Steam generator and cooking apparatus

Abstract

The application relates to a steam generator and a cooking device, which comprise a steam flow channel, a water-steam separation device and a motor, the steam flow channel is used for water vapor to pass through, the water-steam separation device and the motor are located in the steam flow channel, the water-steam separation device is used for water vapor to be subjected to water-steam separation, and the motor is located downstream of the water-steam separation device along the water vapor flow direction; compared with the prior art, in the application, the motor is located downstream of the water-steam separation device in the steam flow channel along the water vapor flow direction, so that the water vapor passes through the water-steam separation device when flowing in the steam flow channel, the water content in the water vapor is greatly reduced after the water-steam separation device separates the water vapor, and then the water vapor flows to the motor, thereby preventing the motor from being corroded by the water in the water vapor, and guaranteeing the working performance and service life of the motor.

Description

Technical Field

[0001] This invention relates to the field of cooking equipment technology, specifically to a steam generator and cooking equipment. Background Technology

[0002] A steam generator, also called a steam heat source machine, is a mechanical device that uses the heat energy of fuel or other energy sources to heat water into hot water or steam. Steam generators are not only an important component of steam power units, but are also widely used in household appliances such as steam ovens and those with steam cooking functions.

[0003] When steam generators are used in household appliances such as steam ovens, they typically heat water in a tank using heating elements to produce steam, which then flows into the cooking cavity based on its properties. Because steam contains a large amount of moisture, and some steam generators have a built-in motor, the moisture in the steam can corrode the motor's components when it comes into contact with the motor during its flow, severely affecting the motor's performance. Summary of the Invention

[0004] The present invention aims to overcome the defects in the prior art and provide a steam generator and cooking equipment that can prevent the motor inside the steam generator from being corroded by the moisture in the steam, thereby ensuring the working performance and service life of the motor.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: a steam generator, comprising a steam flow channel, a water vapor separation device, and a motor, wherein the steam flow channel is used to allow water vapor to pass through, the water vapor separation device and the motor are located in the steam flow channel, the water vapor separation device is used to separate water vapor from water vapor along the direction of water vapor flow, and the motor is located downstream of the water vapor separation device.

[0006] As a preferred embodiment of the present invention, the water vapor separation device includes a water vapor separation drum for separating water vapor during rotation. The water vapor separation drum is provided with a plurality of vent holes, through which water vapor flows into the interior of the water vapor separation drum. The water vapor separation drum is also provided with an exhaust hole, through which water vapor inside the water vapor separation drum is discharged.

[0007] As a preferred embodiment of the present invention, the plurality of vent holes penetrate the sidewall of the water vapor separation drum radially, and the air outlet connects the interior and exterior of the water vapor separation drum axially. Along the direction of water vapor flow, the air outlet is located downstream of the plurality of vent holes.

[0008] As a preferred embodiment of the present invention, the diameter of the plurality of vent holes gradually decreases along the direction of water vapor flow.

[0009] As a preferred embodiment of the present invention, the water vapor separation device further includes an outer cylinder, the water vapor separation drum is disposed in the outer cylinder, a first flow channel is formed between the inner wall of the outer cylinder and the outer wall of the water vapor separation drum, and water vapor flows from the first flow channel to the vent.

[0010] As a preferred embodiment of the present invention, the outer cylinder is provided with an air inlet, through which water vapor flows to the first flow channel, and the radial width of the air inlet is smaller than the radial width of the first flow channel.

[0011] As a preferred embodiment of the present invention, the water vapor separation device includes a flow guide shroud, the radial width of which gradually increases along the direction of water vapor flow.

[0012] As a preferred embodiment of the present invention, the water vapor separation device includes a flow guide shroud, the radial width of which gradually increases along the direction of water vapor flow, and the water vapor separation roller is located downstream of the flow guide shroud.

[0013] As a preferred embodiment of the present invention, the steam generator further includes a pressurizing component disposed in the steam flow channel, the motor drives the pressurizing component and the water vapor separation drum to rotate, and the radial width of the pressurizing component decreases along the flow direction of the water vapor.

[0014] As a preferred embodiment of the present invention, the steam generator further includes a motor cover, in which the motor is disposed, and the motor cover isolates the motor from the water vapor in the steam flow channel.

[0015] The present invention also provides a cooking apparatus, including the steam generator described above.

