tube, characterized in that: the waveguide tube is installed on the upper mounting plate and the front end of the waveguide tube extends to the bottom of the air guide plate, and an avoidance cavity for avoiding the microwave agitator is provided on the air guide plate, and the avoidance cavity and the air guide channel inside the air guide plate are not connected to each other.

[0008] Preferably, the microwave stirrer comprises a stirring motor and a stirring head mounted on the stirring motor, the stirring motor is located outside the top plate of the cooking cavity and is arranged in the avoidance cavity, and the stirring head is located inside the top plate of the cooking cavity.

[0009] In order to make the exhaust of the air guide plate more uniform, the rear wall and the front wall of the avoidance cavity are both arc walls, the radius of the rear wall is greater than the radius of the front wall, and the rear wall and the front wall are connected by a connecting wall.

[0010] In order to make the avoidance cavity more conducive to uniform exhaust of the air guide plate, the connecting wall is a straight wall, and there is a smooth transition between the rear peripheral wall and the connecting wall, as well as between the front peripheral wall and the connecting wall.

[0011] Further preferably, the avoidance cavity is offset on the left side of the wind guide plate, and the avoidance cavity is inclined from back to front to the left side; or, the avoidance cavity is offset on the right side of the wind guide plate, and the avoidance cavity is inclined from back to front to the right side.

[0012] Further preferably, a glass-ceramic plate is installed inside the cooking cavity plate portion, a stirring cavity is formed between the glass-ceramic plate and the cooking cavity top plate, and the stirring head is arranged in the stirring cavity.

[0013] In order to make the installation position of the microwave generating device more reasonable, the microwave generating device also includes a magnetron, a high-voltage capacitor, a high-voltage fuse and a high-voltage transformer installed on the rear side of the back plate of the cooking cavity. The magnetron is installed at the rear end of the waveguide, and the high-voltage capacitor, the high-voltage fuse and the high-voltage transformer are located at the bottom of the rear side of the back plate of the cooking cavity.

[0014] The technical solution adopted by the present invention to solve the above-mentioned second technical problem is: the steamer, oven and microwave oven all-in-one machine is provided with a hot air blower baffle on the rear side of the back plate of the cooking cavity, a hot air chamber is formed between the hot air blower baffle and the back plate, the barbecue generating device includes a hot air blower and a back heating pipe installed in the hot air chamber, ventilation holes that can prevent microwaves from passing through are opened in the area of ​​the back plate corresponding to the hot air chamber, and a sealing connection is formed between the hot air blower baffle and the back plate.

[0015] In order to cool the sealing ring by water cooling, an annular installation cavity is formed between the edge of the hot air blower baffle and the back plate, a first sealing ring is installed in the annular installation cavity, and an annular water flow channel arranged along the circumference of the first sealing ring is formed in the annular installation cavity. In this way, the sealing ring is effectively prevented from aging and cracking, ensuring that the sealing ring can be used for a long time.

[0016] Preferably, the area other than the edge of the hot air blower baffle is recessed backwards to form the hot air chamber between the baffle and the back plate, and the outer edge of the hot air blower baffle is bent toward the back plate to form a baffle, and the baffle abuts against the back plate to form the annular installation cavity.

[0017] In order to improve the water cooling effect of the sealing ring, the inner and outer edges of the front and rear sides of the first sealing ring are provided with a front sealing rib extending forward and a rear sealing rib extending backward. The front sealing rib abuts against the back plate to form a front annular water flow channel between the back plate and the first sealing ring, and the rear sealing rib abuts against the edge to form a rear annular water flow channel between the hot air blower baffle and the first sealing ring. The first sealing ring is provided with a water hole, and the front annular water flow channel and the rear annular water flow channel are connected to each other through the water hole.

[0018] In order to allow water outside the cooking cavity to flow into the cooking cavity through the annular water flow channel, a water inlet and a water outlet are opened on the edge of the hot air blower baffle, the water inlet is connected with the water outlet through the annular water flow channel, and the water inlet is connected with the water inlet pipe outside the cooking cavity, and the water outlet is connected with the inside of the cooking cavity through the water outlet pipe.

