CN115606991A

CN115606991A - Steam cooking device

Info

Publication number: CN115606991A
Application number: CN202110808883.9A
Authority: CN
Inventors: 石柱; 林晨; 刘和成; 张红帅; 司鹏
Original assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2023-01-17
Also published as: WO2023284849A1

Abstract

The utility model relates to a steam type cooking equipment relates to electrical apparatus technical field for the kitchen. The steam cooking apparatus includes: a cabinet including a cooking cavity having an air hole; an oxygen exhaust configured to exhaust oxygen in the cooking cavity through the air hole; a steam injection device configured to inject steam into the cooking cavity; and the control device is configured to control the steam injection device to be started after the oxygen exhaust device finishes working. This steam formula cooking equipment not only can satisfy people to the healthy demand of culinary art food, and cooking efficiency is also higher moreover.

Description

Steam cooking apparatus

Technical Field

The disclosure relates to the technical field of kitchen appliances, in particular to steam type cooking equipment.

Background

With the development of global economy and improvement of living standard, people's attention to food health indexes is increasing day by day. Compared with the traditional cooking modes such as frying and high-temperature baking, steam cooking is more and more favored due to the cooking characteristics such as fat reduction, oil reduction, nutrition preservation and the like.

However, during steam cooking, certain components in the food react with oxygen due to the presence of oxygen around the food, potentially producing harmful substances, such as heterocyclic amines. It was found that the amount of heterocyclic amine produced correlated with the oxygen level around the food when cooked.

Meanwhile, in urban life, the work and life rhythm of people is faster and faster, and the cooking time is very sensitive. At present, the cooking speed of steam cooking devices is still not ideal enough.

Disclosure of Invention

The present disclosure is directed to solving at least one of the technical problems of the prior art. Therefore, the present disclosure is directed to a steam cooking apparatus capable of satisfying health needs of people for cooking food and having high cooking efficiency.

A steam cooking apparatus according to an embodiment of the present disclosure includes: a cabinet including a cooking cavity having an air hole; an oxygen exhaust configured to exhaust oxygen in the cooking cavity through the air hole; a steam injection device configured to inject steam into the cooking cavity; and the control device is configured to control the steam injection device to be started after the oxygen exhaust device finishes working.

According to the steam cooking device of the above embodiment of the present disclosure, the oxygen discharging device can firstly discharge as much oxygen as possible from the cooking cavity to reduce the oxygen concentration in the cooking cavity, and then the high-speed steam injected by the steam injection device can quickly surround the food to heat and cook the food. Because when cooking food, the oxygen concentration in the cooking cavity of the steam type cooking equipment is low enough, therefore, the harmful substances possibly generated by the reaction of oxygen and high-temperature food can be greatly reduced, and the health requirement of people on the cooking food is met. When cooking food, fill into steam to the culinary art intracavity through the mode of spraying, can realize the quick heat transfer of steam and food, shorten the culinary art time of food to can improve the efficiency of culinary art.

The steam cooking device according to the above-mentioned embodiment of the present disclosure may further have any one or a combination of any more of the following additional technical features:

according to the steam cooking device of one embodiment of the present disclosure, the cabinet further includes a pressure chamber spaced from the cooking chamber by a perforated plate including a plurality of through holes communicating the pressure chamber with the cooking chamber; the steam cooking apparatus further includes: a steam generating device configured to deliver steam into the pressure chamber and/or to the steam injection device; and a steam delivery device configured to deliver steam in the cooking cavity to the steam injection device; steam formula cooking equipment includes oxygen discharge working phase and is located the culinary art working phase after the oxygen discharge working phase, controlling means control steam generating device opens and control steam discharge device closes, so that the oxygen in the culinary art intracavity passes through the gas pocket is discharged, and culinary art working phase, controlling means control steam discharge device opens, so that steam passes through steam jet device to the culinary art intracavity sprays.

Due to the relatively high steam pressure in the pressure chamber, the steam can enter the cooking chamber with relatively low pressure through the plurality of through holes of the pore plate, so that the oxygen in the cooking chamber is exhausted as much as possible.