[0016] Compared with the prior art, the beneficial effects of the present invention are: along the flow direction of water vapor, the motor is located downstream of the water vapor separation device in the steam flow channel, so that when the water vapor flows in the steam flow channel, it first passes through the water vapor separation device. After the water vapor separation device separates the water vapor, the water content in the water vapor is greatly reduced, and then it flows to the motor, thereby preventing the motor from being corroded by the moisture in the water vapor and ensuring the working performance and service life of the motor. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a steam generator and cooking equipment according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of a water vapor separation device for a steam generator and cooking equipment according to a first embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of a steam generator and cooking equipment according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the internal structure of the hidden outer cylinder of a steam generator and cooking equipment according to an embodiment of the present invention;

[0021] Reference numerals: 1. Water tank; 2. Heating component; 3. Flow guide shroud; 4. Second flow channel; 5. Conduit; 6. Water vapor separation drum; 7. Vent hole; 71. Air outlet; 72. Motor; 8. Outer cylinder; 9. Air inlet; 91. First flow channel; 10. Pressure booster; 11. Multi-stage impeller; 111. Turbine; 112. Rotating shaft; 12. Motor cover; 13. Detailed Implementation

[0022] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0023] like Figures 1-4 As shown, a steam generator includes a steam channel, a pressurizing component 11, and a motor 8. The water tank 1 of the steam generator has a cavity for loading water, and a heating component 2 is provided at the bottom of the cavity. The top of the cavity is open, and the steam channel is located at the opening at the top of the cavity. The heating component 2 heats the water in the cavity into steam. Due to the upward movement of hot air, the steam flows from the opening at the top of the cavity to the steam channel and then enters the cooking chamber through the steam channel.

[0024] Because water vapor contains a large amount of moisture, it affects the flowability of the water vapor and increases the steam delivery time. Therefore, in order to accelerate the flow of water vapor in the steam channel and ensure the working efficiency of the steam generator, a pressure booster 11 and a motor 8 are provided in the steam channel. The radial width of the pressure booster 11 decreases along the flow direction of the water vapor. The motor 8 is used to drive the pressure booster 11 and the water-vapor separation drum 7 to rotate. Since the radial width of the pressure booster 11 decreases along the flow direction of the water vapor, when the motor 8 drives the pressure booster 11 to rotate, the pressure generated upstream of the pressure booster 11 is greater, and the pressure generated downstream is smaller. Thus, the pressure difference between the upstream and downstream of the pressure booster 11 creates pressure boosting, accelerates the flow of water vapor in the steam channel, and improves the working efficiency of this steam generator.

[0025] Since water vapor contains a large amount of moisture, it will corrode the motor 8 in the steam flow channel, affecting the working performance and service life of the motor 8. Furthermore, when the steam generator heats the food in the cooking chamber with water vapor, the large amount of moisture in the water vapor will also affect the cooking effect of the food. Therefore, in this embodiment, a water vapor separation device is also provided in the steam flow channel. When water vapor passes through the water vapor separation device, the water vapor separation device separates the water vapor and reduces the water content in the water vapor.

[0026] Meanwhile, in this application, along the flow direction of water vapor, the motor 8 is located downstream of the water vapor separator in the steam channel, so that when the water vapor flows in the steam channel, it first passes through the water vapor separator. After the water vapor separator separates the water vapor, the water content in the water vapor is greatly reduced, and then it flows to the motor 8, thereby preventing the motor 8 from being corroded by the moisture in the water vapor and ensuring the working performance and service life of the motor 8.

[0027] In this embodiment, a motor cover 13 is also provided in the steam flow channel, and the motor 8 is disposed in the motor cover 13, which isolates the motor 8 from the water vapor in the steam flow channel. In this application, the water vapor in the steam flow channel is first separated by a water vapor separator to greatly reduce the moisture content of the water vapor before flowing to the motor 8. The motor cover 13 is also provided around the motor 8 to isolate the motor 8 from the water vapor in the steam flow channel, preventing the water vapor in the steam flow channel from contacting the motor 8, thereby providing better protection for the motor 8 and further ensuring the working performance and service life of the motor.

[0028] In practical applications, the steam flow channel includes a conduit 6 and a hood 3. The hood 3 is located between the water tank 1 and the conduit 6, connecting the water tank 1 and the conduit 6, so that the water vapor in the water tank 1 flows into the conduit 6 through the hood 3, and then enters the cooking cavity through the conduit 6.

