A steam cooking appliance

Abstract

The present application discloses a steam cooking appliance, which includes a pot body having a cooking cavity, a steam generator, and a steam diversion member communicated with the steam generator. The steam diversion member is provided with a steam outlet, and the steam outlet is located below the liquid level of the liquid in the cooking cavity. The steam cooking appliance further includes a gas supply device for delivering gas into the cooking cavity. The steam generated by the steam generator is mixed with the gas delivered by the gas supply device to form a mixed fluid, and the mixed fluid flows into the cooking cavity through the steam outlet. The gas reduces the heat transfer coefficient of the bubbles, so that the condensation rate of the steam in the bubbles is reduced. Moreover, as the steam condenses, the heat transfer coefficient of the bubbles continuously decreases, thereby reducing the speed of the reduction of the bubble volume. The squeezing force of the liquid around the bubbles on the bubbles is reduced, and the impact speed of the liquid is reduced. Therefore, the noise generated due to the mutual impact of the liquid around the bubbles is reduced.

Description

Technical Field

[0001] This application belongs to the technical field of kitchen appliances, and particularly relates to a steam cooking appliance. Background Art

[0002] Existing steam cooking appliances usually deliver high-temperature steam into the pot body through a steam outlet to heat and cook food. Usually, the steam outlet is arranged below the liquid level of the food in the pot body to improve the contact effect between the steam and the food, thereby improving the heating effect.

[0003] However, during the cooking process, for example, in the early stage of cooking, the temperature of the liquid in the pot body is relatively low (the initial temperature of the cooking liquid is close to room temperature of 23°C). When high-temperature steam enters the liquid, bubbles are formed in the liquid. Under the action of the pressure difference inside and outside the bubbles, the liquid around the bubbles will exert a squeezing force on the bubbles. The liquid around the bubbles continuously squeezes into the bubbles and collides, so a violent liquid impact sound will be emitted, generating a relatively large noise and affecting the user experience.

[0004] With the squeezing of the liquid and the heat transfer between the bubbles and the liquid, the water vapor in the bubbles gradually liquefies into liquid water, and then the volume of the bubbles rapidly decreases until they collapse. However, as the volume of the bubbles decreases, the pressure difference inside and outside the bubbles becomes larger and larger, and the squeezing and collision of the liquid on the bubbles become more and more violent, resulting in a gradually increasing noise. When the volume of the bubbles approaches 0, the collision of the liquid accompanied by the collapse of the bubbles generates a particularly violent and obvious noise, and the user can clearly hear the collision sound coming from inside the cooking appliance, thereby resulting in a poor user experience.

[0005] Therefore, how to reduce the noise generated by the steam cooking appliance during the cooking process has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0006] This application provides a steam cooking appliance to solve the problem of generating relatively large noise during the cooking process of the steam cooking appliance.

[0007] The technical solution adopted in this application is as follows:

[0008] A steam cooking appliance includes a pot body with a cooking cavity and a steam generator, and a steam outlet located below the liquid level of the liquid in the cooking cavity; the steam cooking appliance further includes a gas supply device for delivering gas into the cooking cavity, and the steam generated by the steam generator is mixed with the gas delivered by the gas supply device to form a mixed fluid, and the mixed fluid flows into the cooking cavity through the steam outlet.

[0009] The steam cooking appliance is provided with a fluid passage communicating the steam generator and the steam outlet. The air supply device includes a blowing member, an air outlet of the blowing member is communicated with the fluid passage, the blowing member is configured to pump air into the fluid passage, and the blowing member is disposed on the pot body; alternatively, the steam cooking appliance further includes a pot lid covering the pot body, and the blowing member is disposed on the pot lid.

[0010] The volume of the gas accounts for 0.5%-5% of the volume of the mixed fluid.

[0011] It further includes a steam guiding member extending into the cooking cavity from top to bottom. The steam guiding member is communicated with the steam generator and is provided with the steam outlet.

[0012] It further includes a steam nozzle for delivering steam to the cooking cavity from bottom to top. The steam nozzle is communicated with the steam generator and is provided with the steam outlet.