According to the steam cooking apparatus of one embodiment of the present disclosure, the air hole is located at a lower portion of the cooking cavity, and the pressure cavity is located above the cooking cavity, so that steam enters the cooking cavity from the pressure cavity.

In the whole air exhausting process, the gas density in the cooking cavity is in a positive density gradient, so that the mixing of steam and air can be reduced to the maximum extent, and the air is exhausted as much as possible, namely, the oxygen in the air is exhausted as much as possible, so that the oxygen concentration in the cooking cavity is reduced to the minimum.

According to the steam cooking apparatus of one embodiment of the present disclosure, the number of the steam injection devices is at least two, and the at least two steam injection devices are respectively disposed at both sides of the central region of the cooking cavity. The embodiment scheme can make the steam around the food in the cooking cavity more uniform, thereby further improving the efficiency of heating the food.

According to a steam cooking apparatus of an embodiment of the present disclosure, the steam injection device includes: the spray structure comprises a central conveying pipe and a spray structure arranged along the extension direction of the central conveying pipe, wherein the conveying tail end of the central conveying pipe is closed, and the cross section area of a pipe cavity of the central conveying pipe is decreased gradually along the direction towards the conveying tail end. In this way, the flow rate of the steam emitted downstream from the central duct can be attenuated to a certain extent, so that the flow rate of the steam emitted from the steam spraying device is relatively uniform.

According to the steam cooking apparatus of some embodiments of the present disclosure, the injection structure may be designed to: comprises a plurality of nozzles arranged along the extension direction of the central conveying pipe; or the jet structure is a slit which is arranged on the pipe wall of the central conveying pipe and extends along the extending direction of the central conveying pipe.

According to the steam cooking device of one embodiment of the present disclosure, at least two steam injection devices are provided at the top of the cooking cavity; or at least two steam injection devices are arranged on the peripheral side of the cooking cavity.

According to the steam cooking apparatus of one embodiment of the present disclosure, the number of the steam discharging devices is at least two, and each of the steam discharging devices is connected to one or more of the steam injection devices. Through two at least steam discharging device with steam to aforementioned two at least steam jet device transport, can improve the cyclic utilization efficiency of cooking intracavity steam, make the steam in the cooking intracavity keep higher velocity of flow to shorten food culinary art time, promote the efficiency of culinary art.

The steam cooking apparatus according to an embodiment of the present disclosure, further comprising: and the heating device is arranged in at least one of the steam discharging device, the steam spraying device and a steam conveying path between the steam discharging device and the steam spraying device.

According to the steam cooking device of one embodiment of the present disclosure, the steam discharging device is a centrifugal fan, and the heating device is annular and surrounds the periphery of an impeller of the centrifugal fan.

Above-mentioned embodiment design, steam formula cooking equipment is when culinary art food, and steam rethread steam jet device sprays to the culinary art chamber after the heating of heating device, can further improve the temperature of culinary art intracavity steam to further improve the efficiency of culinary art.

According to the steam cooking device of one embodiment of the present disclosure, the pressure chamber has at least two steam inlets, and the steam generating device supplies steam to the at least two steam inlets of the pressure chamber through the branch pipe. Therefore, the steam can be quickly and uniformly filled in the pressure cavity, and the working efficiency of the steam cooking equipment is improved.

According to the steam cooking device of one embodiment of the present disclosure, a time interval between the oxygen discharging operation stage and the cooking operation stage is not less than zero. For example, the time interval may be zero or close to zero, which may further shorten the cooking time of the food.

According to the steam type cooking equipment of one embodiment of the disclosure, the working time of the steam type cooking equipment in the oxygen discharging working phase is a first preset time, and the working time of the steam type cooking equipment in the cooking working phase is a second preset time.