[0029] In this application, one embodiment of the water vapor separation device is as follows: a guide hood 4 is installed inside the guide hood 3, and a second flow channel 5 is formed between the inner wall of the guide hood 3 and the outer wall of the guide hood 4. The motor 8 is installed in the conduit 6. Water vapor in the water tank 1 flows towards the guide hood 3 and is blocked by the guide hood 4 inside the guide hood 3. Due to the density difference between gas and liquid, the moisture in the water vapor adheres to the outer wall of the guide hood 4 to form condensate, which falls into the water tank 1 under the action of gravity. The gas in the water vapor bypasses the guide hood 4 and continues to flow to the conduit 6 through the second flow channel 5, thereby achieving water vapor separation. Since the motor 8 is located in the conduit 6, the water vapor entering the conduit 6 after separation by the guide hood 4 has a reduced water content, thereby preventing the motor 8 from being corroded by the moisture in the water vapor and ensuring the working performance and service life of the motor 8.

[0030] Along the direction of water vapor flow, the radial width of the guide shroud 4 gradually increases. On the one hand, this allows the water adhering to the outer wall of the guide shroud 4 to drip quickly down into the water tank 1. On the other hand, it reduces the obstruction to gas flow when the gas in the water vapor bypasses the guide shroud 4 and continues to flow in the steam channel, thereby ensuring the fluidity of the gas and improving the working efficiency of this steam generator.

[0031] In this application, another embodiment of the water vapor separation device is as follows: a water vapor separation drum 7 is installed in the conduit 6, and a motor 8 is installed in the conduit 6 along the direction of water vapor flow, with the motor 8 located downstream of the water vapor separation drum 7. The water vapor separation drum 7 is provided with an outlet 72 and multiple vent holes 71. When water vapor flows in the conduit 6, it flows into the interior of the water vapor separation drum 7 through the multiple vent holes 71. Then, the centrifugal force generated by the rotation of the water vapor separation drum 7 throws the water vapor that has entered the water vapor separation drum 7 away from the axial position of the water vapor separation drum 7.

[0032] Because of the difference in density between gas and liquid, the centrifugal force on the liquid is greater than that on the gas. Therefore, the water in the water vapor will be thrown towards the inner wall of the water vapor separation drum 7 and adhere to the inner wall of the water vapor separation drum 7. Under the action of gravity, it will drip to the bottom of the water vapor separation drum 7, while the gas in the water vapor will be discharged through the air outlet 72 on the water vapor separation drum 7, thereby achieving water vapor separation of water vapor and reducing the water content in the water vapor.

[0033] In this embodiment, multiple vent holes 71 penetrate the sidewall of the water vapor separation drum 7 radially, and an outlet hole 72 connects the interior and exterior of the water vapor separation drum 7 axially. Along the direction of water vapor flow, the outlet hole 72 is located downstream of the multiple vent holes 71. The multiple vent holes 71 are located on the sidewall of the water vapor separation drum 7 and penetrate it radially, allowing water vapor in the steam channel to enter the interior of the water vapor separation drum 7 radially through the multiple vent holes 71. The outlet hole 72 is located at the end of the water vapor separation drum 7 and penetrates it axially, connecting the interior and exterior of the water vapor separation drum 7. This allows the separated water vapor inside the water vapor separation drum 7 to be discharged axially from the outlet hole 72 and continue flowing in the steam channel.

[0034] The reason for placing the vent 71 on the side wall of the water vapor separation drum 7, allowing water vapor to flow radially into the interior of the water vapor separation drum 7, and the vent 72 at the end of the water vapor separation drum 7, allowing water vapor to exit axially from the interior of the water vapor separation drum 7, is to ensure the separation effect of the water vapor separation drum 7 on water vapor, thereby improving the water vapor separation efficiency. Along the flow direction of the water vapor, the vent 72 is located downstream of the multiple vents 71 on the water vapor separation drum 7, allowing the gas separated from the water vapor to exit more quickly through the vent 72, thus accelerating the flow efficiency of the water vapor and improving the working efficiency of the steam generator.