[0019] The technical solution adopted by the present invention to solve the above-mentioned third technical problem is: the steam generating device of the steamer, oven and microwave oven integrated machine includes a water tank, a water pump and a heating plate, the water tank is installed on the upper mounting plate, an opening for the water tank to enter and exit is opened on the control panel on the front of the box body, a water inlet hole and an exhaust hole are opened on the side wall of the cooking cavity, the water pump is connected to the water path between the water outlet of the water tank and the water inlet hole, the exhaust hole is connected to the air guide assembly, and the heating plate is sealed and installed on the bottom plate of the cooking cavity.

[0020] There can be a variety of sealing connection structures between the heating plate and the bottom plate of the cooking cavity. Preferably, a mounting hole is opened on the bottom plate of the cooking cavity, and an annular groove surrounding the mounting hole is formed on the bottom plate. The top of the inner wall of the annular groove forms a step extending radially inward, and the heating plate is detachably connected to the step. A second sealing ring is installed in the annular groove, and the heating plate is sealed and connected to the bottom plate of the cooking cavity through the second sealing ring.

[0021] In order to allow the water in the water tank to flow smoothly onto the heating plate, a liquid inlet hole connected to the water outlet of the water pump is opened on the outer wall of the annular groove, a liquid receiving cavity connected to the liquid inlet hole is formed inside the second sealing ring, and a liquid discharge hole connected to the liquid receiving cavity is also opened on the top of the second sealing ring.

[0022] Preferably, the liquid receiving chamber is annular and is arranged on the outer periphery of the second sealing ring.

[0023] In order to facilitate the condensed water to flow back to the heating plate, the mounting hole is arranged in the center of the bottom plate, the bottom plate gradually slopes downward from the outer circumference to the mounting hole, and the upper surface of the heating plate is lower than the upper edge of the outer wall of the annular groove.

[0024] In order to effectively prevent the heating plate from being partially dry-burned, a boss protruding upward is formed in the center of the upper surface of the heating plate.

[0025] In order to dissipate the heat generated when the all-in-one machine is working to the outside of the box, heat dissipation holes are opened on the side wall of the box.

[0026] Compared with the prior art, the advantages of the present invention are: the steam-bake micro-in-one machine emits microwaves from the top of the cooking cavity, and the avoidance cavity on the air guide plate can avoid the microwave agitator on the top of the cooking cavity, so that the exhaust of the air guide plate is more uniform; the hot air blower baffle is installed on the rear side of the back plate of the cooking cavity, so that the matching position of the hot air blower baffle and the back plate is located outside the microwave energy field to avoid sparking, and the sealing ring can also be cooled by water cooling to effectively avoid aging and cracking of the sealing ring and ensure that the sealing ring can be used for a long time; in addition, water can flow inside the sealing ring between the heating plate and the bottom plate of the cooking cavity, so that steam can be sealed and microwave leakage can be effectively prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0028] Figure 2 It is a schematic diagram of the structure of the embodiment of the present invention after removing the top plate of the box body;

[0029] Figure 3 Schematic diagram of the internal structure of an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of the avoidance structure between the air guide assembly and the microwave generator according to an embodiment of the present invention;

[0031] Figure 5 for Figure 4 a top view of the structure shown;

[0032] Figure 6 for Figure 4 a cross-sectional view of the structure shown;

[0033] Figure 7 Schematic diagram of the internal structure of an embodiment of the present invention;

[0034] Figure 8 is a schematic structural diagram of a cooking cavity according to an embodiment of the present invention;

[0035] Fig. 9 for Figure 8 The schematic diagram of the structure without the heat shield;

[0036] Fig.10 It is a partial exploded schematic diagram of a cooking cavity according to an embodiment of the present invention;

[0037] Fig.11 for Fig.10 A structural cross-sectional view of the cooking cavity shown;

[0038] Fig.12 for Fig.11 A magnified schematic diagram of part A;

[0039] Fig.13 This is a schematic structural diagram of a hot air blower baffle according to an embodiment of the present invention;

[0040] Fig.14 A schematic diagram of the structure of a sealing ring according to an embodiment of the present invention;

[0041] Fig.15 A structural cross-sectional view of an embodiment of the present invention;

[0042] Fig.16 A cross-sectional view of the structure of the heating plate installed in an embodiment of the present invention;

[0043] Fig.17Another structural cross-sectional view of the heating plate installation structure according to an embodiment of the present invention;

[0044] Fig.18 It is a partial three-dimensional exploded schematic diagram of an embodiment of the present invention;

[0045] Fig.19 for Fig.18 Schematic diagram of the enlarged portion B. DETAILED DESCRIPTION

[0046] The present invention is further described in detail below with reference to the accompanying drawings.