[0013] The steam cooking appliance further includes an air flow passage communicating the fluid passage and the steam outlet, and the gas enters the fluid passage through the air flow passage.

[0014] The air flow passage is further provided with a heating device configured to heat the gas in the air flow passage to reduce the temperature difference between the gas and the steam.

[0015] The steam cooking appliance further includes a control unit electrically connected to the air supply device and the steam generator respectively. The control unit controls the air supply device and the steam generator to start or stop synchronously; alternatively, the control unit controls the air supply device and the steam generator to start or stop at intervals.

[0016] The steam cooking appliance further includes a temperature measuring device electrically connected to the control unit. The temperature measuring device is configured to detect the temperature of the liquid in the cooking cavity, and the control unit is configured to control the start or stop of the air supply device according to the temperature of the liquid in the cooking cavity.

[0017] The steam cooking appliance further includes an inner pot and a sound insulation member. The inner pot encloses the cooking cavity, and the sound insulation member is disposed outside the inner pot.

[0018] Due to the adoption of the above technical solutions, the beneficial effects obtained by this application are:

[0019] 1. The present application conveys gas through the gas supply device, and the gas is mixed with the steam generated by the steam generator to form the mixed fluid, which flows together into the cooking cavity, so that the steam input into the cooking cavity is doped with gas. Then, when the mixed fluid contacts the liquid in the cooking cavity, the bubbles formed contain the mixed fluid. Since the gas contains non-condensable gas, which does not condense as the temperature decreases, the heat transfer coefficient of the bubbles is reduced, the condensation rate of the steam in the bubbles is decreased, and as the steam condenses, the proportion of non-condensable gas in the gas becomes higher and higher, and the heat transfer coefficient of the bubbles continues to decrease. As a result, the speed of the bubble volume shrinking is reduced, the squeezing force of the liquid around the bubbles on the bubbles is decreased, and the impact speed of the liquid is reduced. Therefore, the noise generated by the mutual impact of the liquid around the bubbles is reduced.

[0020] On the other hand, the steam in the bubbles gradually condenses into liquid water, and the volume of the bubbles also gradually decreases. Since there is the gas inside and the non-condensable gas in the gas does not condense into liquid water, when all the steam in the bubbles condenses into liquid water and only non-condensable gas remains in the bubbles, this part of non-condensable gas will prevent the volume of the bubbles from continuing to decrease, so that the volume of the bubbles will not approach 0. Then, the movement of the liquid around the bubbles when the bubbles are on the verge of collapsing is slowed down, the impact speed and impact force of the liquid are reduced, and thus the noise generated by the liquid impact is reduced, and the popping sound generated by the bubble collapse is also reduced, thereby greatly reducing the noise generated inside the pot body and improving the user experience.

[0021] 2. As a preferred embodiment of the present application, the steam cooking appliance is provided with a fluid passage connecting the steam generator and the steam outlet. The gas supply device includes a blowing member, and the air outlet of the blowing member is communicated with the fluid passage. The blowing member is used for pumping air into the fluid passage. By pumping air through the blowing member, since air is a non-condensable gas, it does not condense as the temperature decreases but always remains in a gaseous state. Therefore, it can effectively slow down the speed of the volume reduction of the bubbles formed by the mixed fluid in the liquid, achieving the effect of reducing noise. And compared with other non-condensable gases, air is easily obtained, and the price of the blowing member for producing air is relatively low, reducing the production cost. Moreover, introducing air into the cooking cavity will not affect the cooking effect and taste of the food, ensuring the cooking effect of the food.

[0022] 3. As a preferred embodiment of the present application, the volume of the gas accounts for 0.5%-5% of the volume of the mixed fluid. When the volume of the gas accounts for 0.5%-5% of the volume of the mixed fluid, it can ensure the heating efficiency of the steam cooking appliance while effectively preventing the reduction rate of the bubble volume, ensuring the amount of steam introduced, so that the steam has a better heating effect on the food in the cooking cavity, and avoiding the reduction of the amount of steam introduced into the cooking cavity due to excessive gas introduction, and the temperature of the steam decreases, affecting the heating efficiency.