The steam cooking device according to one embodiment of the present disclosure further includes an oxygen concentration detection device configured to acquire a concentration of oxygen in the cooking cavity; the control device is also configured to control to start the oxygen discharging working phase and to close the cooking working phase in response to the concentration of the oxygen in the cooking cavity being higher than a concentration threshold; and controlling to close the oxygen discharging working stage and to open the cooking working stage in response to the fact that the concentration of the oxygen in the cooking cavity is not higher than a concentration threshold value. In this embodiment, the duration of the oxygen discharge operation stage is determined by the actual concentration of oxygen in the cooking chamber, so that the concentration of oxygen in the cooking chamber can be controlled more accurately, and thus more sufficient oxygen discharge is realized.

According to the steam cooking device of one embodiment of the present disclosure, the control device is further configured to control the steam generation device to be turned off or to control the operating power of the steam generation device to be smaller than that in the oxygen discharging operating phase during the cooking operating phase. Because the steam can be recycled through the steam discharging device in the cooking working phase and the concentration of the steam in the cooking cavity is relatively high, the steam generating device can be turned off or the working power of the steam generating device can be properly reduced in the cooking working phase so as to reduce the energy consumption of the equipment.

According to a steam cooking device of an embodiment of the present disclosure, the steam cooking device includes a steam box, a steaming and baking integrated machine, a micro-steaming integrated machine or a micro-steaming and baking integrated machine.

Drawings

In the drawings, like reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily to scale. It is appreciated that these drawings depict only some embodiments in accordance with the disclosure and are therefore not to be considered limiting of its scope.

Fig. 1 is a schematic view showing a steam cooking apparatus in the related art;

fig. 2 illustrates a front view of a steam cooking apparatus according to some exemplary embodiments of the present disclosure;

FIG. 3 illustrates a front view of a steam cooking appliance operating in an oxygen-exclusion operating phase according to some exemplary embodiments of the present disclosure;

fig. 4A illustrates a concentration distribution simulation diagram of steam at several different times after entering a cooking chamber according to some exemplary embodiments of the present disclosure;

fig. 4B is a graph showing a concentration distribution simulation of steam at several different times after entering a cooking chamber according to a steam cooking apparatus in the related art;

fig. 5 illustrates a front view of a steam cooking apparatus operating in a cooking operation stage according to some exemplary embodiments of the present disclosure;

fig. 6 illustrates a simulated cloud of steam velocity inside a cooking cavity along a longitudinal cross-section when a steam cooking apparatus according to some exemplary embodiments of the present disclosure is operated in a cooking operation stage;

fig. 7 illustrates a perspective view of a cabinet of a steam cooking apparatus according to some exemplary embodiments of the present disclosure;

fig. 8 illustrates a perspective view of a cabinet, a steam spraying device, and a steam discharging device of a steam cooking apparatus according to some exemplary embodiments of the present disclosure;

fig. 9 illustrates a front view of a cabinet, a steam injection device, and a steam discharge device of a steam cooking apparatus according to some exemplary embodiments of the present disclosure;

fig. 10 illustrates a perspective view of a steam injection device and a steam discharge device of a steam cooking apparatus according to some exemplary embodiments of the present disclosure;

fig. 11 illustrates a steam cooking apparatus with a simulated cloud of the velocity of steam emitted from a steam injection device, according to some exemplary embodiments of the present disclosure;

fig. 12 illustrates a perspective view of a steam injection device of a steam cooking apparatus according to some exemplary embodiments of the present disclosure;

fig. 13 illustrates a perspective view of a steam injection device of a steam cooking apparatus according to some exemplary embodiments of the present disclosure;

fig. 14 illustrates a front view of a steam cooking apparatus according to some exemplary embodiments of the present disclosure; and

fig. 15 illustrates a front view of a steam cooking apparatus according to some exemplary embodiments of the present disclosure.

Description of reference numerals:

in the related art:

100-steam type cooking device; 101-a cooking cavity; 102-a water box; 103-a heater; 104-bracket.

