Combined heating microwave oven structure

Abstract

The invention discloses a combined heating microwave oven structure which comprises a box body, a microwave oven body and a microwave oven body. The electric control board is connected to one side of the inner container and used for supplying power; the microwave frequency conversion board is used for adjusting power supply frequency; the magnetron is used for generating microwaves for heating; the door body is connected to the front side of the refrigerator body and controls opening and closing of the inner container; the heat dissipation assembly is arranged between the box body and the inner container and is used for dissipating heat of the microwave frequency conversion plate and the magnetron; the heat dissipation assembly comprises a first fan, an air duct and an air guide assembly, the first fan is fixedly connected to the inner container, an air inlet of the first fan is matched with the ventilation opening of the box body, one end of the air duct is communicated with the first fan, the microwave frequency conversion plate and the magnetron are both arranged in the air duct, and the air guide assembly is arranged at the other end of the air duct and communicated with the inner container. According to the microwave oven, the microwave frequency conversion plate and the magnetron are cooled through the fan I, meanwhile, heat is blown into the inner container of the microwave oven, and a preheating effect is also provided for the microwave oven.

Description

Technical Field

[0001] The invention belongs to the technical field of microwave oven equipment, and in particular relates to a combined heating microwave oven structure. Background Art

[0002] A microwave oven is a cooking appliance that heats itself by absorbing microwave energy in a microwave field. The microwaves generated by the microwave generator in a microwave oven establish a microwave electric field in the microwave cavity, and certain measures are taken to make the microwave electric field as evenly distributed as possible in the cavity. Food is placed in the microwave electric field, and the cooking time and microwave electric field intensity are controlled by the control center to perform various cooking processes.

[0003] In traditional technology, when a microwave oven is in use, the microwave inverter board and magnetron operate to heat the food. The temperature of the microwave inverter board and magnetron will rise sharply during operation, causing the temperature above the microwave oven inner pot to be too high. With continued use, high temperature will accelerate the oxidation of the magnetron filament, demagnetization of the magnet, and the loss of electronic components such as the inverter board capacitor, shortening the overall service life. It may also affect nearby high-voltage capacitors or diodes, causing secondary failures. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned technical problems existing in the prior art, and to provide a combined heating microwave oven structure. By arranging a fan 1, an air duct and an air guide component on the top of an inner pot, a microwave frequency conversion board and a magnetron are prevented in the air duct. When the microwave oven is working, the microwave frequency conversion board and the magnetron generate heat during operation. The fan 1 runs synchronously to suck the outside air into the air duct through the vent of the microwave oven body to dissipate the heat of the microwave frequency conversion board and the magnetron. At the same time, the heat is blown into the inner pot of the microwave oven through the air guide component to provide a preheating effect for the microwave oven. When the temperature in the microwave oven rises, the air guide component closes the air duct and the inner pot, and the fan 1 continues to dissipate the heat of the microwave frequency conversion board and the magnetron.

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

[0006] The structure of a combined heating microwave oven comprises: a box body with an inner pot built in; an electric control board connected to one side of the inner pot for power supply; a microwave frequency conversion board for adjusting the power frequency; a magnetron for generating microwaves for heating; a door body connected to the front side of the box body for controlling the switch of the inner pot; and also comprises: a heat dissipation component arranged between the box body and the inner pot for dissipating the heat of the microwave frequency conversion board and the magnetron; the heat dissipation component comprises a fan 1, an air duct and an air guide component, the fan 1 is fixedly connected to the inner pot, the air inlet of the fan 1 is matched with the air vent of the box body, one end of the air duct is connected to the fan 1, the microwave frequency conversion board and the magnetron are both arranged in the air duct, the air guide component is arranged at the other end of the air duct, and the air guide component is connected to the inner pot. The present invention arranges a fan 1, an air duct and an air guide component on the top of the inner pot, so that the microwave frequency conversion board and the magnetron are placed in the air duct. When the microwave oven is working, the microwave frequency conversion board and the magnetron generate heat, and the fan 1 runs synchronously to suck the outside air into the air duct through the vent of the microwave oven cabinet to dissipate the heat of the microwave frequency conversion board and the magnetron. At the same time, the heat is blown into the inner pot of the microwave oven through the air guide component to provide a preheating effect for the microwave oven. When the temperature in the microwave oven rises, the air guide component closes the air duct and the inner pot, and the fan 1 continues to dissipate the heat of the microwave frequency conversion board and the magnetron.

[0007] Furthermore, the air duct is formed by the cover being arranged on the bottom plate, the bottom plate is fixedly connected to the inner liner, the top surface of the bottom plate is formed with an edge which is raised upward corresponding to the cover, the edge is limited at both sides of the bottom of the cover, the edge is provided with a card slot one, the bottom of the cover is correspondingly provided with an elastic card buckle, and the elastic card buckle is clamped in the card slot one; the air guide assembly comprises an air guide cover, an air guide flap and a driving member, the air guide cover is fixedly connected to the inner liner, one end of the air guide cover is connected to the air duct, the air guide flap is connected to the air guide cover through the driving member, the inner liner is provided with a through hole one corresponding to the air guide cover, the driving member controls the air guide cover to open and close the through hole one, and the inner liner is located A wind curtain air guide bar is provided at one of the through holes; a rotating seat is provided on the side of the air guide cover close to the microwave oven door body, and a corresponding end of the air guide flap is rotatably connected to the rotating seat; a hook is provided on the side of the air guide cover close to the door body, and a hook is provided correspondingly at the other end of the air guide flap, and a spring is connected between the hooks, and the spring pulls the other end of the air guide flap upward to open the through hole; the driving part adopts a wax motor; a motor mounting seat is provided on the air guide cover, and the wax motor is fixedly connected to the motor mounting seat, and the output end of the wax motor passes through the air guide cover and acts on the air guide flap to control the flipping of the air guide flap. The edge limits the cover, and the elastic buckle is locked in the card slot one, so as to fix the bottom plate and the cover. When the microwave oven starts to work, the fan one dissipates the heat from the microwave frequency conversion board and the magnetron, and blows the heat into the air guide cover. The air guide flap is initially in the open state, and the heat is blown in through the through hole one of the inner pot, and is evenly blown into the microwave oven through the wind curtain air guide horizontal strips, which plays a preheating role. When the temperature of the microwave oven inner pot rises to the set value, the wax expands and pushes the piston, triggering the mechanical action, and the wax motor runs, thereby pushing the air guide flap downward, thereby closing the through hole one, and preventing the high temperature in the inner pot from affecting the heat dissipation of the microwave frequency conversion board and the magnetron.

[0008] Furthermore, it also includes a light wave tube assembly, a mounting hole is provided on the top of the microwave oven inner pot, the light wave tube assembly is fixed in the mounting hole, and the light wave tube assembly is used to heat the food in the microwave oven inner pot; the light wave tube assembly includes a fixed bracket, a reflector, a suspension seat, a light wave heating tube and a bottom cover, the top of the suspension seat is fixedly connected to the two ends of the bottom of the fixed bracket, the bottom of the suspension seat is fixedly connected to the top surface of the inner pot, the bottom cover is fixedly connected to the bottom of the reflector, the light wave heating tube is fixedly connected to the mounting cavity 1 formed by the reflector and the bottom cover, and the bottom cover is evenly provided with through holes 1, so that the mounting cavity 1 is connected to the microwave oven inner pot. The light wave tube assembly irradiates the food in the inner pot, and performs a compensatory heating on the heat on the top of the food, so that the food is heated more evenly; heating is performed in the baking mode of the combined heating microwave oven, and auxiliary heating is performed in the microwave mode, and the reflector is set to gather the tubes of the light wave heating tube into the inner pot.