[0035] It is foreseeable that when the water vapor separation drum 7 is axially arranged in the steam flow channel, under the principle of hot air rising, the air outlet 72 is preferably located at the top of the water vapor separation drum 7, so that water vapor enters the interior of the water vapor separation drum 7 through multiple air vents 71 on the side wall of the water vapor separation drum 7. After being separated by the water vapor separation drum 7, the separated water adheres to the inner wall of the water vapor separation drum 7 to form condensate. The condensate flows downward along the inner wall of the water vapor separation drum 7 under its own gravity, while the separated gas flows upward and is discharged from the air outlet 72 at the top of the water vapor separation drum 7, further accelerating the flow efficiency of water vapor.

[0036] In this embodiment, the diameter of the multiple vent holes 71 gradually decreases along the direction of water vapor flow. In this application, the reason for providing multiple vent holes 71 on the water vapor separation drum 7 is to enable the water vapor in the steam flow channel to flow into the interior of the water vapor separation drum 7 more quickly. Therefore, it can be foreseen that multiple vent holes 71 are provided not only circumferentially on the side wall of the water vapor separation drum 7, but also axially.

[0037] In this application, water vapor flows radially from multiple vent holes 71 into the interior of the water vapor separation drum 7, and then flows axially from the interior of the water vapor separation drum 7 to the outlet hole 72. Therefore, it is possible that after the water vapor enters the interior of the water vapor separation drum 7 through the vent hole 71 closest to the outlet hole 72 in the axial direction, the separation time in the water vapor separation drum 7 is too short before it is discharged from the outlet hole 72, resulting in poor water vapor separation effect for this part of the water vapor.

[0038] Therefore, in this application, along the direction of water vapor flow, the diameter of the multiple vent holes 71 gradually decreases. That is, the vent holes 71 closer to the outlet 72 in the axial direction have smaller diameters, and the vent holes 71 farther away from the outlet 72 have larger diameters. This allows most of the water vapor to flow from the vent holes 71 farther away from the outlet 72 into the interior of the water vapor separation drum 7, thereby ensuring the water vapor separation effect and further protecting the motor.

[0039] It is foreseeable that during the process of separating water vapor by water vapor separation drum 7, some of the separated water will come into contact with the inner wall of water vapor separation drum 7 without vent holes 71 under the action of centrifugal force, forming condensate. Another part of the water will be thrown out of water vapor separation drum 7 through vent holes 71. The thrown-out water will continue to come into contact with the inner wall of the steam flow channel to form condensate, and will flow downward under its own gravity.

[0040] In this embodiment, the water vapor separation device further includes an outer cylinder 9, with a water vapor separation drum 7 disposed within the outer cylinder 9. A first flow channel 10 is formed between the inner wall of the outer cylinder 9 and the outer wall of the water vapor separation drum 7, through which water vapor flows to the vent 71. An outer cylinder 9 is provided outside the water vapor separation drum 7, forming the first flow channel 10 between the inner wall of the outer cylinder 9 and the outer wall of the water vapor separation drum 7. When water vapor flows in the conduit 6, guided by the outer cylinder 9, it flows through the first flow channel 10 to the vent 71, and then from the vent 71 into the interior of the water vapor separation drum 7, thereby allowing water vapor to flow into the interior of the water vapor separation drum 7 more quickly and improving the working efficiency of the steam generator.

[0041] In this embodiment, the outer cylinder 9 is provided with an air inlet 91. Water vapor flows from the air inlet 91 to the first flow channel 10. The radial width of the air inlet 91 is smaller than the radial width of the first flow channel 10. When the water vapor flows in the steam flow channel, it first flows through the air inlet 91 of the outer cylinder 9 to the first flow channel 10, and then flows from the first flow channel 10 to the vent 71. In this application, the radial width of the air inlet 91 is smaller than the radial width of the first flow channel 10. The pressure booster 11 can be provided at the air inlet 91, and the radial width of the air inlet 91 is slightly larger than the radial width of the pressure booster 11. Thus, under the combined action of the pressure booster 11 and the air inlet 91, water vapor is allowed to flow through the air inlet 91 to the first flow channel 10 as much as possible, accelerating the flow of water vapor.

[0042] In this application, the first and second embodiments of the water vapor separation device can be used individually or in combination. When the first and second embodiments of the water vapor separation device are used in combination, the specific implementation is as follows: the guide hood 4 is located in the guide hood 3, and a second flow channel 5 is formed between the inner wall of the guide hood 3 and the outer wall of the guide hood 4. The water vapor in the water tank 1 first enters the guide hood 3, and the guide hood 4 performs the first water vapor separation. The separated water vapor flows to the conduit 6 through the second flow channel 5.