In the embodiment of the disclosure:

200-steam cooking device; 210-a box; 220-a steam generating device; 260-branch circuit;

230-a steam injection device; 240-steam discharge means; 250-a control device; 270-a housing; 211-well plate;

2110-through holes; 2110a — a first via; 2110b — a second via; 211 a-a first region; 211 b-second region;

212-a cooking cavity; 213-a pressure chamber; 2130-steam inlet; 2120-air holes; 212 a-left sidewall; 212 b-right sidewall;

212 c-back sidewall; 212 d-bottom wall; 212 e-a top wall; 2301-a central delivery tube; 2302-jet configuration;

280-oxygen concentration detection means; 2121-grid holes; 2401-an impeller; 2402-a volute; 2403-air inlet side;

2404-air outlet; 2405-a heating device; 2302 a-nozzle; 2302 b-leaf; 2302 c-slit; 290-a tray;

300-a food; 400-air; 500-steam.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present application. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

As shown in fig. 1, in a steam cooking apparatus 100 of the related art, a water box 102 is provided at a bottom of a cooking cavity 101, and a heater 103 is provided in the water box 102. When the steam cooking apparatus 100 is operated, the heater 103 heats water in the water tank 102 to be converted into high-temperature water vapor and to diffuse in the cooking cavity 101, thereby heating food on the rack 104.

As described in the foregoing background, the steam cooking apparatus 100 not only diffuses steam but also contains a large amount of oxygen around the food during the operation. The oxygen reacts with certain components in the high-temperature food, and harmful substances which are not good for human health may be generated. Health safety issues associated with cooking food items in such a steam cooking apparatus 100 are of increasing concern.

The inventor of the present disclosure also has noticed that, in the steam cooking apparatus 100 of the related art, after the steam enters the cooking cavity 101, the flow rate is low, and the flow direction is not planned, so that the efficiency of heating the food is not high, and the whole cooking process takes a long time. For example, steaming eggs typically takes 20 minutes or more, which clearly does not meet the cooking requirements of some fast paced people.

In order to solve the above technical problem, the embodiment of the present disclosure provides a steam cooking apparatus, which not only can satisfy the health requirement of people for cooking food, but also has high cooking efficiency.

In the embodiment of the present disclosure, the steam cooking device may be a desktop steam cooking device, or may be an embedded steam cooking device that can be embedded in a wall or under a table, which is not specifically limited by the present disclosure.

The core function of the steam cooking device at least comprises steaming, and in addition, the core function can also comprise one or more of functions of microwave, baking, microwave steaming, microwave baking, steam baking and the like. The specific product type of the steam cooking device is not limited, and for example, the steam box, the steaming and baking integrated machine, the micro-steaming and baking integrated machine and the like can be used.

After the steam cooking equipment provided by the embodiment of the disclosure starts steam cooking, the working process comprises the following two working stages:

1. and (5) an oxygen discharge working stage. In the oxygen discharging working stage, the oxygen in the cooking cavity is discharged as much as possible to reduce the oxygen concentration in the cooking cavity. Because oxygen exists in the air, the aim of exhausting the oxygen can be achieved by exhausting the air in the cooking cavity, and the oxygen exhausting working phase is also the working phase of exhausting the air.

2. And (4) a cooking working stage. During this cooking phase, the food is heated to cook by the high velocity steam jet rapidly surrounding the food. Because the concentration of oxygen in the cooking cavity is low enough in the cooking working stage, harmful substances possibly generated by the reaction of oxygen and high-temperature food can be greatly reduced, and the health and nutrition of the food are ensured. In addition, steam is filled into the cooking cavity in a spraying mode, so that quick heat exchange between the steam and food can be realized, and the cooking time of the food is shortened.

The main structure of the steam cooking equipment comprises a box body, an oxygen exhaust device and a steam injection device, wherein the box body comprises a cooking cavity, the cooking cavity is provided with air holes, the oxygen exhaust device is configured to exhaust oxygen in the cooking cavity through the air holes, and the steam injection device is configured to inject steam into the cooking cavity. The specific type of the oxygen discharging device is not limited, and for example, the oxygen discharging device may be a vacuum device that discharges oxygen based on a vacuum manner, or may be a specific structural design of the box body that discharges oxygen based on a pressure difference of gas. The air hole of the cooking cavity is not limited in setting position, for example, when the oxygen exhaust device realizes the oxygen exhaust based on the vacuumizing mode, the air hole can be set at any position of the cooking cavity, and the oxygen exhaust device extracts the oxygen in the cooking cavity through the air hole.