[0009] Furthermore, it also includes a hot air component, which is arranged on the back of the inner tank, and an air suction port is arranged at the center of the inner wall of the inner tank, and air outlets are distributed at the four corners of the inner wall of the inner tank. The hot air component includes a fixed cover, an air guide bracket, a fixed support, fan 2 and an air guide plate. The fixed cover matches the air suction port, and the air outlet cover is arranged on the back of the inner tank, so that an assembly cavity is formed between the fixed cover and the inner tank, and the inner tank is connected to the assembly cavity. An installation groove runs through the back of the fixed cover, and the fixed support is fixedly connected to the installation groove. Fan 2 is located in the assembly cavity and fixedly connected to the fixed support. The air guide bracket is located in the assembly cavity and fixedly connected to the fixed cover. An air guide plate is provided on the side of the air guide bracket close to the inner tank, and a heating tube spacer is also fixedly connected to the side of the air guide bracket close to the inner tank. The heating tube spacer is fixedly connected to an annular heating tube, and the annular heating tube is coiled on the outside of fan 2. In the baking mode of the combined heating microwave oven, the setting of the hot air component allows the hot air in the inner pot to circulate, thereby improving the temperature uniformity of the food; the setting of the air guide plate increases the smoothness of the flow of high-temperature gas in the inner pot, forming a circulating temperature field, so that the food is heated evenly; the setting of the annular heating tube makes the air blown out by the second fan hot air, realizing the cooking method of baking in the combined heating microwave oven.

[0010] Furthermore, it also includes a waveguide box, which is fixedly connected to one side of the inner pot to form a waveguide cavity, a radio frequency output end is provided on one side of the magnetron, and the radio frequency output end is located in the waveguide cavity. A waveguide is provided on the inner wall of the waveguide box away from the inner pot, and a microwave inlet is provided in the inner pot corresponding to the waveguide, and a mica sheet is provided in the microwave inlet. The waveguide adopts a semicircular steel ball, and an interlayer is provided at the bottom of the waveguide box away from the inner pot, and a heat dissipation hole is provided on the outer wall of the interlayer. By installing a waveguide box on the side of the inner pot located at the radio frequency output end of the magnetron, and arranging a waveguide at the radio frequency output end of the waveguide box corresponding to the radio frequency output end, a waveguide cavity is formed between the waveguide box and the inner pot, and the radio frequency output end is located in the waveguide cavity. When the microwave oven is working, the microwave generated by the radio frequency output end is reflected by the waveguide and the inner wall of the waveguide box, and passes through the mica sheet at the microwave inlet of the inner pot into the inner pot to heat the food in the inner pot. The arrangement of the waveguide makes the microwave energy distribution range wide, reduces the energy accumulation at the end of the microwave, greatly improves the heating effect of the food, and ensures the uniform heating of the food. The curved surface structure of the semicircular steel ball allows the microwaves generated by the RF output end to be absorbed by the surface of the semicircular steel ball and then reflected at multiple angles, breaking through the single reflection path limitation of the traditional planar waveguide box. Through the scattering effect, the microwave energy is distributed over a wider range, reducing the energy accumulation at the end of the waveguide, making the food evenly heated and improving the food heating efficiency. By setting up an interlayer, the energy escape or ineffective scattering of microwaves during the transmission process of the waveguide box is reduced, thereby improving the transmission efficiency of microwaves from the magnetron to the inner pot. The interlayer also has a shielding effect, limiting the diffusion of microwaves to non-target areas through multi-level reflection, thereby reducing the potential harm of microwave leakage to the human body and the environment. At the same time, due to the setting of the waveguide, heat will accumulate at the bottom of the waveguide away from the inner pot, and the interlayer also has a heat-insulating effect. Accelerate the transfer of heat from the interlayer to the outside to avoid heat accumulation in the interlayer and overheating of components; at the same time, promote and control the formation of convection between the interlayer and the external environment, improve the heat exchange efficiency, and reduce the operating temperature of core components such as magnetrons. At the same time, the heat dissipation holes destroy the symmetry of the microwave reflection path and reduce the probability of standing wave formation, thereby reducing the abnormal accumulation of microwave energy in specific areas; a choke slot plate is set in the microwave oven door. One is to scatter the microwaves transmitted to the door body back to the inner pot through the choke slot plate, and it also has a screen microwave effect. Through multi-level reflection, it limits the diffusion of microwaves to non-target areas, reducing the potential harm of microwave leakage to the human body and the environment.

[0011] Furthermore, one side of the electric control board is fixedly connected to one side of the inner tank through a mounting base, the mounting base adopts a metal structure, a choke slot is provided on the side of the mounting base close to the inner tank, and a choke slot plate is provided in the door body. The mounting base is used to fix the electric control board; the metal structure ensures the structural strength of the mounting base, improves the service life, and enhances the reflection ability of microwaves, reduces the possibility of microwaves penetrating into the electric control board area, and prevents microwaves from interfering with electronic components or causing safety hazards. The design of the choke slot utilizes the principle of microwave reflection to reflect the microwave energy at the connection between the electric control board mounting base and the inner pot back into the oven cavity, reducing the risk of microwave leakage from the gap of the mounting base to the electric control area, preventing interference with electronic components or safety hazards; improving the absorption and reflection efficiency of high-frequency electromagnetic waves to ensure a stable working environment for the electric control board; and by suppressing microwave leakage, the choke slot reduces energy loss, improves the utilization rate of microwave energy in the inner pot, and reduces the load pressure of the magnetron; at the same time, it avoids the thermal effect of microwaves on the components of the electric control board and extends the service life of the equipment; a choke slot plate is set in the microwave oven door body, one of which is to scatter the microwaves transmitted to the door body back into the inner pot through the choke slot plate, and it also has a microwave shielding effect, limiting the diffusion of microwaves to non-target areas through multi-stage reflection, reducing the potential harm of microwave leakage to the human body and the environment.

[0012] Furthermore, the box body is provided with a door frame corresponding to the door body, the door body is connected with a lock hook, the door frame is fixedly connected with a door lock plate correspondingly, a micro switch is installed on the door lock plate, the lock hook acts on the micro switch, the micro switch is provided with switch 1 and switch 2, a hinge shaft is fixed on the door lock plate, a connecting rod is connected to the hinge shaft, the connecting rod and the lock hook are matched; the connecting rod includes a shaft sleeve, a bending section and a pushing section, the bending section is located between the shaft sleeve and the pushing section, the shaft sleeve is sleeved on the outside of the hinge shaft, the pushing section is matched with the lock hook, and the bending section is matched with the switch 2; the shaft sleeve An upper limit block and a lower limit block are provided on the outer wall, the lower limit block is located below the upper limit block, a limit cavity is formed between the lower limit block and the upper limit block, and a limit portion is provided on the door lock plate correspondingly, the limit portion is limited in the limit cavity, so that the shaft sleeve is limited on the hinge shaft; a lock mouth is provided on the door lock plate corresponding to the lock hook, the lock mouth protrudes to the side away from the lock hook to form a limit convex portion, the limit convex portion limits the top push section, and an inclined portion is provided on the side of the lock mouth close to the lock hook, the inclined portion guides the entry and retreat of the lock hook; a pressing plate is formed on the door lock plate, and the pressing plate is provided with a pressure plate The clamping plate is pressed against the top surface of switch one and switch two and is limited on the door lock plate; the door lock plate is formed with a positioning part corresponding to the protrusion of the clamping plate, and the clamping plate is pressed against one side of switch one and one side of switch two respectively, and the positioning part is pressed against the other side of switch one and the other side of switch two; switch one and switch two are both provided with through hole two, and the mounting plate is correspondingly provided with a positioning column, and the positioning column is inserted into the through hole two; the door lock plate is formed with a positioning part corresponding to the protrusion of the clamping plate, and the clamping plate is pressed against one side of switch one and one side of switch two respectively, and the positioning part is pressed against the other side of switch one and the other side of switch two. The lock hook includes a mounting portion and an extrusion portion, the extrusion portion is connected to one side of the mounting portion close to the door lock plate, a connection hole 1 is provided at the bottom of the mounting portion, the connection hole 1 is used to hang the connection spring 2, and a through hole 2 is provided at the top of the mounting portion for hinged connection to the door body; when the door body is closed, the extrusion portion acts on the switch 1 and pushes the pushing section of the connecting rod, the connecting rod rotates around the hinge axis, so that the bending section acts on the switch 2, and the mounting portion and the extrusion portion adopt an integrally formed structure; the hinge axis is provided with a threaded hole, and a limit screw is connected in the threaded hole. By arranging switch 1 and switch 2 on the door lock plate and rotating the connecting rod on the door lock plate, when the door body is closed, the lock hook acts on switch 1 and pushes the connecting rod at the same time, so that the connecting rod acts on switch 2, and the microwave oven can be started only when switch 1 and switch 2 are fully turned on, which can effectively prevent the microwave oven from being started when the oven door is open, greatly improving the safety of the use of the microwave oven. The shaft sleeve is set on the outside of the hinge shaft to realize the rotation of the connecting rod. When the microwave oven door is closed, the lock hook is inserted into the door lock plate, so that the end of the lock hook acts on switch one, and at the same time, the lock hook pushes the push section, so that the connecting rod rotates around the hinge shaft, and the bending section is controlled to act on switch two. The shaft sleeve is limited to the outside of the hinge shaft by the limit part between the upper limit block and the lower limit block. The setting of the inclined part facilitates the insertion of the lock hook of the microwave oven into the door lock plate. The setting of the inclined part also has a certain guiding effect, which facilitates the entry and exit of the lock hook from the lock port.The clamping plate is against one side of switch 1 and switch 2, and the setting of the clamping plate limits switch 1 and switch 2 on the door lock plate. The setting of the positioning column is inserted into the through hole 2, and the setting of the positioning column plays a role in quickly positioning the installation of switch 1 and switch 2. The positioning part cooperates with the clamping plate to limit and fix the two sides of switch 1 and switch 2, so that switch 1 and switch are fixed on the door lock plate, eliminating the need for screw fixation, and at the same time, switch 1 and switch are simple and convenient to disassemble and assemble. The installation part is used to install the connecting lock hook. When closing the door body, the extrusion part is inserted into the lock mouth, first acting on switch 1, and then pushing the connecting rod, so that the connecting rod acts on switch 2, so that the microwave oven detects that the door body is closed, and then turns on the power to work normally. The installation part and the extrusion part adopt an integrated molding structure, which improves the structural strength of the lock hook and ensures the stability of the door lock switch. By screwing in the limit screw, the shaft sleeve is limited on the hinge shaft.