[0043] The water vapor separation drum 7 and outer cylinder 9 are installed in the conduit 6. Water vapor flowing into the conduit 6 enters the first flow channel 10 through the air inlet 91, and then enters the interior of the water vapor separation drum 7 through the vent 71. The water vapor separation drum 7 performs a second water vapor separation. The separated water vapor continues to flow in the conduit 6 through the air outlet 72, and then flows to the cooking chamber. This double water vapor separation improves the water vapor separation effect of the steam generator, thereby further protecting the motor.

[0044] In this application, it is foreseeable that the water vapor separation drum 7 is more effective than the guide shroud 4 in separating water vapor. At the same time, the water vapor moisture content in the upstream water vapor is higher than that in the downstream water vapor. Therefore, when the water vapor is separated twice by combining the guide shroud 4 and the water vapor separation drum 7, the water vapor separation drum 7 is located downstream of the guide shroud 4 along the water vapor flow direction.

[0045] On the one hand, the water vapor with a high water content in the upstream is separated by the guide hood 4, which has a poor water vapor separation effect. On the other hand, the water vapor with a low water content in the downstream is separated by the water vapor separation drum 7, which has a better water vapor separation effect. This makes the water vapor separation function of the water vapor separation device easier to achieve.

[0046] On the other hand, the steam first passes through the guide shroud 4, which separates some of the moisture from the steam. Then, the steam passes through the water vapor separation drum 7, which further separates the remaining moisture from the steam, thus ensuring the water vapor separation effect of this steam generator. However, if the guide shroud 4 is located downstream of the water vapor separation drum 7, after the steam has passed through the water vapor separation drum 7, the guide shroud 4 cannot further separate the remaining moisture from the steam, thus failing to achieve the expected water vapor separation effect.

[0047] In this application, the pressurizing component 11 can be a multi-stage impeller 111 installed in the duct 6. The diameter of the multi-stage impeller 111 decreases along the flow direction of the water vapor. When the motor 8 drives the multi-stage impeller 111 to rotate simultaneously, the pressure generated upstream of the multi-stage impeller 111 is greater and the pressure generated downstream is smaller. Thus, the pressure difference between the upstream and downstream of the multi-stage impeller 111 forms a pressurization, which accelerates the flow of water vapor in the steam channel.

[0048] In this application, the pressurizing component 11 has another embodiment: a turbine 112 is provided in the duct 6, and the radial width of the turbine decreases along the direction of water vapor flow. When the motor 8 drives the turbine 112 to rotate, the pressure generated upstream of the turbine 112 is high and the pressure generated downstream is low, thereby forming a pressurization through the pressure difference between the upstream and downstream of the turbine 112, and accelerating the flow of water vapor in the steam channel.

[0049] In this application, the two embodiments of the pressurizing component 11 can be used individually or in combination. When the two embodiments of the pressurizing component 11 are used in combination, the specific implementation can be as follows: the multi-stage impeller 111, the water vapor separation drum 7, the turbine 112, and the motor 8 are arranged sequentially in the duct 6 along the direction of water vapor flow, and the motor 8, the turbine 112, the water vapor separation drum 7, and the multi-stage impeller 111 are located on the same vertical line. The motor 8 is simultaneously connected to the turbine 112, the water vapor separation drum 7, and the multi-stage impeller 111 through the rotating shaft 12, so that when the motor 8 rotates, the rotating shaft 12 simultaneously drives the turbine 112, the water vapor separation drum 7, and the multi-stage impeller 111 to rotate.

[0050] The reason for synchronously driving the turbine 112, the water vapor separation drum 7, and the multi-stage impeller 111 by the motor 8 is twofold. First, synchronous starting of the turbine 112, the water vapor separation drum 7, and the multi-stage impeller 111 ensures that steam flows into the cooking chamber after passing through the water vapor separation drum 7. If the turbine 112, the water vapor separation drum 7, and the multi-stage impeller 111 start asynchronously, they may start before the water vapor separation drum 7, causing steam to flow quickly through the steam channel into the cooking chamber without undergoing water vapor separation in the water vapor separation drum 7, affecting the taste of the food. Second, it reduces the number of motors required to drive the turbine 112, the water vapor separation drum 7, and the multi-stage impeller 111 separately. This not only reduces the production cost of the steam generator but also reduces its size, improving the space utilization of the cooking equipment.