[0047] like Figures 1 to 9 As shown, the steamer oven microwave oven of this embodiment comprises a box 1, a cooking cavity 2 is installed inside the box 1, an upper mounting plate 3 is installed above the cooking cavity 2, an air guide assembly 4 is installed on the upper mounting plate 3, and the air guide assembly 4 is used to discharge the steam in the cooking cavity 2 to the outside of the box 1. The box 1 has a steam generator, a microwave generator and a grill generator, and the steaming mode, microwave mode and grilling mode all share the cooking cavity 2. A pull-down door assembly 20 is installed on the front side of the box 1, and a control panel 10 is provided above the door assembly 20. The control panel 10 can select and control the working mode of the all-in-one machine. In addition, a heat dissipation hole 100 is opened on the side wall of the box 1 to facilitate the discharge of heat generated when the all-in-one machine is working.

[0048] The air guide assembly 4 includes an air guide plate 41 and a fan 42 installed at the rear of the air guide plate 41. In this embodiment, the air inlet of the fan 42 is connected to the exhaust port 25 on the right side wall of the cooking cavity 2. When the all-in-one machine is working, the steam inside the cooking cavity 2 enters the fan 42 through the exhaust port 25 and is then discharged through the air guide plate 41.

[0049] The microwave generating device of this embodiment includes a waveguide 51, a microwave stirrer 52, a magnetron 53, a high-voltage capacitor 54, a high-voltage fuse 55 and a high-voltage transformer 56. The microwave generating device adopts a structure of ejecting microwaves. Among them, the high-voltage capacitor 54, the high-voltage fuse 55 and the high-voltage transformer 56 are installed at the bottom of the rear side of the back plate of the cooking cavity, the high-voltage transformer 56 is located at the lower left corner of the rear side of the back plate 22, the high-voltage capacitor 54 is located at the right position of the rear side of the back plate 22, the waveguide 51 is installed on the upper mounting plate 3, the front end of the waveguide 51 extends below the air guide plate 41, the microwave stirrer 52 is installed at the front end of the waveguide 51, and the magnetron 53 is located on the upper side of the high-voltage transformer 56 and installed at the rear end of the waveguide 51.

[0050] The microwave stirrer 52 specifically includes a stirring motor 521 and a stirring head 522 installed on the stirring motor. The stirring motor 521 is located on the outside of the top plate 21 of the cooking cavity 2, and a microcrystalline glass plate 6 is installed on the inside of the top plate 21 of the cooking cavity 2. A stirring cavity 500 is formed between the microcrystalline glass plate 6 and the top plate 21 of the cooking cavity 2, and the stirring head 522 is arranged in the stirring cavity 500. In this embodiment, a heat transfer hole 211 is opened on the top wall of the stirring cavity 500. The heat transfer holes 211 are distributed along the auxiliary heating tube 79. The heat generated by the auxiliary heating tube 79 passes through the heat transfer holes 211 to the bottom of the stirring cavity 500, so that the microcrystalline glass plate 6 can be heated to avoid residual condensed water on the microcrystalline glass plate 6, so that the microwaves coming out from the top can be directly absorbed by the food, thereby accelerating the heating speed of the food. In addition, the outer cover of the auxiliary heating tube 79 is provided with a heat insulation cover 710, and part of the heat generated by the auxiliary heating tube 79 is stored by the heat insulation cover 710 at the top of the cooking cavity 2.

[0051] After the microwave ejection structure is adopted in this embodiment, the air guide assembly 4 is required to avoid the waveguide 51 and the microwave stirrer 52. The air guide plate 41 of this embodiment is provided with an avoidance cavity 43, and the stirring motor 521 is arranged in the avoidance cavity 43, so that the air guide plate 41 can avoid the microwave stirrer 52. In addition, the avoidance cavity 43 and the air guide channel inside the air guide plate 41 are not connected to each other.