[0013] Furthermore, a limiting end portion is provided at the top of the hinge shaft, and the outer diameter of the limiting end portion is larger than the inner diameter of the sleeve. After the hinge shaft is injection molded, the sleeve is sleeved onto the outer side of the hinge shaft, and then the top of the hinge shaft is hot pressed to deform the top of the hinge shaft to form a limiting end portion, and the outer diameter of the limiting end portion is larger than the inner diameter of the sleeve, thereby limiting the sleeve on the hinge shaft.

[0014] Furthermore, it also includes a lamp assembly, the lamp assembly includes an LED light board and a mounting frame, the mounting frame is fixedly connected to the inner tank, the LED light board is fixedly connected to the top of the mounting frame, a light guide assembly is provided in the mounting frame, the top of the light guide assembly is matched with the LED light board, a through hole three is provided at the top of the inner tank corresponding to the light guide assembly, the bottom of the light guide assembly is located in the through hole three, and a light-transmitting cover is provided on the top surface of the inner tank at the through hole three. The mounting frame adopts a frame structure, and fixed parts are extended on both sides of the bottom of the mounting frame, and the fixed parts are fixedly connected to the inner tank; the light-transmitting cover adopts a hemispherical structure. By arranging a mounting frame on the top surface of the inner pot, and fixing the LED light board on the top of the mounting frame, three through holes are correspondingly opened on the top surface of the inner pot, and light-transmitting covers are arranged at the three through holes, and a light guide component is arranged between the LED light board and the light-transmitting cover, the light source is irradiated into the inner pot through the light guide component and the light-transmitting cover, thereby avoiding arranging the LED light board in the inner pot, so that the taking of food will not be disturbed by the lamp, and even if the food touches the light-transmitting cover, it will not affect the normal use of the lamp; the arrangement of the fixing part increases the contact area between the mounting frame and the inner pot, thereby improving the stability of the connection between the mounting frame and the inner pot.

[0015] Furthermore, the light guide assembly includes a glass light guide column and a silicone sleeve for the light guide column. The silicone sleeve for the light guide column is wrapped around the outside of the glass light guide column. The bottom of the silicone sleeve for the light guide column is fixedly connected to the mounting frame, so that the top of the glass light guide column is matched with the LED light board, and the bottom of the glass light guide column is located in the light-transmitting cover; the bottom of the silicone sleeve for the light guide column is evenly raised to form a limiting ring, and a second card groove is formed between two adjacent limiting rings. A second connecting hole is correspondingly provided at the top of the mounting frame. The second connecting hole is matched with the second card groove, and the diameter of the limiting ring is larger than the diameter of the second connecting hole. After the silicone sleeve for the light guide column is inserted into the second connecting hole, the limiting ring rests on the upper and lower sides of the mounting frame; the silicone sleeve for the light guide column adopts a hollow structure, and a second mounting cavity is provided in the center of the silicone sleeve for the light guide column. The second mounting cavity is matched with the glass light guide column. The upper end of the glass light guide column is located in the second installation cavity, and the length of the silicone sleeve of the light guide column is lower than that of the glass light guide column, so that the bottom of the glass light guide column is located in the installation frame; a light-transmitting hole is provided at the top of the silicone sleeve of the light guide column, and the diameter of the light-transmitting hole is smaller than the diameter of the second installation cavity; a fixing seat is connected to the top of the installation frame, and the fixing seat sleeve is arranged on the outside of the silicone sleeve of the light guide column; the upper and lower ends of the fixing seat are bent to form a mounting plate and a fixing plate, the mounting plate is located above the fixing plate, and the fixing plate is fixedly connected to the installation frame, and the top of the silicone sleeve of the light guide column extends from the mounting plate to form a base, and the base rests on the fixing plate; partition columns are provided at both ends of the base, and the LED light panel is fixed to the mounting plate through the partition columns, so that a gap is formed between the bottom surface of the LED light panel and the top surface of the silicone sleeve of the light guide column. The setting of the silicone sleeve of the light guide column plays a role in installing and fixing the glass light guide column, and also has a protective effect; because the silicone sleeve of the light guide column wraps the glass light guide column, the glass light guide column transmits the light of the LED light board to the inner pot, illuminating the inside of the inner pot, and at the same time, the setting of the glass light column allows the LED light board to be set on the outside of the inner pot, thereby avoiding collision with the LED light board during food taking, causing the lamp to be unusable; a second card slot is formed between two adjacent limit rings, which cooperates with the second connecting hole on the top of the mounting frame, and the second connecting hole and the card slot are connected by inserting the silicone sleeve of the light guide column into the second connecting hole. Matching connection, while the limit ring is against the upper and lower ends of the top of the mounting frame for limiting, so as to realize the fixed connection between the silicone sleeve of the light guide column and the mounting frame; the setting of the second mounting cavity facilitates the installation of the glass light guide column, while the length of the silicone sleeve of the light guide column is lower than the length of the glass light guide column, so that the bottom of the glass light guide column is not wrapped by the silicone sleeve of the light guide column and is located on the mounting frame, and the mounting frame adopts a frame structure, so that the light source can be converged and emitted from the light-transmitting cover; the light source of the LED light board is transmitted to the glass light guide column through the light-transmitting hole, while the diameter of the light-transmitting hole is smaller than the diameter of the second mounting cavity, so as to limit the installation of the glass light guide column. The fixing plate is used to install the fixing seat, and the mounting plate is used to limit the installation of the silicone sleeve of the light guide column; the setting of the separation column creates a gap between the LED light board and the silicone sleeve of the light guide column, which is convenient for the installation of the LED light board.

[0016] The present invention has the following beneficial effects due to the adoption of the above technical solution:

[0017] The present invention arranges a fan 1, an air duct and an air guide component on the top of the inner pot, so that the microwave frequency conversion board and the magnetron are placed in the air duct. When the microwave oven is working, the microwave frequency conversion board and the magnetron generate heat, and the fan 1 runs synchronously to suck the outside air into the air duct through the vent of the microwave oven cabinet to dissipate the heat of the microwave frequency conversion board and the magnetron. At the same time, the heat is blown into the inner pot of the microwave oven through the air guide component to provide a preheating effect for the microwave oven. When the temperature in the microwave oven rises, the air guide component closes the air duct and the inner pot, and the fan 1 continues to dissipate the heat of the microwave frequency conversion board and the magnetron.