[0023] 4. As a preferred embodiment of the present application, the steam cooking appliance further includes a control unit, which is electrically connected to the gas supply device and the steam generator respectively, and the control unit controls the gas supply device and the steam generator to start or stop at intervals. In the early stage of cooking, the temperature of the liquid in the cooking cavity is relatively low, the temperature difference between the steam and the liquid is large, the condensation speed is fast, and the speed of bubble collapse generated when the steam is introduced into the liquid is also fast. At this time, the generated noise is large. Therefore, the gas supply device is started in the early stage of cooking to relieve the noise generated in the cooking cavity in the early stage of cooking. When the temperature of the liquid inside the cooking cavity rises to be close to the temperature of the steam, at this time the condensation speed of the steam decreases, and the sound of liquid collision and bubble collapse is also small. At this time, the control unit stops the gas supply device from working, reducing the overall power consumption of the machine and saving costs. Description of the Drawings

[0024] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments and descriptions thereof are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0025] Figure 1 It is a cross-sectional view of the steam cooking appliance under an embodiment of the present application, where the arrow indicates the flow direction of the fluid;

[0026] Figure 2 It is a cross-sectional view of the steam cooking appliance under another embodiment of the present application;

[0027] Figure 3 It is a cross-sectional view of the steam cooking appliance under yet another embodiment of the present application;

[0028] Figure 4 It is a curve graph of the change relationship between the bubble radius and the sound pressure level.

[0029] Among them:

[0030] 1 Pot body; 11 Cooking cavity; 12 Pot placement area; 13 Machine head;

[0031] 2 Steam generator;

[0032] 3 Steam drainage member; 31 Steam outlet;

[0033] 4 Air supply device; 41 Air blowing member; 42 Air flow channel;

[0034] 5 Fluid channel; 51 First fluid channel; 52 Second fluid channel;

[0035] 7 Inner container;

[0036] 8 Pot lid. Detailed implementation mode

[0037] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail by way of examples in conjunction with the accompanying drawings of the specification.

[0038] In the following description, many specific details are set forth in order to fully understand the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0039] In addition, in the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0040] In the present application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description referring to terms such as "embodiment", "example", "an embodiment", "example" or "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0042] As Figures 1-4 shown, a steam cooking appliance includes a pot body 1 having a cooking cavity 11, a steam generator 2, and a steam diversion member 3 communicating with the steam generator 2. The steam diversion member 3 extends into the cooking cavity from top to bottom, and the steam diversion member 3 is provided with a steam outlet 31, and the steam outlet 31 is located below the liquid level of the liquid in the cooking cavity 11; the steam cooking appliance further includes a gas supply device 4, and the gas supply device 4 is used to supply gas into the cooking cavity 11. The steam generated by the steam generator 2 is mixed with the gas supplied by the gas supply device 4 to form a mixed fluid, and the mixed fluid flows into the cooking cavity 11 through the steam outlet 31.

[0043] It should be noted that this application does not make specific limitations on the structure of the steam cooking appliance. In a specific embodiment, as Figure 1 、 Figure 3 shown, the steam cooking appliance has an inner pot 7, and the inner pot 7 is placed in the cooking cavity 11. The steam cooking appliance further includes a pot lid 8 covering the pot body 1 to close the cooking cavity 11, and the steam diversion member 3 is disposed on the pot lid 8. In another specific embodiment, as Figure 2 shown, the pot body 1 is provided with a pot placing and removing area 12. The steam cooking appliance has an inner pot 7, and the inner pot 7 is placed in the pot placing and removing area 12. The pot body 1 further includes a machine head 13 located above the pot placing and removing area 12, and the steam diversion member 3 is disposed on the machine head 13. Of course, the steam cooking appliance can also have other structures.

[0044] The steam cooking appliance can also be an electric steamer with bottom air intake. In a specific embodiment, the steam cooking appliance has a steam nozzle that conveys steam from bottom to top to the cooking cavity. The steam nozzle is in communication with the steam generator and is provided with the steam outlet. Of course, the steam conveyance method can also be at other positions of the cooking cavity 11, such as on the side wall, etc. The present application does not limit the structural form of how to convey steam into the cooking cavity.