In some embodiments of the present disclosure, the time interval between the oxygen evacuation operational phase and the cooking operational phase is not less than zero. For example, the time interval may be zero or close to zero, so that the steam cooking device can quickly enter the cooking operation phase after the oxygen discharge operation phase is finished. When the steam cooking device works, the control device (such as a microprocessor) automatically switches the oxygen discharging working stage and the cooking working stage according to the set control logic so as to further shorten the cooking time of food.

In some embodiments, the cabinet further includes a pressure chamber spaced from the cooking chamber by an orifice plate including a plurality of through holes communicating the pressure chamber with the cooking chamber. The steam type cooking equipment further comprises a steam generating device, a steam discharging device and a control device, wherein the steam generating device is configured to convey steam into the pressure cavity and/or convey steam into the steam spraying device, the steam discharging device is configured to convey the steam in the cooking cavity to the steam spraying device, the control device controls the steam generating device to be opened and controls the steam discharging device to be closed in an oxygen discharging working stage, so that oxygen in the cooking cavity is discharged through the air holes, and the control device controls the steam discharging device to be opened in the cooking working stage, so that the steam is sprayed into the cooking cavity through the steam spraying device.

Due to the relatively high steam pressure in the pressure chamber, the steam can enter the cooking chamber with relatively low pressure through the plurality of through holes of the pore plate, so that the oxygen in the cooking chamber is exhausted as much as possible. Wherein the relative positions of the cooking chamber and the pressure chamber are not limited. The oxygen discharging device of the embodiment is designed to discharge oxygen through the specific structural design (such as a pressure chamber, an orifice plate, an air hole and the like) of the box body based on the pressure difference of the gas.

As shown in fig. 2, which is a front view of a steam cooking apparatus 200 according to some exemplary embodiments of the present disclosure. The steam cooking apparatus 200 mainly includes a cabinet 210, a steam generating device 220, a steam spraying device 230, a steam discharging device 240, and a control device 250. In this embodiment, the steam cooking apparatus 200 is a front opening type steam cooking apparatus, and the cabinet 210 is a main body of the steam cooking apparatus 200 and is located in the housing 270.

In the embodiment of the present disclosure, the descriptions about the upper, lower, left, right, top, bottom, front, back, etc. are all with reference to the general placement state of the steam cooking apparatus 200, for example, the side of the apparatus or its components closer to the operator is defined as the front side, the side further away from the operator is defined as the back side, the side of the apparatus or its components on the left hand side of the operator is defined as the left side, the side on the right hand side of the operator is defined as the right side, and so on.

As shown in fig. 2, the cabinet 210 includes a cooking chamber 212 and a pressure chamber 213 spaced apart by an orifice plate 211. A rack (not shown) and/or a tray 290 or the like may be provided within the cooking cavity 212 for carrying cooking aids for the food 300. The lower portion of the cooking chamber 212 has air holes 2120 for discharging oxygen (i.e., air holes for discharging air), and the air holes 2120 may be located at the bottom wall or one of the side walls of the cooking chamber 212, as shown in the drawing, the back side wall 212c.

The pressure chamber 213 is located above the cooking chamber 212, and the steam generated by the steam generating device 220 is delivered to the pressure chamber 213 (e.g., the branch line 260 shown in the figure). The orifice plate 211 includes a plurality of through holes 2110 to communicate the pressure chamber 213 with the cooking chamber 212, so that steam within the pressure chamber 213 may be introduced into the cooking chamber 212 having a relatively low pressure. For example, the steam supplied through the pressure chamber 213 uniformly enters the cooking chamber 212 from substantially the entire bottom surface of the pressure chamber 213.

In this embodiment, the cooking chamber 212 is substantially in the shape of a rectangular parallelepiped including a left side wall 212a, a right side wall 212b, a back side wall 212c, a bottom wall 212d, and a top wall 212e constituted by a lower surface of the orifice plate 211 as shown in the drawing. When the front door of the steam cooking apparatus 200 is closed, the inner sidewall of the front door serves as the front sidewall of the cooking chamber 212. In the embodiment of the present disclosure, the box 210 is, for example, a sheet metal box.