[0052] The avoidance cavity 43 of this embodiment is offset to the left side of the air guide plate 41, and the avoidance cavity 43 is inclined to the left side from the back to the front. The rear peripheral wall 431 and the front peripheral wall 432 of the avoidance cavity 43 are both arc walls, the radius of the rear peripheral wall 431 is greater than the radius of the front peripheral wall 432, and the rear peripheral wall 431 and the front peripheral wall 432 are connected by the connecting wall 433. In addition, the connecting wall 433 adopts a straight wall, and the transition between the rear peripheral wall 431 and the connecting wall 433 and the front peripheral wall 432 and the connecting wall 433 is smooth. After flow field simulation and experimental verification, the air guide plate 41 adopts a structure with the avoidance cavity 43, which not only allows microwaves to work, but also does not affect the steam extraction effect. The steam flow field in the air guide plate 41 is discharged stably, and no vortex appears around the avoidance cavity 43.

[0053] like Figures 10 to 14 As shown, the barbecue generating device of this embodiment includes an upper heating pipe 70 installed on the top of the cooking cavity 2 and a hot air blower assembly installed on the back of the cooking cavity 2. A hot air blower baffle 71 is installed on the rear side of the back plate 22 of the cooking cavity 2, and a hot air chamber 72 is formed between the hot air blower baffle 71 and the back plate 22. The hot air blower assembly includes a hot air blower 73 and a back heating pipe 74 and is installed in the hot air chamber 72. A ventilation hole 221 that can prevent microwaves from passing through is opened in the area corresponding to the hot air chamber on the back plate 22, and the hot air blower baffle 71 and the back plate 22 are sealed and connected.

[0054] The ventilation holes 221 of this embodiment are designed as small round holes, and the aperture of the small round holes is designed to prevent microwaves from passing through, thereby preventing microwaves in the inner pot from entering the hot air chamber 72. In addition, the hot air blower baffle 71 is placed outside the microwave energy field, solving the microwave ignition problem between the hot air blower baffle 71 and the back plate 22 of the cooking cavity 2.

[0055] In this embodiment, the outer edge 711 of the hot air blower baffle 71 is bent toward the back plate 22 to form a baffle 712, and the baffle 712 abuts against the back plate 22 to form an annular installation cavity 75, and a first sealing ring 76 is installed in the annular installation cavity 75. In the barbecue mode, the first sealing ring 76 is in a high temperature environment for a long time, and is prone to aging and cracking. Therefore, a cooling water system is designed in this embodiment. Specifically, an annular water flow channel arranged along the circumference of the first sealing ring 76 is formed in the annular installation cavity 75, and the first sealing ring 76 can be cooled by injecting cold water into the annular water flow channel.

[0056] like Fig.12 As shown, with the direction indicated by arrow C as the forward direction, the inner and outer edges of the front and rear sides of the first sealing ring 76 are provided with a front sealing rib 761 extending forward and a rear sealing rib 762 extending backward. The front sealing rib 761 abuts against the back plate 22 to form a front annular water flow channel 77 between the back plate 22 and the sealing ring 76. The rear sealing rib 762 abuts against the edge 711 to form a rear annular water flow channel 78 between the hot air blower baffle 71 and the first sealing ring 76. A water hole 763 is provided on the first sealing ring 76. The front annular water flow channel 77 and the rear annular water flow channel 78 are connected to each other through the water hole 763. A water inlet 713 is provided on the lower edge 711 of the hot air blower baffle 71, and a water outlet 714 is provided on the upper edge of the hot air blower baffle 71. The water inlet 713 is connected to the water outlet 714 through the annular water flow channel. The water inlet 713 is connected to the water inlet pipe 700 outside the cooking cavity 2, and the water outlet 714 is connected to the inside of the cooking cavity 2 through the water outlet pipe 701. After the cooling water flows through the front annular water flow channel 77 and the rear annular water flow channel 78, it flows out from the water outlet 714 to the water outlet pipe 701, and then flows into the cooking cavity 2. The front sealing rib 761 and the rear sealing rib 762 can prevent water from leaking. In addition, after the annular water flow channel is formed along the first sealing ring, in addition to cooling the first sealing ring 76, it can also prevent the steam in the cooking cavity 2 from leaking.