[0018] The present invention installs a waveguide box on one side of the inner pot located at the radio frequency output end of the magnetron, and arranges a waveguide component at the waveguide box corresponding to the radio frequency output end, so that a waveguide cavity is formed between the waveguide box and the inner pot, and the radio frequency output end is located in the waveguide cavity. When the microwave oven is working, the microwave generated by the radio frequency output end is reflected by the waveguide component and the inner wall of the waveguide box, passes through the mica sheet at the microwave inlet of the inner pot and enters the inner pot, so as to heat the food in the inner pot. The arrangement of the waveguide component makes the microwave energy distribution range wide, reduces the energy accumulation at the end of the microwave, greatly improves the heating effect of the food, and ensures the uniform heating of the food.

[0019] In the present invention, switch 1 and switch 2 are arranged on the door lock plate, and a connecting rod is rotated on the door lock plate. When the door body is closed, the lock hook acts on switch 1 and pushes the connecting rod at the same time, so that the connecting rod acts on switch 2. The microwave oven can be started only when switch 1 and switch 2 are fully turned on. This can effectively prevent the microwave oven from being started when the oven door is open, thereby greatly improving the safety of using the microwave oven. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings:

[0021] Figure 1 It is a structural schematic diagram of the combined heating microwave oven structure of the present invention;

[0022] Figure 2 for Figure 1 A front view of

[0023] Figure 3 for Figure 2 Cross-section of the middle AA;

[0024] Figure 4 for Figure 2 Cross-section of the middle BB;

[0025] Figure 5 for Figure 2 Cross-section of the middle CC;

[0026] Figure 6 for Figure 2 Cross-section of the middle DD;

[0027] Figure 7 It is a structural schematic diagram of the connection between the air duct and the air guide assembly of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the air guide cover in the present invention;

[0029] Fig. 9 It is a schematic diagram of the structure inside the inner container of the present invention;

[0030] Fig.10 It is a structural schematic diagram of the electric control board in the present invention;

[0031] Fig.11 It is a structural schematic diagram of the light wave tube assembly in the present invention;

[0032] Fig.12 for Figure 4 Cross-section of EE;

[0033] Fig.13 It is a schematic diagram of the structure of the hot air component in the present invention;

[0034] Fig.14 It is a structural schematic diagram of the lamp assembly in the present invention;

[0035] Fig.15 for Fig.14 Cross-section of the middle FF;

[0036] Fig.16 This is a schematic diagram of the structure of the connection between the door lock plate and the micro switch in the first embodiment;

[0037] Fig.17 This is a schematic diagram of the structure of the door lock plate in the first embodiment;

[0038] Fig.18 It is a structural schematic diagram of the door lock plate in the second embodiment;

[0039] Fig.19 It is a structural schematic diagram of the connecting rod in the present invention;

[0040] Fig. 20 It is a structural schematic diagram of the switch 2 in the present invention;

[0041] Fig.21 It is a schematic diagram of the structure of the lock hook in the present invention;

[0042] In the figure, 1-box; 2-liner; 3-electric control board; 4-microwave frequency conversion board; 5-magnetron; 6-door; 7-heat dissipation assembly; 8-fan 1; 9-air duct; 10-air guide assembly; 11-cover; 12-bottom plate; 13-edge; 14-slot; 15-elastic buckle; 16-air guide cover; 17-air guide flap; 18-wind curtain air guide horizontal bar; 19-rotating seat; 20-hook 1; 21-hook 2; 22-spring 1; 23-wax motor; 24-light wave tube assembly; 25-fixed bracket; 26-reflector; 27-suspension seat; 2 8-light wave heating tube; 29-bottom cover; 30-installation cavity 1; 31-through hole 1; 32-hot air assembly; 33-air inlet; 34-air outlet; 35-fixed cover; 36-air guide bracket; 37-fixed support; 38-fan 2; 39-air guide plate; 40-assembly cavity; 41-installation groove; 42-heating tube spacer; 43-ring heating tube; 44-waveguide box; 45-waveguide cavity; 46-RF output end; 47-waveguide; 48-microwave inlet; 49-mica sheet; 50-semicircular steel ball; 51-interlayer; 52-heat dissipation hole; 53-choke slot; 54-choke slot plate; 55-lock hook; 56-door lock plate; 57-switch one; 58-switch two; 59-hinge shaft; 60-connecting rod; 61-shaft sleeve; 62-bending section; 63-pushing section; 64-upper limit block; 65-lower limit block; 66-limiting cavity; 67-limiting part; 68-locking mouth; 69-limiting convex part; 70-inclined part; 71-pressing plate; 72-pressing sheet; 73-positioning part; 74-through hole two; 75-positioning column; 77-installation part; 78-extrusion part; 79-connecting hole one; 80-spring Two; 81-through hole two; 82-threaded hole; 83-limiting screw; 84-limiting end; 85-lamp assembly; 86-LED light board; 87-mounting frame; 88-light guide assembly; 89-light-transmitting cover; 90-fixing part; 91-glass light guide column; 92-silicone sleeve of light guide column; 93-limiting ring; 94-slot; 95-connecting hole two; 96-mounting cavity two; 97-light-transmitting hole; 98-fixing seat; 99-mounting plate; 100-fixing plate; 101-base; 102-partition column; 103-mounting seat; 104-door frame. DETAILED DESCRIPTION

[0043] like Figures 1 to 21As shown, the structure of the combined heating microwave oven of the present invention comprises: a box body 1, in which an inner pot 2 is built; an electric control board 3, connected to one side of the inner pot 2 for power supply; a microwave frequency conversion board 4, used to adjust the power frequency; a magnetron 5, which generates microwaves for heating; a door body 6, connected to the front side of the box body 1, to control the switch of the inner pot 2; and also comprises: a heat dissipation component 7, arranged between the box body 1 and the inner pot 2, for dissipating the heat of the microwave frequency conversion board 4 and the magnetron 5; the heat dissipation component 7 comprises a fan 8, an air duct 9 and an air guide component 10, the fan 8 is fixedly connected to the inner pot 2, the air inlet of the fan 8 is matched with the vent of the box body 1, one end of the air duct 9 is connected with the fan 8, the microwave frequency conversion board 4 and the magnetron 5 are both arranged in the air duct 9, the air guide component 10 is arranged at the other end of the air duct 9, and the air guide component 10 is connected with the inner pot 2.

[0044] The air duct 9 is formed by the cover 11 being covered on the bottom plate 12, the bottom plate 12 is fixedly connected to the inner liner 2, the top surface of the bottom plate 12 is formed with an edge 13 corresponding to the cover 11 and protruding upward, the edge 13 is limited on both sides of the bottom of the cover 11, the edge 13 is provided with a card slot 14, the bottom of the cover 11 is correspondingly provided with an elastic buckle 15, and the elastic buckle 15 is clamped in the card slot 14; the air guide assembly 10 includes an air guide cover 16, an air guide flap 17 and a driving member, the air guide cover 16 is fixedly connected to the inner liner 2, one end of the air guide cover 16 is connected to the air duct 9, the air guide flap 17 is connected to the air guide cover 16 through the driving member, the inner liner 2 is provided with a through hole 1 corresponding to the air guide cover 16, the driving member controls the air guide cover 16 to open and close the through hole 1, and the inner liner 2 A wind curtain air guide bar 18 is provided at one place of the through hole; a rotating seat 19 is provided on the side of the air guide cover 16 close to the microwave oven door body 6, and a corresponding end of the air guide flap 17 is rotatably connected to the rotating seat 19, a hook 20 is provided on the side of the air guide cover 16 close to the door body 6, and a hook 21 is correspondingly provided at the other end of the air guide flap 17, and a spring 22 is connected between the hook 20 and the hook 21, and the spring 22 pulls the other end of the air guide flap 17 upward to open the through hole 1; the driving part adopts a wax motor 23; a motor mounting seat is provided on the air guide cover 16, and the wax motor 23 is fixedly connected to the motor mounting seat, and the output end of the wax motor 23 passes through the air guide cover 16 and acts on the air guide flap 17 to control the flipping of the air guide flap 17. The edge 13 limits the cover 11, and the elastic buckle 15 is locked in the slot 14, so that the bottom plate 12 and the cover 11 are fixed. When the microwave oven starts to work, the fan 8 dissipates heat to the microwave frequency conversion board 4 and the magnetron 5, and blows the heat into the air guide cover 16. The air guide flap 17 is initially in an open state, and the heat is blown in through the through hole 1 of the inner pot 2, and then blown into the microwave oven inner pot 2 evenly through the wind curtain air guide horizontal strip 18, which plays a preheating role; when the temperature of the microwave oven inner pot 2 rises to the set value, the wax expands and pushes the piston, triggering the mechanical action, and the wax motor 23 runs, thereby pushing the air guide flap 17 downward, thereby closing the through hole 1, avoiding the high temperature in the inner pot 2 affecting the heat dissipation of the microwave frequency conversion board 4 and the magnetron 5.

