Air duct system of steamer and microwave oven integrated machine

Abstract

An air duct system of a steamer and microwave oven integrated machine comprises a cooking cavity and an air guide plate assembly installed on the cooking cavity, the cooking cavity is provided with an air outlet hole connected to the air inlet of the air guide plate assembly, the air guide plate assembly discharges the steam in the cooking cavity to the outside of the cooking cavity, and is characterized in that: the cooking cavity is also provided with an air inlet hole, a hot air device is installed outside the cooking cavity, and the air outlet of the hot air device is connected to the air inlet hole through an air valve. The advantages of the present invention are that the air duct system of the steamer and microwave oven integrated machine can exert a driving force on the water vapor in the cooking cavity on the one hand, so that the water vapor in the cooking cavity is discharged more smoothly, and on the other hand, it can slow down the condensation of water vapor and reduce the condensed water in the cooking cavity in the microwave mode.

Description

Technical Field

[0001] The invention relates to a household appliance, in particular to an air duct system of a steamer and microwave oven integrated machine. 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. The functions of these kitchen appliances are relatively simple, and each product needs to occupy a certain space in the kitchen. In order to effectively utilize the kitchen space and enrich the use functions of a single product, many microwave ovens with steam functions have appeared in the prior art. For example, the "A microwave oven for dual-purpose cooking with microwaves and steam" disclosed in the Chinese invention patent application with patent number ZL 201110231072.3 (authorization announcement number CN 102331008 A) can directly heat food with microwaves, and can also steam cook food with steam generated by heating water with microwaves. This type of microwave oven requires a water container for generating water vapor to be placed in the microwave oven cavity, but the volume of the microwave oven cavity is not large to begin with. After placing a special water container, the space becomes even smaller, resulting in a very effective space for steaming food. Therefore, the space utilization rate of the microwave oven cavity is low. Another example is the "Microwave Oven with Steam Function" disclosed in the Chinese utility model patent with patent number ZL 200920185932.2 (authorization announcement number CN 201439958U). In this microwave oven, a steamer is placed in the microwave oven cavity, and then the outlet of the steam generator is connected to the steamer through a steam duct. This method requires placing a steamer specifically for steaming food in the microwave oven cavity, which is not very convenient to use.

[0003] In order to overcome the defects of the existing microwave ovens with steam functions, people have invented a steamer-microwave oven all-in-one. Steam components and microwave components are arranged in the box of the all-in-one. When the steam function is used, the steam generated by the steam component enters the cooking chamber cavity. When the microwave function is used, the microwave generated by the microwave component enters the cooking chamber cavity. When the microwave mode is turned on in the existing steamer-microwave oven all-in-one, some water molecules in the food will evaporate to form water vapor under the action of microwaves. The external exhaust device includes an air guide plate and a cross-flow fan. When the cross-flow fan is working, a certain negative pressure will be formed at the steam outlet. Due to the small negative pressure, the water vapor in the cooking cavity cannot be discharged smoothly and in time. The water vapor will slowly gather on the wall of the cooking cavity to form condensed water, affecting the cooking experience. In summary, the structure of the existing steamer-microwave oven all-in-one needs to be further improved. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an air duct system for a steamer-microwave oven integrated machine capable of reducing condensed water in a cooking cavity in a microwave mode in view of the above-mentioned existing technical status.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: the air duct system of the integrated steamer and microwave oven includes a cooking cavity and an air guide plate assembly installed on the cooking cavity, the cooking cavity is provided with an air outlet hole connected to the air inlet of the air guide plate assembly, the air guide plate assembly discharges the steam in the cooking cavity to the outside of the cooking cavity, and is characterized in that: the cooking cavity is also provided with an air inlet hole, a hot air device is installed outside the cooking cavity, and the air outlet of the hot air device is connected to the air inlet hole through an air valve.

[0006] The hot air device can have a variety of structures. Preferably, the hot air device includes a rear plate, a fan assembly, a magnetron and an air guide cover. The fan assembly is arranged on the front side of the rear plate and installed on the rear plate. The fan assembly, magnetron and air guide cover are arranged in sequence from back to front. A rear air inlet is opened on the rear plate, and an air outlet is opened on the air guide cover to constitute the air outlet of the hot air device. The rear air inlet is connected to the air outlet through the fan assembly and the magnetron.