[0057] like Figure 3 and Figure 8As shown, the steam generating device of this embodiment includes a water tank 81, a water pump 82 and a heating plate 83. The water tank 81 is mounted on the upper mounting plate 3. An opening for the water tank to enter and exit is provided on the control panel 10 on the front of the housing 1. A water inlet 24 and an exhaust hole 25 are provided on the right side wall of the cooking cavity 2. The water pump 82 is connected to the water path between the water outlet of the water tank 81 and the water inlet 24. The exhaust hole 25 is connected to the air guide assembly 4. The heating plate 83 is sealed and mounted on the bottom plate 23 of the cooking cavity 2. Since the strong electric part of the microwave generating device is located at the rear side of the cooking cavity 2, it is separated from the water tank 11 and the water path system and other components, thereby ensuring electrical safety.

[0058] The installation structure of the heating plate 83 is as follows:

[0059] like Figures 15 to 19 As shown, a mounting hole 231 is formed on the bottom plate 23 of the cooking cavity 2. The mounting hole 231 is located in the center of the bottom plate 23. The bottom plate 23 gradually slopes downward from the outer circumference to the mounting hole 231. An annular groove 232 surrounding the mounting hole 231 is formed on the bottom plate 23. A step 233 extending radially inward is formed on the top of the inner wall of the annular groove 232. The heating plate 83 is detachably connected to the step 233, and the upper surface of the heating plate 83 is lower than the upper edge of the outer wall of the annular groove 232. A second sealing ring 234 is installed in the annular groove 232. The second sealing ring 234 is also sleeved on the outer circumference of the heating plate 83. The heating plate 83 is sealed with the bottom plate 23 through the second sealing ring 234.

[0060] In this embodiment, a liquid inlet hole 235 is opened on the outer wall of the annular groove 232, and the liquid inlet hole 235 is connected to the water outlet of the water pump 82. The water outlet of the water pump 82 is connected to the liquid inlet hole 235 through a water pipe, which is an existing conventional structure and will not be explained in detail here.

[0061] The outer periphery of the sealing ring 234 has an annular hollow structure, which forms a liquid receiving cavity 236 connected to the liquid inlet hole 235, and water flows into the liquid receiving cavity 236 from the liquid inlet hole 235. A liquid discharge hole 237 connected to the liquid receiving cavity 236 is also opened on the top of the second sealing ring 234. In this embodiment, there are two liquid discharge holes 237, which are arranged opposite to each other along the circumference of the second sealing ring 234.

[0062] A boss 831 protruding upward is formed in the center of the upper surface of the heating plate 83, and a heating tube and a temperature sensor (not shown) are installed at the bottom of the heating plate 83. The heating plate 83 is heated by the heating tube. After the boss 831 is set, since it is higher than the bottom surface of the heating plate 83, when the water level drops below the liquid level of the boss 831, water is added to prevent the bottom surface of the heating plate 83 from being dry-burned, which will produce dry-burned odor and scale. At the same time, the boss 831 prevents the heating plate 83 from being installed unevenly, resulting in local dry-burning, and prevents the heating plate 83 from being dry-burned and affecting the life of the heating plate. In addition, the temperature sensor can control the on and off of the heating tube of the heating plate, and the condensed water in the cooking cavity 2 can be recycled and evaporated again, which can increase the continuous cooking time of a box of water and reduce the condensed water in the cavity.

[0063] In the steam working mode, the water in the water tank 81 flows into the heating plate 83 through the water inlet hole 24 driven by the water pump 82, and generates steam after being heated by the heating plate 83, thereby realizing the steaming function. At the same time, the second sealing ring 234 is squeezed by the heating plate 83 to seal the water and steam. At this time, there is no water in the liquid receiving cavity 236. The condensed water generated during the steam working enters the liquid receiving cavity 236 through the drainage hole 237, and can flow back to the water tank 81 through the liquid inlet hole 235, thereby preventing the heating plate 83 from needing to heat and treat the condensed water after cooking. In addition, in the steam working mode, the water from the water pump 82 can also flow into the heating plate 83 through the liquid inlet hole 235, the liquid receiving cavity 236 and the drainage hole 237 in sequence, and evaporates to generate steam after being heated by the heating plate 83. The above two different water system can be selected to work one by one.