[0045] In addition, the gas conveyed by the gas supply device 4 should be at least partially non-condensable gas. Here, non-condensable gas generally refers to a gas with physical properties that are less likely to condense and liquefy relative to high-temperature water vapor, such as air, oxygen, nitrogen, etc., or a gas that is not easily soluble in water and does not easily react with water chemically. In actual use, the gas conveyed by the gas supply device 4 should also be a gas that does not affect the cooking effect, taste, etc. of the food.

[0046] In the present application, the gas supply device 4 conveys gas, and the gas is mixed with the steam generated by the steam generator 2 to form the mixed fluid, which flows together into the cooking cavity 11, so that the steam input into the cooking cavity 11 is doped with gas. Furthermore, the bubbles formed after the mixed fluid contacts the liquid in the cooking cavity 11 enclose the mixed fluid. Since the gas contains non-condensable gas, it does not condense as the temperature decreases, so the heat transfer coefficient of the bubbles is reduced, and the condensation speed of the steam in the bubbles is decreased. As the steam condenses, the proportion of non-condensable gas in the gas becomes higher and higher, and the heat transfer coefficient of the bubbles continues to decrease. Furthermore, the speed of the bubble volume shrinking is reduced, the squeezing force of the liquid around the bubble on the bubble is decreased, and the impact speed of the liquid is reduced. Therefore, the noise generated by the mutual impact of the liquid around the bubbles is reduced.

[0047] Figure 4 The relationship change curve between the radius of a single bubble and the sound pressure level is shown, where the abscissa is the radius of the bubble (mm) and the ordinate is the sound pressure level (db). By Figure 4 It can be seen that as the radius of the bubble gradually decreases, the noise generated by the impact of the surrounding liquid also gradually increases. When the radius of the bubble is less than 0.1 mm, that is, when the bubble is about to collapse and disappear, the noise generated by the impact of the liquid increases sharply.

[0048] In the steam cooking appliance of the present application, since there is gas inside it and the non-condensable gas in the gas will not condense into liquid, when all the steam in the bubble condenses into liquid water and only non-condensable gas remains in the bubble, this part of non-condensable gas will prevent the volume of the bubble from continuing to decrease, so that the volume of the bubble will not approach 0, thereby slowing down the movement of the surrounding liquid when the bubble is on the verge of collapse, reducing the impact speed and impact force of the liquid, further reducing the noise generated by the liquid impact, and also reducing the popping sound generated by the bubble collapse, thus greatly reducing the noise generated inside the pot body 1 and improving the user experience.

[0049] In addition, at the initial stage of cooking, the temperature of the liquid in the cooking cavity 11 is relatively low, the temperature difference between the steam and the liquid is large, the condensation speed is fast, and the speed of the bubble collapse generated by the steam passing into the liquid is also fast. At this time, the generated noise is large. In the prior art, in order to reduce the noise at the initial stage of cooking, some steam cooking appliances usually control the steam generator to operate at a relatively low power at the initial stage of cooking to reduce the condensation effect of the steam. When the temperature of the liquid in the pot rises, high-power cooking is adopted. Therefore, the amount of steam input into the cooking cavity 11 at the initial stage of cooking is small, and the heating efficiency is low. However, in the present application, by mixing gas into the steam, the noise of the liquid impact and bubble collapse in the cooking cavity 11 is reduced. Therefore, the steam cooking appliance of the present application reduces the limitation of power on the cooking program design, allows the steam cooking appliance to perform high-power steam heating when the temperature in the cooking cavity 11 is relatively low at the initial stage of cooking, simplifies the overall operation program, and improves the heating efficiency.

[0050] As a preferred embodiment of the present application, as Figure 1 、 Figure 3 shown, the steam cooking appliance is provided with a fluid passage 5 connecting the steam generator 2 and the steam outlet 31. The air supply device 4 includes a blowing member 41. The air outlet of the blowing member 41 is communicated with the fluid passage 5. The blowing member 41 is used for pumping air into the fluid passage 5.