[0051] The multi-stage impeller 111 is located at the air inlet 91 of the outer cylinder 9. When the water vapor flows from the guide shroud 3 to the guide tube 6, the multi-stage impeller 111 initially pressurizes the water vapor, accelerates the flow of the water vapor, and allows the water vapor to quickly enter the water vapor separation drum 7 through the air inlet 91. The turbine 112 is located downstream of the air outlet 72 of the water vapor separation drum 7. After the water vapor passes through the water vapor separation drum 7, the turbine 112 accelerates the water vapor and sprays it out, allowing the water vapor in the water vapor separation drum 7 to be quickly discharged from the air outlet 72, thereby accelerating the flow of water vapor in the steam channel and improving the working efficiency of this steam generator.

[0052] This embodiment also provides a cooking device, including the steam generator described above.

[0053] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0054] Although this document frequently uses reference numerals from the accompanying drawings, such as water tank 1, heating assembly 2, flow guide shroud 3, flow deflector 4, second flow channel 5, conduit 6, water-vapor separation drum 7, vent 71, air outlet 72, motor 8, outer cylinder 9, air inlet 91, first flow channel 10, booster 11, multi-stage impeller 111, turbine 112, shaft 12, and motor cover 13, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A steam generator, characterized in that: It includes a steam flow channel, a water vapor separation device and a motor (8). The steam flow channel is used to allow water vapor to pass through. The water vapor separation device and the motor (8) are located in the steam flow channel. The water vapor separation device is used to separate water vapor from water vapor. Along the direction of water vapor flow, the motor (8) is located downstream of the water vapor separation device. The water vapor separation device includes a water vapor separation drum (7) for separating water vapor during rotation. The water vapor separation drum (7) is provided with a plurality of vent holes (71). Water vapor flows from the vent holes (71) into the interior of the water vapor separation drum (7). The water vapor separation drum (7) is also provided with an exhaust hole (72) to discharge the water vapor inside the water vapor separation drum (7).

2. A steam generator according to claim 1, characterized in that: Multiple ventilation holes (71) penetrate the sidewall of the water vapor separator (7) radially, and the air outlet (72) connects the interior and exterior of the water vapor separator (7) axially. Along the direction of water vapor flow, the air outlet (72) is located downstream of the multiple ventilation holes (71).

3. A steam generator according to claim 2, characterized in that: Along the direction of water vapor flow, the diameter of the plurality of vent holes (71) gradually decreases.

4. A steam generator according to claim 1, characterized in that: The water vapor separation device also includes an outer cylinder (9), and the water vapor separation drum (7) is disposed in the outer cylinder (9). A first flow channel (10) is formed between the inner wall of the outer cylinder (9) and the outer wall of the water vapor separation drum (7), and water vapor flows from the first flow channel (10) to the vent (71).

5. A steam generator according to claim 4, characterized in that: The outer cylinder (9) is provided with an air inlet (91), and water vapor flows from the air inlet (91) to the first flow channel (10). The radial width of the air inlet (91) is smaller than the radial width of the first flow channel (10).

6. A steam generator according to claim 1, characterized in that: The water vapor separation device includes a flow guide shroud (4), and the radial width of the flow guide shroud (4) gradually increases along the direction of water vapor flow.

7. A steam generator according to claim 1, characterized in that: The water vapor separation device includes a guide shroud (4), the radial width of which gradually increases along the direction of water vapor flow, and the water vapor separation roller (7) is located downstream of the guide shroud (4).

8. A steam generator according to claim 1, characterized in that: The steam generator also includes a pressure booster (11) disposed in the steam flow channel. The motor (8) drives the pressure booster (11) and the water vapor separation drum (7) to rotate. The radial width of the pressure booster (11) decreases along the direction of water vapor flow.

9. A steam generator according to claim 1, characterized in that: The steam generator also includes a motor housing (13), in which the motor (8) is housed, and the motor housing (13) isolates the motor (8) from the water vapor in the steam flow channel.

10. A cooking device, characterized in that, Includes the steam generator as described in any one of claims 1-9.

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