[0045] The microwave oven inner pot 2 also includes a light wave tube assembly 24. A mounting hole is provided at the top of the microwave oven inner pot 2. The light wave tube assembly 24 is fixed in the mounting hole. The light wave tube assembly 24 is used to heat the food in the microwave oven inner pot 2. The light wave tube assembly 24 includes a fixed bracket 25, a reflector 26, a hanging seat 27, a light wave heating tube 28 and a bottom cover 29. The top of the hanging seat 27 is fixedly connected to the two ends of the bottom of the fixed bracket 25, the bottom of the hanging seat 27 is fixedly connected to the top surface of the inner pot 2, the bottom cover 29 is fixedly connected to the bottom of the reflector 26, the light wave heating tube 28 is fixedly connected in an installation cavity 30 formed by the reflector 26 and the bottom cover 29, and the bottom cover 29 is evenly provided with through holes 31, so that the installation cavity 30 is connected to the microwave oven inner pot 2. The light wave tube assembly 24 irradiates the food in the inner pot 2, and performs a compensatory heating on the heat on the top of the food to make the food heated more evenly; it heats the food in the baking mode of the combined heating microwave oven, and assists in heating in the microwave mode. The setting of the reflector 26 is used to gather the tubes of the light wave heating tube 28 into the inner pot.

[0046] The hot air assembly 32 is also included. The hot air assembly 32 is arranged on the back of the inner liner 2. The center of the inner wall of the inner liner 2 is provided with an air suction port 33. The four corners of the inner wall of the inner liner 2 are provided with air outlets 34. The hot air assembly 32 includes a fixed cover 35, an air guide bracket 36, a fixed support 37, a fan 38 and an air guide plate 39. The fixed cover 35 matches the air suction port 33 and the air outlet 34 and is arranged on the back of the inner liner 2, so that an assembly cavity 40 is formed between the fixed cover 35 and the inner liner, and the inner liner 2 is connected to the assembly cavity 40. The back of the fixed cover 35 is The surface of the combined microwave oven is penetrated by a mounting groove 41, the fixed support 37 is fixedly connected in the mounting groove 41, the second fan 38 is located in the assembly cavity 40 and is fixedly connected to the fixed support 37, the air guide bracket 36 is located in the assembly cavity 40 and is fixedly connected to the fixed cover 35, and the air guide plate 39 is provided on the side of the air guide bracket 36 close to the inner pot 2, and the heating tube spacer 42 is also fixedly connected to the side of the air guide bracket 36 close to the inner pot 2, and the heating tube spacer 42 is fixedly connected to the annular heating tube 43, and the annular heating tube 43 is coiled on the outside of the second fan 38. In the baking mode of the combined microwave oven, the setting of the hot air component 32 allows the hot air in the inner pot 2 to circulate, thereby improving the uniformity of the temperature of the food; the setting of the air guide plate 39 increases the smoothness of the flow of the high-temperature gas in the inner pot 2, forming a circulating temperature field, so that the food is heated evenly, and the setting of the annular heating tube 43 makes the air blown out of the second fan 38 hot air, realizing the cooking method of baking in the combined microwave oven.

[0047] The invention also includes a waveguide box 44, which is fixedly connected to one side of the inner tank 2 to form a waveguide cavity 45. A radio frequency output terminal 46 is provided on one side of the magnetron 5, and the radio frequency output terminal 46 is located in the waveguide cavity 45. A waveguide component 47 is provided on the inner wall of the waveguide box 44 away from the inner tank 2. A microwave inlet 48 is opened in the inner tank 2 corresponding to the waveguide component 47. A mica sheet 49 is provided in the microwave inlet 48. The waveguide component 47 adopts a semicircular steel ball 50. An interlayer 51 is provided on the bottom of the waveguide box 44 away from the inner tank 2, and a heat dissipation hole 52 is provided on the outer wall of the interlayer 51. A waveguide box 44 is installed on one side of the inner pot 2 at the RF output end 46 of the magnetron 5, and a waveguide member 47 is arranged at the waveguide box 44 corresponding to the RF output end 46, so that a waveguide cavity 45 is formed between the waveguide box 44 and the inner pot 2, and the RF output end 46 is located in the waveguide cavity 45. When the microwave oven is working, the microwave generated by the RF output end 46 is reflected by the waveguide member 47 and the inner wall of the waveguide box 44, and passes through the mica sheet 49 at the microwave inlet 48 of the inner pot 2 into the inner pot 2 to heat the food in the inner pot 2. The arrangement of the waveguide member 47 makes the microwave energy distribution range wide, reduces the energy accumulation at the end of the microwave, greatly improves the heating effect of the food, and ensures that the food is heated evenly. Due to the curved surface structure of the semicircular steel ball, the microwaves generated by the RF output end 46 are absorbed by the surface of the semicircular steel ball 50 to form multi-angle reflection, breaking through the single reflection path limitation of the traditional planar waveguide box 44. Through the scattering effect, the microwave energy distribution range is wider, reducing the energy accumulation at the end of the waveguide, so that the food is heated evenly and the food heating efficiency is improved; by setting the interlayer 51, the energy escape or invalid scattering of microwaves during the transmission process of the waveguide box 44 is reduced, and the transmission efficiency of microwaves from the magnetron 5 to the inner pot 2 is improved; the interlayer 51 also has a shielding effect, and through multi-level reflection, it limits the diffusion of microwaves to non-target areas, reducing the potential harm of microwave leakage to the human body and the environment; at the same time, due to the setting of the waveguide 47, heat will accumulate at the bottom of the waveguide away from the inner pot 2, and the interlayer 51 also has a heat-insulating effect. Accelerate the transfer of heat from the interlayer 51 to the outside to avoid heat accumulation in the interlayer 51 and overheating of components; at the same time, promote and control the formation of convection between the interlayer 51 and the external environment, improve the heat exchange efficiency, and reduce the operating temperature of core components such as the magnetron 5. At the same time, the heat dissipation holes 52 destroy the symmetry of the microwave reflection path and reduce the probability of standing wave formation, thereby reducing the abnormal accumulation of microwave energy in a specific area; a choke slot plate 54 is set in the microwave oven door body 6. One is to scatter the microwaves transmitted to the door body 6 back to the inner pot 2 through the choke slot plate 54, and it also has a screen microwave effect. Through multi-level reflection, it limits the diffusion of microwaves to non-target areas, thereby reducing the potential harm of microwave leakage to the human body and the environment.

[0048] One side of the electric control board 3 is fixedly connected to one side of the inner pot 2 through the mounting seat 103. The mounting seat 103 adopts a metal structure. A choke slot 53 is provided on the side of the mounting seat 103 close to the inner pot 2, and a choke slot plate 54 is provided in the door body 6. The mounting seat 103 is used to fix the electric control board 3; the metal structure ensures the structural strength of the mounting seat 103, improves the service life, and enhances the reflection ability of microwaves, reduces the possibility of microwaves penetrating into the area of ​​the electric control board 3, and prevents microwaves from interfering with electronic components or causing safety hazards. The design of the choke slot 53 utilizes the principle of microwave reflection to reflect the microwave energy at the connection between the mounting base 103 of the electric control board 3 and the inner pot 2 back into the oven cavity, thereby reducing the risk of microwave leakage from the gap of the mounting base 103 to the electric control area, preventing interference with electronic components or causing safety hazards; improving the absorption and reflection efficiency of high-frequency electromagnetic waves, and ensuring the stability of the working environment of the electric control board 3; and by suppressing microwave leakage, the choke slot 53 reduces energy loss, improves the utilization rate of microwave energy in the inner pot 2, and reduces the load pressure of the magnetron 5; at the same time, it avoids the thermal effect of microwaves on the components of the electric control board 3 and extends the service life of the equipment; a choke slot plate 54 is set in the microwave oven door body 6, one of which is to scatter the microwaves transmitted to the door body 6 back to the inner pot 2 through the choke slot plate 54, and it also has the effect of shielding microwaves, and limits the diffusion of microwaves to non-target areas through multi-stage reflection, reducing the potential harm of microwave leakage to the human body and the environment.