[0051] By pumping air through the blowing member 41, since air is a non-condensable gas, it can effectively slow down the speed of the volume reduction of the bubble formed by the mixed fluid in the liquid, achieving the effect of reducing noise. And compared with other non-condensable gases, air is easily obtained, the price of the blowing member 41 for producing air is low, reducing the production cost, and introducing air into the cooking cavity 11 will not affect the cooking effect, taste, etc. of the food, ensuring the cooking effect of the food. The blowing member 41 can be an air pump, a blower, etc., and no specific limitation is made here.

[0052] Of course, the gas supply device 4 can also be of other types to deliver other non-condensable gases into the fluid passage 5. For example, the gas supply device 4 can also be an oxygen generator for delivering oxygen into the fluid passage 5.

[0053] In this embodiment, the installation position of the air blowing member 41 is not specifically limited. In a specific embodiment, as Figure 3 shown, the steam cooking appliance further includes a pot lid 9 covering the pot body 1, and the air blowing member 41 is disposed on the pot lid 9. In another specific embodiment, as Figure 1 shown, the air blowing member 41 is disposed on the pot body 1. Compared with the way of being disposed on the pot lid, the weight of the pot lid in this embodiment is reduced, making it easier for the user to pick up the pot lid, and enabling the air pumped by the air blowing member 41 to be mixed with the steam earlier, so that the two are fully mixed, avoiding the stratification of air and steam and affecting the noise reduction effect.

[0054] As a preferred embodiment of the present application, the volume of the gas accounts for 0.5%-5% of the volume of the mixed fluid.

[0055] When the volume of the gas accounts for 0.5%-5% of the volume of the mixed fluid, on the basis of ensuring that the gas effectively prevents the reduction rate of the bubble volume, the heating efficiency of the steam cooking appliance can also be ensured, the amount of steam introduced can be ensured, and then the steam can have a better heating effect on the food in the cooking cavity 11, avoiding too much gas being introduced and resulting in a reduction in the amount of steam introduced into the cooking cavity 11 and a decrease in the temperature of the steam, which affects the heating efficiency.

[0056] It is experimentally obtained that when the volume of the input gas accounts for 0.5% of the volume of the mixed fluid, the heat transfer coefficient on the surface of the bubbles formed by the mixed fluid in the liquid in the cooking cavity 11 is reduced by 50%, the heat transfer between the bubbles and the liquid is slower, the condensation rate of the steam in the bubbles is lower, the shrinking rate of the bubble volume is slower, the squeezing force of the liquid around the bubbles on the bubbles is smaller, the impact speed of the liquid is lower, and the noise generated by the liquid collision is smaller.

[0057] When the volume of the input gas accounts for 5% of the volume of the mixed fluid, the heat transfer coefficient on the surface of the bubbles formed by the mixed fluid in the liquid in the cooking cavity 11 is reduced by 90%, the heat transfer between the bubbles and the liquid is slow, the condensation rate of the steam in the bubbles is greatly reduced, the shrinking rate of the bubble volume is slow, the squeezing force of the liquid around the bubbles on the bubbles is small, the impact speed of the liquid is low, and the liquid collision generates a weak sound that is hardly detectable by the human ear.

[0058] Moreover, by introducing the gas with different volume fractions, after the bubbles disappear, 0.5%-5% of the gas still remains. This part of the gas prevents the volume of the bubbles from continuing to decrease, thereby avoiding violent collisions of the liquid. Preferably, after the steam condenses and disappears, the radius of the sphere formed by the gas is greater than 1 mm, that is, the gas prevents the radius of the bubbles from decreasing to less than 1 mm to avoid an increase in noise.

[0059] Taking the volume of the input gas accounting for 2% of the volume of the mixed fluid as an example. For a bubble with a diameter of 3 mm, its volume is 0.0141372 mm 3 , when all the steam inside it condenses into liquid water, only the gas remains in the bubble, and the volume of the gas is 0.000282744 mm 3 , assuming that these gases aggregate into a sphere, the radius of the sphere is about 0.41 mm. The gas prevents the volume of the bubbles from continuing to decrease, so that the volume of the bubbles does not approach 0, thereby slowing down the movement of the surrounding liquid when the bubbles are on the verge of collapsing, reducing the impact speed and impact force of the liquid, and thus reducing the noise generated by the liquid impact.