[0064] In the microwave working mode, water is injected into the liquid receiving cavity 236 through the liquid inlet hole 235, and the microwave is absorbed by the water inside the liquid receiving cavity 236, and will not leak from the gap between the cooking cavity 2 and the heating plate 83. At the same time, the drainage hole 237 becomes an exhaust hole. After the water in the liquid receiving cavity 236 is heated by the microwave into steam, it enters the cooking cavity 2 through the drainage hole 237, replenishing a small amount of lost water for the food. In addition, at the connection between the heating plate 83 and the cooking cavity 2, there is almost no microwave leakage through the cutoff waveguide, thereby reducing the internal leakage of microwaves, making cooking safer and more reliable.

[0065] When the user finishes the steam cooking mode and starts the microwave function, the microwaves emitted from the top of the cooking cavity 2 can be directly absorbed by the food, preventing the microwaves from being absorbed by condensed water in the cooking cavity 2, thereby speeding up the microwave heating speed.

Claims

1. A steamer, oven and microwave oven integrated machine, comprising a box (1) and a cooking cavity (2) arranged in the box, a steam generator, a microwave generator and a grill generator installed in the box (1), an upper mounting plate (3) installed above the cooking cavity (2), an air guide assembly (4) for discharging steam in the cooking cavity (2) installed on the upper mounting plate (3), the air guide assembly (4) comprising an air guide plate (41) and a fan (42) installed at the rear of the air guide plate, the microwave generator comprising a waveguide (51) and a microwave stirrer (52) installed at the front end of the waveguide, characterized in that: The waveguide (51) is mounted on the upper mounting plate (3) and the front end of the waveguide (51) extends below the air guide plate (41). The air guide plate (41) is provided with an avoidance cavity (43) for avoiding the microwave stirrer (52). The avoidance cavity (43) is not connected to the air guide channel inside the air guide plate (41). The microwave stirrer (52) comprises a stirring motor (521) and a stirring head (522) mounted on the stirring motor. The stirring motor (521) is located outside the top plate (21) of the cooking cavity (2) and is arranged in the avoidance cavity (43). The stirring head (522) is located inside the top plate (21) of the cooking cavity (2). 3) The rear circumferential wall (431) and the front circumferential wall (432) are both arc walls, the radius of the rear circumferential wall (431) is greater than the radius of the front circumferential wall (432), and the rear circumferential wall (431) and the front circumferential wall (432) are connected via a connecting wall (433), the connecting wall (433) is a straight wall, and there is a smooth transition between the rear circumferential wall (431) and the connecting wall (433), and between the front circumferential wall (432) and the connecting wall (433), the avoidance cavity (43) is offset to the left side of the air guide plate (41), and the avoidance cavity (43) is inclined from the back to the front to the left side; or, the avoidance cavity (43) is offset to the right side of the air guide plate (41), and the avoidance cavity (43) is inclined from the back to the front to the right side.

2. The integrated steamer, oven and microwave oven according to claim 1, characterized in that: A glass-ceramic plate (6) is installed on the inner side of the top plate (21) of the cooking cavity (2), a stirring cavity (500) is formed between the glass-ceramic plate (6) and the top plate (21) of the cooking cavity (2), and the stirring head (522) is arranged in the stirring cavity (500).

3. The integrated steamer oven and microwave oven according to claim 1, characterized in that: The microwave generating device further comprises a magnetron (53), a high-voltage capacitor (54), a high-voltage fuse (55) and a high-voltage transformer (56) which are installed on the rear side of the back plate (22) of the cooking cavity (2); the magnetron (53) is installed at the rear end of the waveguide (51); and the high-voltage capacitor (54), the high-voltage fuse (55) and the high-voltage transformer (56) are located at the bottom of the rear side of the back plate (22) of the cooking cavity (2).

4. The integrated steamer, oven and microwave oven according to any one of claims 1 to 3, characterized in that: A hot air blower baffle (71) is installed on the rear side of the back plate (22) of the cooking cavity (2), a hot air chamber (72) is formed between the hot air blower baffle (71) and the back plate (22), the barbecue generating device comprises a hot air blower (73) and a back heating pipe (74) installed in the hot air chamber (72), a ventilation hole (221) capable of preventing microwaves from passing through is opened in the area of ​​the back plate (22) corresponding to the hot air chamber, and a sealing connection is formed between the hot air blower baffle (71) and the back plate (22).