[0007] In order to ensure that the airflow coming in from the air inlet of the rear plate can smoothly enter the air guide cover, the fan assembly includes a fan bracket, a fan blade fan and fan blades. The fan bracket is installed on the rear plate, the fan blade fan is installed on the fan bracket, and the fan blades are installed on the fan blade fan. The air inlet of the magnetron faces the fan blades, and the air outlet of the magnetron faces the air inlet of the air guide cover.

[0008] As a preferred embodiment, the air valve is a three-way air valve, which has an air inlet, a first air outlet and a second air outlet. The air outlet of the hot air device is connected to the air inlet of the three-way air valve through an air pipe, the first air outlet of the three-way air valve is connected to the air inlet hole of the cooking cavity through an air inlet joint, and the second air outlet of the three-way air valve is connected to the outside of the all-in-one machine.

[0009] As another preferred embodiment, the air valve is a two-way one-way air valve, the air outlet of the hot air device is connected to the air inlet of the two-way one-way air valve through an air pipe, and the air outlet of the two-way one-way air valve is connected to the air inlet hole of the cooking cavity through an air inlet joint.

[0010] In order to allow the steam in the cooking cavity to be smoothly discharged into the air guide plate assembly, the all-in-one machine also includes an exhaust joint, which is arranged on the outside of the cooking cavity and covers the air outlet, and the exhaust joint is connected to the air inlet of the air guide plate assembly through an air guide pipe.

[0011] In order to make the exhaust smoother, the air inlet and the air outlet are arranged opposite to each other.

[0012] In order to prevent microwave leakage, the diameters of the air inlet and the air outlet are 3 mm to 5 mm.

[0013] Further preferably, the air inlet and the air outlet are both circular holes.

[0014] The air guide plate assembly can have a variety of structures. Preferably, the air guide plate assembly includes an air guide plate and a cross-flow fan. The air inlet of the air guide plate is connected to the air outlet of the cooking cavity, the air outlet of the air guide plate faces the air inlet of the cross-flow fan, and the air outlet of the cross-flow fan faces the outside of the all-in-one machine.

[0015] As a preferred embodiment of any of the above solutions, the integrated machine also includes a controller for controlling the opening and closing of the gas valve.

[0016] Compared with the prior art, the advantages of the present invention are: the air duct system of the steamer and microwave oven is configured with an air inlet hole on the cooking cavity, and a hot air device is installed outside the cooking cavity to supply air to the air inlet hole. On the one hand, it can exert a driving force on the water vapor in the cooking cavity to promote the water vapor in the cooking cavity to be discharged more smoothly; on the other hand, it can slow down the condensation of water vapor and reduce the condensed water in the cooking cavity in the microwave mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0018] Figure 2 It is a structural schematic diagram of another embodiment of the present invention from a different angle;

[0019] Figure 3 It is a structural schematic diagram of another embodiment of the present invention from a different angle;

[0020] Figure 4 It is a structural schematic diagram of another embodiment of the present invention from a different angle;

[0021] Figure 5 It is a schematic structural diagram of another embodiment of the present invention from a different angle. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below with reference to the accompanying drawings.

[0023] like Figures 1 to 5 As shown, the air duct system of the steamer and microwave oven in this embodiment includes components such as a cooking cavity 1, an air guide plate assembly 2, a hot air device 3, a three-way air valve 4, an air pipe 5, an air inlet connector 6, an exhaust connector 7 and an air guide pipe 8.

[0024] The cooking cavity 1 is provided with an air inlet 12 and an air outlet 11. To ensure smoother exhaust, the air inlet 12 and the air outlet 11 are arranged opposite to each other. In this embodiment, the air inlet 12 is arranged on the rear wall of the cooking cavity 1, and the air outlet 11 is arranged on the left wall of the cooking cavity 1. In addition, to prevent microwave leakage, the air inlet 12 and the air outlet 11 are both round holes with a diameter of 3 mm to 5 mm. The hot air device 3 is installed outside the cooking cavity 1 and is used to supply air to the air inlet 12. The steam in the cooking cavity 1 is discharged into the air guide plate assembly 2 through the air outlet 11, and is guided out to the outside of the integrated machine by the air guide plate assembly 2. Specifically, the air guide plate assembly 2 includes an air guide plate 21 and a crossflow fan 22. The exhaust connector 7 is arranged outside the cooking cavity 1 and covers the air outlet 11. The exhaust connector 7 is connected to the air inlet of the air guide plate 21 through the air guide pipe 8. The air outlet of the air guide plate 21 faces the air inlet of the crossflow fan 22, and the air outlet of the crossflow fan 22 faces the outside of the all-in-one machine. When the crossflow fan 22 is working, a negative pressure is formed at the air outlet 11, and the steam in the cooking cavity 1 gathers at the air outlet 11 and finally flows into the air guide plate 21. The crossflow fan 22 provides power to discharge the steam flowing into the air guide plate 21 from the exhaust port 312 of the rear plate 31.