[0060] As a preferred embodiment of this embodiment, as Figure 1 shown, the steam cooking appliance further includes a fluid channel 5 and an air flow channel 42. The air flow channel 42 communicates the fluid channel 5 and the steam outlet 31, and the gas enters the fluid channel 5 through the air flow channel 42. The mixed fluid flows out through the fluid channel 5 and the steam outlet 31 and enters the liquid surface for cooking. The steam cooking appliance further includes a pot lid 8 covering the pot body 1. A second fluid channel 52 is provided inside the pot lid 8. The second fluid channel 52 communicates the first fluid channel 51 and the steam outlet 31, and the mixed fluid flows out from the steam outlet 31 through the first fluid channel 51 and the second fluid channel 52.

[0061] The gas and the steam are mixed in the first fluid channel 51 and flow through the second fluid channel 52 together and flow out from the steam outlet 31, extending the flow path of the mixed fluid, increasing the mixing time of the steam and the gas, enabling the two to be fully mixed, ensuring that the mixed fluid enters the cooking cavity 11 in a state where the gas and the steam are completely mixed, so as to ensure that the gas and the steam are evenly mixed in the bubbles formed by the contact of the mixed fluid with the liquid, and thus ensuring the noise reduction effect.

[0062] Furthermore, a heating device is further provided in the air flow channel 42. The heating device is used to heat the gas in the air flow channel 42 to reduce the temperature difference between the gas and the steam.

[0063] The heating device heats the gas in the gas flow channel 42 to reduce the temperature difference between the gas and the steam, promote the mixing of the steam and the gas, and also avoid condensation after the steam contacts the gas, ensuring the amount of steam and the temperature of the steam introduced into the cooking cavity 11 and ensuring the heating efficiency.

[0064] It should be noted that the present application does not specifically limit the operation modes of the gas supply device 4 and the steam generator 2, and they can be one of the following embodiments:

[0065] Embodiment 1: In this embodiment, the steam cooking appliance further includes a control unit, the control unit is electrically connected to the gas supply device 4 and the steam generator 2 respectively, and the control unit controls the gas supply device 4 and the steam generator 2 to start or stop synchronously.

[0066] When the cooking program starts, the steam generator 2 and the gas supply device 4 start synchronously, so that during the entire cooking process, the mixed fluid always flows into the cooking cavity 11, and thus the noise in the cooking cavity 11 during the entire cooking stage is at a relatively low decibel, improving the user experience. When the cooking ends, the steam generator 2 and the gas supply device 4 also stop synchronously.

[0067] Embodiment 2: In this embodiment, the steam cooking appliance further includes a control unit, the control unit is electrically connected to the gas supply device 4 and the steam generator 2 respectively, and the control unit controls the gas supply device 4 and the steam generator 2 to start or stop at intervals.

[0068] In a specific embodiment, the steam generator 2 and the gas supply device 4 start synchronously, and after the gas supply device 4 works for a certain period of time, it stops, while the steam generator 2 remains in the working state until the cooking ends.

[0069] In the initial stage of cooking, the temperature of the liquid in the cooking cavity 11 is relatively low, the temperature difference between the steam and the liquid is large, the condensation speed is fast, and the speed of the bubbles generated when the steam is introduced into the liquid collapsing is also fast. At this time, the generated noise is large. Therefore, the gas supply device is started in the early stage of cooking to relieve the noise generated in the cooking cavity 11 in the early stage of cooking. When the temperature of the liquid inside the cooking cavity 11 rises to be close to the temperature of the steam, at this time the condensation speed of the steam decreases, and the sound of the liquid collision and the bubble collapse is also small. At this time, the gas supply device 4 is controlled to stop working, reducing the overall power consumption of the machine and saving costs.

[0070] Preferably, the steam cooking appliance further includes a temperature measuring device electrically connected to the control unit. The temperature measuring device is configured to detect the temperature of the liquid in the cooking chamber 11, and the control unit is configured to control the start or stop of the gas supply device 4 according to the temperature of the liquid in the cooking chamber 11.