The steam spray device 230 and the steam discharge device 240 are both turned on during the cooking operation. A steam delivery device 240, such as a centrifugal fan or other negative pressure device, is used to deliver steam from the cooking chamber 212 to the steam injection device 230. The steam injection device 230 is used for injecting steam into the cooking cavity 212 in an injection manner so that the steam rapidly surrounds the food 300 on the cooking aid, thereby heating the food 300 to be cooked.

The control device 250 is used for realizing automatic control of the steam cooking apparatus 200, so as to realize automatic switching from the oxygen discharging operation stage to the cooking operation stage, specifically, in the oxygen discharging operation stage, the control device 250 controls the steam generating device 220 to be turned on and controls the steam delivering device 240 to be turned off, and in the cooking operation stage, the control device 250 controls the steam delivering device 240 to be turned on, and also can control the steam generating device 220 to be turned on at the same time. It is understood that, in fig. 2, the arrangement positions of the steam generating device 220 and the control device 250 in the steam cooking apparatus 200 are only schematic and do not represent the actual arrangement positions thereof, and the specific arrangement positions can be flexibly designed according to the requirements.

The operation and the operation principle of the steam cooking device 200 according to the embodiment of the present disclosure will be described in detail.

As shown in fig. 3, during the oxygen discharging operation, the steam 500 generated by the steam generating device 220 can enter the cooking cavity 212 through the plurality of through holes 2110 on the orifice plate 211 after entering the pressure cavity 213.

The inventors of the present disclosure discovered in the course of practicing the disclosed embodiments that the temperature of the air inside the cooking chamber 212, just prior to the steam entering, is close to the temperature of the outside environment, with a density of about 1.2kg/m ³ And the density of the steam is about 0.6kg/m ³ . The difference in density between the steam and the air causes the steam just entering the cooking cavity 212 to float on the top area of the cooking cavity 212, and as the steam 500 continues to enter, the steam 500 pushes the air 400 downward, thereby forcing the air 400 to gradually exit from the air holes 2120 in the lower portion of the cooking cavity 212. In the whole air exhausting process, the density of the gas in the cooking cavity 212 is in a positive density gradient, that is, the density of the gas is increased in a gradient manner from top to bottom, so that the mixing of the steam and the air can be reduced to the maximum extent, and therefore, the air is exhausted as much as possible, that is, the oxygen in the air is exhausted as much as possible, and the oxygen concentration in the cooking cavity 212 is reduced to the minimum.

Fig. 4A is a graph of a concentration profile simulation of steam at several different times after entering a cooking chamber in some embodiments of the present disclosure. It will be appreciated that the greater the concentration of steam in the cooking chamber, the less the concentration of air and the less the concentration of oxygen in the air. As shown in fig. 4A, during the oxygen discharge, the concentration stratification of the steam and air is clearly visible, and the interface between the two advances downward over time as if it were a piston until the air is sufficiently discharged. Fig. 4B is a simulation diagram of steam concentration distribution obtained by the inventor of the present disclosure under the same time parameters, using a steam cooking apparatus of the related art as a comparative example. It can be seen that, during the operation of the steam cooking apparatus, the concentration of the air in the cooking cavity is relatively high, the concentration of the steam is significantly less than that in fig. 4A, and moreover, the distribution of the steam is not uniform enough, and the concentration of the steam in the central area of the cooking cavity is less than that in the peripheral area.

Therefore, the steam cooking device 200 provided by the embodiment of the disclosure can greatly reduce the oxygen content in the cooking cavity 212, thereby reducing harmful substances generated by the reaction of oxygen and high-temperature food, and satisfying the health requirement of people on the cooked food.