[0025] In this embodiment, the hot air device 3 includes a rear plate 31, a fan assembly 32, a magnetron 33 and an air guide cover 34. The fan assembly 32 is arranged on the front side of the rear plate 31 and installed on the rear plate 31. The fan assembly 32, the magnetron 33 and the air guide cover 34 are arranged on the right side of the cooking cavity 1 and are arranged in sequence from back to front. A rear air inlet 311 is opened on the rear plate 31, and an air outlet 341 is opened on the air guide cover 34 to constitute an air outlet of the hot air device 3. The rear air inlet 311 is connected to the air outlet 341 through the fan assembly 32 and the magnetron 33. Specifically, the fan assembly 32 includes a fan bracket 321, a fan blade fan 322 and a fan blade 323. The fan bracket 321 is installed on the rear panel 31, the fan blade fan 322 is installed on the fan bracket 321, and the fan blade 323 is installed on the fan blade fan 322. The air inlet of the magnetron 33 faces the fan blade 323, and the air outlet of the magnetron 33 faces the air inlet of the wind guide cover 34.

[0026] The three-way air valve 4 of this embodiment has an air inlet 41, a first air outlet 42, and a second air outlet 43. The air outlet of the hot air device 3 is connected to the air inlet 41 of the three-way air valve 4 through the air pipe 5. The first air outlet 42 of the three-way air valve 4 is connected to the air inlet hole 12 of the cooking cavity 1 through the air inlet connector 6. The second air outlet 43 of the three-way air valve 4 is connected to the outside of the all-in-one machine. The first air outlet 42 and the second air outlet 43 of the three-way air valve 4 are opened and closed under the control of a controller (not shown in the figure).

[0027] The working principle of the air duct system is as follows:

[0028] When the microwave mode is working, the fan blade 322 and the magnetron 33 work at the same time. With the rotation of the fan blade 323, the external cold air enters the magnetron air inlet through the rear air inlet 311 of the rear plate 31, and the cold air enters the magnetron 33 to cool it and dissipate heat, and flows out from the magnetron air outlet to form hot air, and then the hot air enters the air guide cover 34, and then flows to the air inlet 41 of the three-way valve 4 through the air outlet 341 of the air guide cover 4. At this time, the first air outlet 42 of the three-way valve 4 is opened, and the second air outlet 43 of the three-way valve is closed. The hot air enters the cooking cavity 1 through the first air outlet 42 and the air inlet 12 of the three-way valve 4 in sequence. At the same time, the cross-flow fan 22 starts to work. Under the combined effect of the hot air in the cooking cavity 1 and the negative pressure at the air outlet 11, the water vapor generated by the microwave food will quickly and timely enter the air guide plate assembly 2, and finally be discharged to the external environment. It can be seen that the ventilation system recycles the hot air formed after the magnetron 33 dissipates heat. On the one hand, it exerts a driving force on the water vapor in the cooking cavity 1, prompting the steam in the cooking cavity 1 to be discharged more smoothly. On the other hand, it slows down the condensation of water vapor and reduces the condensed water in the cooking cavity 1 in the microwave mode.

[0029] When the steam mode is working, the fan 322 and the magnetron 33 do not work, and the steam is directly discharged through the air guide plate assembly 2, which is the same as the existing steam oven microwave oven. The first air outlet 42 and the second air outlet 43 of the three-way valve 4 are both closed, which can ensure that all the steam in the cooking cavity 1 flows into the air guide plate assembly 2 for discharge.

[0030] When the steam-microwave combination mode is working, the fan 322 and the magnetron 33 work simultaneously, the first air outlet 42 of the three-way air valve 4 is closed, and the second air outlet 43 is opened, and the hot air flowing out of the magnetron 33 is directly discharged through the second air outlet 43 without entering the cooking cavity 1. The steam in the cooking cavity 1 all flows into the air guide plate assembly 2 and is discharged.