[0071] The automatic start and stop of the gas supply device 4 according to the temperature of the liquid in the cooking chamber 11 realizes automatic control, facilitates user operation, and improves the user experience. For example, when the set temperature is 90 °C and the steam cooking appliance enters the cooking state, the control unit controls the steam generator 2 and the gas supply device 4 to start synchronously. When the temperature of the liquid in the cooking chamber 11 reaches 90 °C, the control unit controls the gas supply device 4 to stop automatically.

[0072] Of course, the gas supply device 4 and the steam generator 2 can also be started or stopped in other ways, which are not specifically limited herein.

[0073] As a preferred embodiment of the present application, the steam cooking appliance further includes an inner container 7 and a sound insulation member. The inner container 7 defines the cooking chamber 11, and the sound insulation member is disposed outside the inner container 7.

[0074] The arrangement of the sound insulation member blocks the sound from the inner container 7 from being transmitted out, reducing the sound transmitted to the outside and further reducing the impact of noise on the user. Preferably, the sound insulation member is made of a heat-insulating material so that it can not only achieve a sound insulation effect but also play a heat preservation role for the food in the inner container 7, concentrating the heat in the inner container 7, improving the heating and heat preservation effects on the food, and preventing the heat in the inner container 7 from being dissipated through the wall of the inner container 7.

[0075] What is not described in this application can be realized by adopting or referring to the existing technologies.

[0076] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the key points of each embodiment are the differences from other embodiments.

[0077] The above are only the embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A steam cooking appliance, comprising a pot body having a cooking cavity and a steam generator, characterized in that, Comprising: A steam outlet, located below the liquid level of the liquid in the cooking cavity; The steam cooking appliance further includes a gas supply device for delivering gas into the cooking cavity. The steam generated by the steam generator is mixed with the gas delivered by the gas supply device to form a mixed fluid, and the mixed fluid flows into the cooking cavity via the steam outlet.

2. The steam cooking appliance according to claim 1, wherein: The steam cooking appliance is provided with a fluid passage connecting the steam generator and the steam outlet. The gas supply device includes a blowing member, the air outlet of the blowing member is communicated with the fluid passage, the blowing member is used for pumping air into the fluid passage, and the blowing member is arranged on the pot body; or, The steam cooking appliance further includes a pot lid covering the pot body, and the blowing member is arranged on the pot lid.

3. The steam cooking appliance according to claim 1, wherein: The volume of the gas accounts for 0.5%-5% of the volume of the mixed fluid.

4. The steam cooking appliance according to claim 1, wherein: It further includes a steam guiding member extending into the cooking cavity from top to bottom. The steam guiding member is communicated with the steam generator and is provided with the steam outlet.

5. The steam cooking appliance according to claim 1, wherein: It further includes a steam nozzle for delivering steam to the cooking cavity from bottom to top. The steam nozzle is communicated with the steam generator and is provided with the steam outlet.

6. The steam cooking appliance according to claim 2, wherein: The steam cooking appliance further includes an air flow passage communicating the fluid passage and the steam outlet, and the gas enters the fluid passage via the air flow passage.

7. The steam cooking appliance according to claim 6, wherein: The air flow passage is further provided with a heating device for heating the gas in the air flow passage to reduce the temperature difference between the gas and the steam.

8. The steam cooking appliance according to claim 1, wherein: The steam cooking appliance further includes a control unit electrically connected to the gas supply device and the steam generator respectively. The control unit controls the gas supply device and the steam generator to start or stop synchronously; or, The control unit controls the gas supply device and the steam generator to start or stop at intervals.

9. The steam cooking appliance according to claim 8, wherein: The steam cooking appliance further includes a temperature measuring device electrically connected to the control unit. The temperature measuring device is used for detecting the temperature of the liquid in the cooking cavity, and the control unit is configured to control the start or stop of the gas supply device according to the temperature of the liquid in the cooking cavity.

10. The steam cooking appliance according to claim 1, wherein: The steam cooking appliance further includes an inner pot and a sound insulation member. The inner pot encloses the cooking cavity, and the sound insulation member is arranged on the outer side of the inner pot.

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