5. The integrated steamer oven and microwave oven according to claim 4, characterized in that: An annular installation cavity (75) is formed between the edge (711) of the hot air blower baffle (71) and the back plate (22), a first sealing ring (76) is installed in the annular installation cavity (75), and an annular water flow channel arranged along the circumference of the first sealing ring (76) is formed in the annular installation cavity (75).

6. The integrated steamer oven and microwave oven according to claim 5, characterized in that: The area of ​​the hot air blower baffle (71) other than the edge is recessed backwards to form the hot air chamber (72) between the hot air blower baffle and the back plate (22); the outer edge of the edge (711) of the hot air blower baffle (71) is bent toward the back plate (22) to form a baffle edge (712); the baffle edge (712) abuts against the back plate (22) to form the annular installation cavity (75).

7. The integrated steamer, oven and microwave oven according to claim 6, characterized in that: The inner and outer edges of the front and rear side surfaces of the first sealing ring (76) are provided with a front sealing rib (761) extending forward and a rear sealing rib (762) extending backward. The front sealing rib (761) abuts against the back plate (22) to form a front annular water flow channel (77) between the back plate (22) and the first sealing ring (76). The rear sealing rib (762) abuts against the edge (711) to form a rear annular water flow channel (78) between the hot air blower baffle (71) and the first sealing ring (76). The first sealing ring (76) is provided with a water hole (763). The front annular water flow channel (77) and the rear annular water flow channel (78) are connected to each other through the water hole (763).

8. The integrated steamer, oven and microwave oven according to claim 7, characterized in that: A water inlet (713) and a water outlet (714) are provided on the edge (711) of the hot air blower baffle (71); the water inlet (713) is connected to the water outlet (714) via an annular water flow channel; the water inlet (713) is connected to a water inlet pipe (700) outside the cooking cavity (2); and the water outlet (714) is connected to the inside of the cooking cavity (2) via the water outlet pipe (701).

9. The integrated steamer, oven and microwave oven according to any one of claims 1 to 3, characterized in that: The steam generating device comprises a water tank (81), a water pump (82) and a heating plate (83); the water tank (81) is mounted on an upper mounting plate (3); an opening for the water tank to enter and exit is provided on a control panel (10) on the front of the housing (1); a water inlet hole (24) and an exhaust hole (25) are provided on a side wall of the cooking cavity (2); the water pump (82) is connected to a water path between a water outlet of the water tank (81) and the water inlet hole (24); the exhaust hole (25) is connected to an air guide assembly (4); and the heating plate (83) is sealed and mounted on a bottom plate (23) of the cooking cavity (2).

10. The integrated steamer, oven and microwave oven according to claim 9, characterized in that: A mounting hole (231) is formed on the bottom plate (23) of the cooking cavity (2), and an annular groove (232) is formed on the bottom plate (23) around the mounting hole. A step (233) extending radially inward is formed at the top of the inner wall of the annular groove (232). The heating plate (83) is detachably connected to the step (233). A second sealing ring (234) is installed in the annular groove (232). The heating plate (83) is sealed and connected to the bottom plate (23) of the cooking cavity (2) via the second sealing ring (234).

11. The integrated steamer, oven and microwave oven according to claim 10, characterized in that: A liquid inlet hole (235) connected to the water outlet of the water pump (82) is formed on the outer wall of the annular groove (232); a liquid receiving cavity (236) connected to the liquid inlet hole (235) is formed inside the second sealing ring (234); and a liquid discharge hole (237) connected to the liquid receiving cavity (236) is also formed on the top of the second sealing ring (234).

12. The integrated steamer, oven and microwave oven according to claim 11, characterized in that: The liquid receiving chamber (236) is annular and is arranged on the outer periphery of the second sealing ring (234).

13. The integrated steamer, oven and microwave oven according to claim 10, characterized in that: The mounting hole (231) is arranged at the center of the bottom plate (23), the bottom plate (23) gradually slopes downward from the outer circumference to the mounting hole (231), and the upper surface of the heating plate (83) is lower than the upper edge of the outer wall of the annular groove (232).

14. The integrated steamer, oven and microwave oven according to claim 10, characterized in that: A boss (831) protruding upward is formed in the center of the upper surface of the heating plate (83).

15. The integrated steamer, oven and microwave oven according to claim 1, characterized in that: A heat dissipation hole (100) is provided on the side wall of the box body (1).

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