[0049] The box body 1 is provided with a door frame 104 corresponding to the door body 6, and the door body 6 is connected with a lock hook 55. The door frame 104 is fixedly connected with a door lock plate 56. A micro switch is installed on the door lock plate 56. The lock hook 55 acts on the micro switch. The micro switch is provided with a switch 1 57 and a switch 2 58. A hinge shaft 59 is fixed on the door lock plate 56. A connecting rod 60 is connected to the hinge shaft 59. The connecting rod 60 is matched with the lock hook 55; the connecting rod 60 includes a shaft sleeve 61, a bending section 62 and a pushing section 63. The bending section 62 is located between the shaft sleeve 61 and the pushing section 63. The shaft sleeve 61 is sleeved on the outer side of the hinge shaft 59. The pushing section 63 is matched with the lock hook 55, and the bending section 62 is matched with the switch 2 58. The outer wall of the shaft sleeve 61 is provided with an upper limit block 64 and a lower limit block 65, the lower limit block 65 is located below the upper limit block 64, and a limit cavity 66 is formed between the lower limit block 65 and the upper limit block 64, and the door lock plate 56 is provided with a limit portion 67 correspondingly, and the limit portion 67 is limited in the limit cavity 66, so that the shaft sleeve 61 is limited on the hinge shaft 59; the door lock plate 56 is provided with a lock hole 68 corresponding to the lock hook 55, and the lock hole 68 protrudes to the side away from the lock hook 55 to form a limit convex portion 69, and the limit convex portion 69 limits the push section 63, and the lock hole 68 is provided with an inclined portion 70 on the side close to the lock hook 55, and the inclined portion 70 guides the entry and retreat of the lock hook 55; the protrusion on the door lock plate 56 A clamping plate 71 is formed, and a clamping sheet 72 is provided on the clamping plate 71. The clamping sheet 72 abuts against the top surface of the switch 1 57 and the switch 2 58 and is limited on the door lock plate 56; the door lock plate 56 is formed with a positioning portion 73 corresponding to the clamping plate 71 protrusion, and the clamping plate 71 abuts against one side of the switch 1 57 and one side of the switch 2 58, and the positioning portion 73 abuts against the other side of the switch 1 57 and the other side of the switch 2 58; the switch 1 57 and the switch 2 58 are both provided with a through hole 2 74, and the mounting plate is correspondingly provided with a positioning column 75, and the positioning column 75 is inserted into the through hole 2 74; the door lock plate 56 is formed with a positioning portion 73 corresponding to the clamping plate 71 protrusion, and the clamping plate 71 abuts against one side of the switch 1 57 and the switch 2 58, the positioning portion 73 abuts against the other side of the switch 1 57 and the other side of the switch 2 58; the lock hook includes a mounting portion 77 and an extrusion portion 78, the extrusion portion 78 is connected to the side of the mounting portion 77 close to the door lock plate 56, the bottom of the mounting portion 77 is provided with a connecting hole 1 79, the connecting hole 1 79 is used to hang the connecting spring 2 80, and the top of the mounting portion 77 is provided with a through hole 2 81 for hinged connection to the door body 6; when the door body 6 is closed, the extrusion portion 78 acts on the switch 1 57 and pushes the pushing section 63 of the connecting rod 60, and the connecting rod 60 rotates around the hinge shaft 59, so that the bending section 62 acts on the switch 2 58, and the mounting portion 77 and the extrusion portion 78 adopt an integrally formed structure;By arranging switch 1 57 and switch 2 58 on door lock plate 56, and rotating connecting rod 60 on door lock plate 56, when door body 6 is closed, lock hook 55 acts on switch 1 57 and pushes connecting rod 60 at the same time, so that connecting rod 60 acts on switch 2 58. The microwave oven can be started only after switch 1 57 and switch 2 58 are fully turned on, which can effectively prevent the microwave oven from being started when the oven door is open, greatly improving the safety of using the microwave oven. The shaft sleeve 61 is set on the outer side of hinge shaft 59 to realize the rotation of connecting rod 60. When the microwave oven door is closed, lock hook 55 is inserted into door lock plate 56, so that the end of lock hook 55 acts on switch 1 57, and lock hook 55 pushes pushing section 63 at the same time, so that connecting rod 60 rotates around hinge shaft 59, and controls bending section 62 to act on switch 2 58. The limiting portion 67 is limited between the upper limiting block 64 and the lower limiting block 65, so that the shaft sleeve 61 is limited to the outside of the hinge shaft 59. The setting of the inclined portion 70 facilitates the insertion of the lock hook 55 of the microwave oven into the door lock plate 56. The setting of the inclined portion 70 also has a certain guiding effect, which facilitates the entry and exit of the lock hook 55 from the lock port 68. The pressing plate 71 is against one side of the switch 1 57 and the switch 2 58, and the setting of the pressing sheet 72 limits the switch 1 57 and the switch 2 58 on the door lock plate 56. The setting of the positioning column 75 is inserted into the through hole 2 74, and the setting of the positioning column 75 plays a role in quickly positioning the installation of the switch 1 57 and the switch 2 58. The positioning portion 73 cooperates with the pressing plate 71 to limit and fix the two sides of the switch 1 57 and the switch 2 58, so that the switch 1 57 and the switch are fixed on the door lock plate 56, eliminating the need for screw fixation, and the switch 1 57 and the switch are simple and convenient to disassemble and assemble. The installation part 77 is used to install the connecting lock hook 55. When the door body 6 is closed, the extrusion part 78 is inserted into the lock port 68, first acting on the switch 1 57, and then pushing the connecting rod 60, so that the connecting rod 60 acts on the switch 2 58, so that the microwave oven detects that the door body 6 is closed, and then turns on the power to work normally. The installation part 77 and the extrusion part 78 are set in an integrated structure, which improves the structural strength of the lock hook 55 and ensures the stability of the door lock switch.

[0050] The utility model also includes a lamp assembly 85, which includes an LED light board 86 and a mounting frame 87. The mounting frame 87 is fixedly connected to the inner liner 2, and the LED light board 86 is fixedly connected to the top of the mounting frame 87. A light guide assembly 88 is arranged in the mounting frame 87, and the top of the light guide assembly 88 is matched with the LED light board 86. A through hole three is arranged on the top of the inner liner 2 corresponding to the light guide assembly 88, and the bottom of the light guide assembly 88 is located in the through hole three. A light-transmitting cover 89 is arranged on the top surface of the inner liner 2 at the through hole three. The mounting frame 87 adopts a frame structure, and fixed parts 90 are extended on both sides of the bottom of the mounting frame 87, and the fixed parts 90 are fixedly connected to the inner liner 2; the light-transmitting cover 89 adopts a hemispherical structure. By setting a mounting frame 87 on the top surface of the inner pot 2, and fixing the LED light board 86 on the top of the mounting frame 87, three through holes are opened on the top surface of the inner pot 2, and light-transmitting covers 89 are covered at the three through holes, and a light guide component 88 is set between the LED light board 86 and the light-transmitting cover 89, the light source is irradiated into the inner pot 2 through the light guide component 88 and the light-transmitting cover 89, avoiding setting the LED light board 86 in the inner pot 2, so that the taking of food will not be disturbed by the lamp, and even if the food touches the light-transmitting cover 89, it will not affect the normal use of the lamp; the setting of the fixing part 90 increases the contact area between the mounting frame 87 and the inner pot 2, thereby improving the stability of the connection between the mounting frame 87 and the inner pot 2.