[0031] The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the principle of the present invention, the present invention can be modified or improved in many ways. For example, the three-way air valve can be changed to a two-way one-way air valve, and the air outlet of the hot air device is connected to the air inlet of the two-way one-way air valve through the air pipe, and the air outlet of the two-way one-way air valve is connected to the air inlet of the cooking cavity through the air inlet joint. When the microwave mode or the steam-microwave combination mode is working, the two-way one-way air valve starts to work, and the cold air enters the cooking cavity after being converted into hot air by the magnetron, so that the steam in the cooking cavity is discharged more smoothly. When the steam mode is working, the two-way one-way air valve is closed, the fan blade fan and the magnetron do not work, and the steam is discharged directly through the air guide plate assembly, which is the same as the existing steam box microwave oven integrated machine. These are all considered to be within the protection scope of the present invention.

Claims

1. An air duct system of a steamer-microwave oven, comprising a cooking cavity (1) and an air guide plate assembly (2) mounted on the cooking cavity, wherein the cooking cavity (1) is provided with an air outlet (11) connected to an air inlet of the air guide plate assembly (2), and the air guide plate assembly (2) discharges steam in the cooking cavity (1) to the outside of the cooking cavity (1), characterized in that: The cooking cavity (1) is also provided with an air inlet (12). A hot air device (3) is installed outside the cooking cavity (1). The air outlet of the hot air device (3) is connected to the air inlet (12) via an air valve. The hot air device (3) comprises a rear plate (31), a fan assembly (32), a magnetron (33) and an air guide cover (34). The fan assembly (32) is arranged on the front side of the rear plate (31) and is installed on the rear plate (31). The rear plate (31) is provided with a rear air inlet (311), the air inlet (341) is provided with a rear air inlet (311) and the air inlet (341) is provided with a rear air inlet (311) to form an air outlet of the hot air device (3). The rear air inlet (311) is connected to the air outlet (341) through the fan assembly (32) and the magnetron (33). The fan assembly (32) includes a fan bracket (321), a fan blade (321), and a fan housing (322). The fan (322) and the fan blade (323), the fan bracket (321) is mounted on the rear plate (31), the fan blade fan (322) is mounted on the fan bracket (321), the fan blade (323) is mounted on the fan blade fan (322), the air inlet of the magnetron (33) faces the fan blade (323), the air outlet of the magnetron (33) faces the air inlet of the wind guide cover (34), and the air valve is a three-way air valve (4) The three-way air valve (4) has an air inlet (41), a first air outlet (42) and a second air outlet (43); the air outlet of the hot air device (3) is connected to the air inlet (41) of the three-way air valve (4) through an air pipe (5); the first air outlet (42) of the three-way air valve (4) is connected to the air inlet hole (12) of the cooking cavity (1) through an air inlet joint (6); and the second air outlet (43) of the three-way air valve (4) is connected to the outside of the all-in-one machine.

2. The air duct system of the integrated steamer and microwave oven according to claim 1, characterized in that: The air valve is a two-way one-way air valve, the air outlet of the hot air device (3) is connected to the air inlet of the two-way one-way air valve through an air pipe, and the air outlet of the two-way one-way air valve is connected to the air inlet of the cooking cavity through an air inlet joint.

3. The air duct system of the integrated steamer and microwave oven according to claim 1, characterized in that: It also includes an exhaust connector (7), which is arranged on the outside of the cooking cavity (1) and covers the exhaust hole (11), and the exhaust connector (7) is connected to the air inlet of the air guide plate assembly (2) through an air guide pipe (8).

4. The air duct system of the integrated steamer and microwave oven according to claim 3, characterized in that: The air inlet (12) and the air outlet (11) are arranged opposite to each other.

5. The air duct system of the integrated steamer and microwave oven according to claim 3, characterized in that: The diameters of the air inlet (12) and the air outlet (11) are 3 mm to 5 mm.

6. The air duct system of the integrated steamer and microwave oven according to claim 1, characterized in that: The air guide plate assembly (2) comprises an air guide plate (21) and a cross-flow fan (22); the air inlet of the air guide plate (21) is connected to the air outlet (11) of the cooking cavity (1); the air outlet of the air guide plate (21) faces the air inlet of the cross-flow fan (22); and the air outlet of the cross-flow fan (22) faces the outside of the all-in-one machine.

7. The air duct system of the integrated steamer and microwave oven according to any one of claims 1 to 6, characterized in that: The utility model also comprises a controller for controlling the opening and closing of the gas valve.

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