[0051] The light guide assembly 88 includes a glass light guide column 91 and a light guide column silicone sleeve 92. The light guide column silicone sleeve 92 is wrapped around the outside of the glass light guide column 91. The bottom of the light guide column silicone sleeve 92 is fixedly connected to the mounting frame 87, so that the top of the glass light guide column 91 is matched with the LED light board 86, and the bottom of the glass light guide column 91 is located in the light-transmitting cover 89; the bottom of the light guide column silicone sleeve 92 is evenly raised to form a limit ring 93, and a card slot 94 is formed between two adjacent limit rings 93. The top of the mounting frame 87 is provided with a second connection hole 95, which is matched with the second card slot 94. The diameter of the limiting ring 93 is larger than the diameter of the second connection hole 95. After the light guide column silicone sleeve 92 is inserted into the second connection hole 95, the limiting ring 93 abuts against the upper and lower sides of the mounting frame 87. The light guide column silicone sleeve 92 adopts a hollow structure, and the center of the light guide column silicone sleeve 92 is provided with a second installation cavity 96, which is matched with the glass light guide column 91. The upper end of the glass light guide column 91 Located in the second mounting cavity 96, the length of the light guide column silicone sleeve 92 is shorter than the length of the glass light guide column 91, so that the bottom of the glass light guide column 91 is located in the mounting frame 87; the top of the light guide column silicone sleeve 92 is provided with a light transmission hole 97, and the diameter of the light transmission hole 97 is smaller than the diameter of the second mounting cavity 96; the top of the mounting frame 87 is connected to a fixing seat 98, and the fixing seat 98 is sleeved on the outside of the light guide column silicone sleeve 92; the upper and lower ends of the fixing seat 98 are bent to form a mounting piece 99 and a fixing piece 100 The mounting piece 99 is located above the fixing piece 100, and the fixing piece 100 is fixedly connected to the mounting frame 87. A base 101 is formed by extending from the top of the light guide column silicone sleeve 92 corresponding to the mounting piece 99, and the base 101 is against the fixing piece 100; partition columns 102 are provided at both ends of the base 101, and the LED light board 86 is fixed to the mounting piece 99 through the partition columns 102, so that a gap is formed between the bottom surface of the LED light board 86 and the top surface of the light guide column silicone sleeve 92.The setting of the light guide silicone sleeve 92 plays a role in installing and fixing the glass light guide 91, and also has a protective effect; because the light guide silicone sleeve 92 wraps the glass light guide 91, the glass light guide 91 transmits the light of the LED light board 86 to the inner pot 2, illuminating the inside of the inner pot 2. At the same time, the setting of the glass light column allows the LED light board 86 to be set on the outside of the inner pot 2, thereby avoiding collision with the LED light board 86 during food taking, causing the lamp to be unusable; a second card slot 94 is formed between two adjacent limit rings 93, which cooperates with the second connecting hole 95 at the top of the mounting frame 87, and the second connecting hole 95 is matched with the second card slot 94 by inserting the light guide silicone sleeve 92 into the second connecting hole 95. The glass light guide column 91 is connected to the glass light guide column 91, and the limit ring 93 is pressed against the upper and lower ends of the top of the mounting frame 87 for limiting, so that the silicone sleeve 92 of the light guide column is fixedly connected to the mounting frame 87; the setting of the second mounting cavity 96 is convenient for the installation of the glass light guide column 91, and the length of the silicone sleeve 92 of the light guide column is lower than the length of the glass light guide column 91, so that the bottom of the glass light guide column 91 is not wrapped by the silicone sleeve 92 of the light guide column and is located on the mounting frame 87, and the mounting frame 87 adopts a frame structure, so that the light source can be converged and emitted from the light-transmitting cover 89; the light source of the LED light panel 86 is transmitted to the glass light guide column 91 through the light-transmitting hole 97, and the diameter of the light-transmitting hole 97 is smaller than the diameter of the second mounting cavity 96, thereby playing a limiting role in the installation of the glass light guide column 91. The fixing plate 100 is used to install the fixing seat 98, and the mounting plate 99 is used to limit the installation of the light guide column silicone sleeve 92; the setting of the separating column 102 creates a gap between the LED light board 86 and the light guide column silicone sleeve 92, which facilitates the installation of the LED light board 86.

[0052] like Fig.16 and Fig.17 As shown in the first embodiment of the present invention, the hinge shaft 59 is provided with a threaded hole 82, and a limit screw 83 is connected in the threaded hole 82. By screwing in the limit screw 83, the shaft sleeve 61 is limited on the hinge shaft 59.

[0053] like Fig.18 As shown in the second embodiment of the present invention, a limiting end portion 84 is provided at the top of the hinge shaft 59, and the outer diameter of the limiting end portion 84 is larger than the inner diameter of the shaft sleeve 61. After the hinge shaft 59 is injection molded, the shaft sleeve 61 is sleeved on the outer side of the hinge shaft 59, and the top of the hinge shaft 59 is hot-pressed to deform the top of the hinge shaft 59 to form the limiting end portion 84, and the outer diameter of the limiting end portion 84 is larger than the inner diameter of the shaft sleeve 61, so that the shaft sleeve 61 is limited on the hinge shaft 59.

[0054] The present invention arranges a fan 8, an air duct 9 and an air guide assembly 10 on the top of the inner pot 2, so that the microwave frequency conversion board 4 and the magnetron 5 are both placed in the air duct 9. When the microwave oven is working, the microwave frequency conversion board 4 and the magnetron 5 generate heat, and the fan 8 runs synchronously to suck the outside air into the air duct 9 through the vent of the microwave oven body 1 to dissipate the heat of the microwave frequency conversion board 4 and the magnetron 5. At the same time, the heat is blown into the microwave oven inner pot 2 through the air guide assembly 10 to provide a preheating effect for the microwave oven. When the temperature in the microwave oven rises, the air guide assembly 10 closes the air duct 9 and the inner pot 2, and the fan 8 continues to dissipate the heat of the microwave frequency conversion board 4 and the magnetron 5.

[0055] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. Combined heating microwave oven structure, including: A box body, with an inner tank built in; An electric control board, connected to one side of the inner tank, for power supply; Microwave frequency conversion board, used to adjust the power frequency; magnetron, which generates microwaves for heating; A door body, connected to the front side of the box body, controls the switch of the inner tank; The invention is characterized in that it also includes: A heat dissipation component, disposed between the box body and the inner tank, for dissipating heat from the microwave frequency conversion board and the magnetron; The heat dissipation component includes a fan 1, an air duct and an air guide component. The fan 1 is fixedly connected to the inner tank. The air inlet of the fan 1 is matched with the ventilation port of the box. One end of the air duct is connected to the fan 1. The microwave frequency conversion board and the magnetron are both arranged in the air duct. The air guide component is arranged at the other end of the air duct, and the air guide component is connected to the inner tank.

2. The combined heating microwave oven structure according to claim 1, characterized in that: The air duct is formed by a cover being arranged on a bottom plate, the bottom plate being fixedly connected to the inner tank, the top surface of the bottom plate being formed with an edge protruding upward corresponding to the cover, the edge being limited at both sides of the bottom of the cover, the edge being provided with a card slot one, the bottom of the cover being provided with an elastic card buckle correspondingly, the elastic card buckle being clamped in the card slot one; the air guide assembly comprises an air guide cover, an air guide flap and a driving member, the air guide cover being fixedly connected to the inner tank, one end of the air guide cover being connected to the air duct, the air guide flap being connected to the air guide cover through the driving member, the inner tank being provided with a through hole one corresponding to the air guide cover, the driving member controlling the air guide cover to switch the through hole one, and the inner tank A wind curtain air guide bar is provided at one place of the through hole; a rotating seat is provided on the side of the air guide cover close to the microwave oven door body, and a corresponding end of the air guide flap is rotatably connected to the rotating seat; a hook is provided on the side of the air guide cover close to the door body, and a hook is provided at the other end of the air guide flap, and a spring is connected between the hook one and the hook two, and the spring pulls the other end of the air guide flap upward to open the through hole one; the driving part adopts a wax motor; a motor mounting seat is provided on the air guide cover, and the wax motor is fixedly connected to the motor mounting seat, and the output end of the wax motor passes through the air guide cover and acts on the air guide flap to control the flipping of the air guide flap.

3. The combined heating microwave oven structure according to claim 1, characterized in that: It also includes a light wave tube assembly, a mounting hole is provided at the top of the microwave oven inner pot, the light wave tube assembly is fixed in the mounting hole, and the light wave tube assembly is used to heat food in the microwave oven inner pot; the light wave tube assembly includes a fixed bracket, a reflector, a hanging seat, a light wave heating tube and a bottom cover, the top of the hanging seat is fixedly connected to the two ends of the bottom of the fixed bracket, the bottom of the hanging seat is fixedly connected to the top surface of the inner pot, the bottom cover is fixedly connected to the bottom of the reflector, the light wave heating tube is fixedly connected to an installation cavity one formed by the reflector and the bottom cover, and the bottom cover is evenly provided with through holes one, so that the installation cavity one is connected to the microwave oven inner pot.

4. The combined heating microwave oven structure according to claim 1, characterized in that: The hood is provided with an air inlet at the center of the inner wall of the liner, and air outlets are arranged at the four corners of the inner wall of the liner. The hot air assembly comprises a fixed cover, an air guide bracket, a fixed support, a second fan and an air guide plate. The fixed cover matches the air inlet, and the air outlet cover is arranged on the back of the liner, so that an assembly cavity is formed between the fixed cover and the liner, and the liner is connected to the assembly cavity. A mounting groove runs through the back of the fixed cover, and the fixed support is fixedly connected to the mounting groove. The second fan is located in the assembly cavity and is fixedly connected to the fixed support. The air guide bracket is located in the assembly cavity and is fixedly connected to the fixed cover. An air guide plate is provided on a side of the air guide bracket close to the liner, and a heating tube spacer is also fixedly connected to a side of the air guide bracket close to the liner. The heating tube spacer is fixedly connected to an annular heating tube, and the annular heating tube is coiled on the outside of the second fan.

5. The combined heating microwave oven structure according to claim 1, characterized in that: It also includes a waveguide box, which is fixedly connected to one side of the inner tank to form a waveguide cavity. A radio frequency output end is provided on one side of the magnetron, and the radio frequency output end is located in the waveguide cavity. A waveguide part is provided on the inner wall of the waveguide box away from the inner tank. A microwave entrance port is opened in the inner tank corresponding to the waveguide part. A mica sheet is provided in the microwave entrance port. The waveguide part adopts a semicircular steel ball. An interlayer is provided on the bottom of the waveguide box away from the inner tank, and a heat dissipation hole is provided on the outer wall of the interlayer.

6. The combined heating microwave oven structure according to claim 1, characterized in that: One side of the electric control board is fixedly connected to one side of the inner tank via a mounting base, the mounting base is of a metal structure, a choke slot is provided on one side of the mounting base close to the inner tank, and a choke slot plate is provided in the door body.

7. The combined heating microwave oven structure according to claim 1, characterized in that: The box body is provided with a door frame corresponding to the door body, the door body is connected with a lock hook, the door frame is fixedly connected with a door lock plate correspondingly, a micro switch is installed on the door lock plate, the lock hook acts on the micro switch, the micro switch is provided with switch 1 and switch 2, a hinge shaft is fixed on the door lock plate, a connecting rod is connected to the hinge shaft, and the connecting rod is matched with the lock hook; the connecting rod includes a shaft sleeve, a bending section and a pushing section, the bending section is located between the shaft sleeve and the pushing section, the shaft sleeve is sleeved on the outer side of the hinge shaft, the pushing section is matched with the lock hook, and the bending section is matched with the switch 2; the outer side of the shaft sleeve The side wall is provided with an upper limit block and a lower limit block, the lower limit block is located below the upper limit block, a limit cavity is formed between the lower limit block and the upper limit block, the door lock plate is correspondingly provided with a limit portion, the limit portion is limited in the limit cavity, so that the sleeve is limited on the hinge shaft; the door lock plate is provided with a lock opening corresponding to the lock hook, the lock opening protrudes to the side away from the lock hook to form a limit convex portion, the limit convex portion limits the pushing section, and the lock opening is provided with an inclined portion on the side close to the lock hook, and the inclined portion guides the entry and retreat of the lock hook; a pressing plate is formed on the door lock plate, and the pressing plate is provided with a pressing sheet, The pressing sheet is against the top surfaces of the switch one and the switch two and is limited on the door lock plate; the door lock plate is formed with a positioning portion corresponding to the protrusion of the pressing plate, the pressing plate is respectively against one side of the switch one and one side of the switch two, and the positioning portion is against the other side of the switch one and the other side of the switch two; the switch one and the switch two are both provided with a through hole two, the mounting plate is correspondingly provided with a positioning column, and the positioning column is inserted into the through hole two; the door lock plate is formed with a positioning portion corresponding to the protrusion of the pressing plate, the pressing plates are respectively against one side of the switch one and one side of the switch two, and the positioning portion is against the other side of the switch one and the other side of the switch two. The other side of the switch 2; the lock hook includes a mounting portion and an extrusion portion, the extrusion portion is connected to a side of the mounting portion close to the door lock plate, a connecting hole 1 is provided at the bottom of the mounting portion, the connecting hole 1 is used to hang a connecting spring 2, and a through hole 2 is provided at the top of the mounting portion for hinged connection to the door body; when the door body is closed, the extrusion portion acts on the switch 1 and pushes the pushing section of the connecting rod, the connecting rod rotates around the hinge axis so that the bending section acts on the switch 2, and the mounting portion and the extrusion portion adopt an integrally formed structure; the hinge axis is provided with a threaded hole, and a limiting screw is connected in the threaded hole.

8. The combined heating microwave oven structure according to claim 7, characterized in that: A limiting end portion is provided at the top of the hinge shaft, and the outer diameter of the limiting end portion is greater than the inner diameter of the shaft sleeve.

9. The combined heating microwave oven structure according to claim 1, characterized in that: It also includes a lamp assembly, which includes an LED light board and a mounting frame, the mounting frame is fixedly connected to the inner tank, the LED light board is fixedly connected to the top of the mounting frame, a light guide assembly is arranged in the mounting frame, the top of the light guide assembly is matched with the LED light board, a through hole three is arranged on the top of the inner tank corresponding to the light guide assembly, the bottom of the light guide assembly is located in the through hole three, a light-transmitting cover is arranged on the top surface of the inner tank located at the through hole three, the mounting frame adopts a frame structure, and fixed parts are extended on both sides of the bottom of the mounting frame, and the fixed parts are fixedly connected to the inner tank; the light-transmitting cover adopts a hemispherical structure.

10. The combined heating microwave oven structure according to claim 9, characterized in that: The light guide assembly includes a glass light guide column and a silicone sleeve for the light guide column, the silicone sleeve for the light guide column is wrapped around the outside of the glass light guide column, the bottom of the silicone sleeve for the light guide column is fixedly connected to the mounting frame, so that the top of the glass light guide column is matched with the LED light board, and the bottom of the glass light guide column is located in the light-transmitting cover; the bottom of the silicone sleeve for the light guide column is evenly raised to form a limiting ring, and a second card groove is formed between two adjacent limiting rings, and a second connecting hole is correspondingly provided at the top of the mounting frame, and the second connecting hole is matched with the second card groove, and the diameter of the limiting ring is larger than the diameter of the second connecting hole, and after the silicone sleeve for the light guide column is inserted into the second connecting hole, the limiting ring abuts against the upper and lower sides of the mounting frame; the silicone sleeve for the light guide column adopts a hollow structure, and a second installation cavity is provided in the center of the silicone sleeve for the light guide column, and the second installation cavity is matched with the glass light guide column. The upper end of the column is located in the second mounting cavity, and the length of the silicone sleeve of the light guide column is shorter than the length of the glass light guide column, so that the bottom of the glass light guide column is located in the mounting frame; a light-transmitting hole is provided at the top of the silicone sleeve of the light guide column, and the diameter of the light-transmitting hole is smaller than the diameter of the second mounting cavity; a fixing seat is connected to the top of the mounting frame, and the fixing seat sleeve is arranged on the outside of the silicone sleeve of the light guide column; the upper and lower ends of the fixing seat are bent to form a mounting plate and a fixing plate, the mounting plate is located above the fixing plate, and the fixing plate is fixedly connected to the mounting frame, and the top of the silicone sleeve of the light guide column extends to form a base corresponding to the mounting plate, and the base rests on the fixing plate; partition columns are provided at both ends of the base, and the LED light panel is fixed to the mounting plate through the partition columns, so that a gap is formed between the bottom surface of the LED light panel and the top surface of the silicone sleeve of the light guide column.

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