As shown in fig. 5, the steam discharging means 240 enters the cooking operation stage after the oxygen discharging operation stage is finished. During the cooking operation stage, the steam discharging means 240 delivers the steam 500 in the cooking cavity 212 to the steam injection means 230, so that the steam injection means 230 injects the steam 500 into the cooking cavity 212; at the same time, the steam generating device 220 may continue to supply steam 500 into the cooking chamber 212 through the pressure chamber 213. Because the steam is injected into the cooking cavity 212 in a spraying manner, compared with the related art, the flow rate of the steam is greatly improved, and the steam flowing at a high speed can quickly surround the food on the cooking aid, so that the effect of heat exchange enhancement is achieved, and the cooking time of the food is greatly shortened.

As shown in fig. 6, in some embodiments of the present disclosure, the steam velocity inside the cooking cavity 212 in the cooking stage along the longitudinal section simulates a cloud. As can be seen from the figure, the steam with a higher flow rate, when reaching the cooking aid such as a tray, collides with the cooking aid and is then redirected by the surface of the cooking aid to spread rapidly along the surface of the cooking aid, thereby surrounding the food on the cooking aid as a whole. In addition, as can be seen from the figure, the steam with higher flow rate is mainly concentrated above the cooking assistant tool, namely, is mainly concentrated in the food placing area, so that the temperature of the steam in the food placing area is higher than that in other areas, the steam can quickly exchange heat with the food, and the aims of shortening the food cooking time and improving the cooking efficiency are fulfilled.

Therefore, the steam cooking device 200 provided by the embodiment of the disclosure can effectively shorten the time for cooking food and improve the cooking efficiency on the premise of meeting the health requirement of people on cooking food.

In some embodiments of the present disclosure, the steam cooking apparatus has a first preset time period in the oxygen discharging operation stage and a second preset time period in the cooking operation stage. The first preset time duration can be set before the equipment leaves a factory, and the second preset time duration can be set according to the specific function design of the steam cooking equipment, not only before the equipment leaves the factory, but also selected and set by a user according to cooking requirements. For example, in one embodiment, the user selects to activate the egg steaming function of the steam cooking device for a first predetermined period of time of 1 minute and a second predetermined period of time of 9 minutes, after the first predetermined period of time, the oxygen concentration in the cooking chamber is sufficiently low, and after the second predetermined period of time, the eggs can be quickly steamed by the steam flow emitted by the steam injection device.

In other embodiments of the present disclosure, as shown in fig. 2, steam cooking apparatus 200 further includes an oxygen concentration detecting device 280 for acquiring an oxygen concentration in cooking cavity 212, and a probe of oxygen concentration detecting device 280 is exposed in cooking cavity 212, for example, is disposed at a bottom of cooking cavity 212. The aforementioned control device 250 is further configured to control the on-off oxygen discharging operation phase and the off-off cooking operation phase in response to the oxygen concentration being higher than the concentration threshold, that is, in this embodiment, the steam generating device 220 is controlled to be on and the steam delivering device 240 is controlled to be off; and, in response to the oxygen concentration not being higher than the concentration threshold, controlling to turn off the oxygen discharging operation phase and turn on the cooking operation phase, in this embodiment, that is, controlling to turn on the steam discharging device 240, the steam generating device 220 may also be turned on.

In this embodiment, the duration of the oxygen discharging operation period is determined by the actual concentration of oxygen in the cooking chamber 212, so that the concentration of oxygen in the cooking chamber 212 can be controlled more precisely, and thus more sufficient oxygen discharging can be achieved.

In some embodiments of the present disclosure, the control device 250 is further configured to control the steam generating device 220 to be turned off or to control the operating power of the steam generating device 220 to be smaller than that in the oxygen discharging operating period during the cooking operating period. Since the steam can be recycled through the steam discharging device 240 during the cooking operation period and the concentration of the steam in the cooking cavity 212 is relatively high as described above, the steam generating device 220 can be turned off during the cooking operation period, or the operating power of the steam generating device 220 can be reduced appropriately to reduce the energy consumption of the apparatus.

The structural design of the steam cooking apparatus 200 according to some embodiments of the present disclosure is described in further detail below.

As shown in fig. 2 and 7, in these embodiments, two steam inlets 2130 of the pressure chamber 213 are provided at the left and right sides of the steam cooking apparatus 200. The steam generating device 220 can simultaneously supply steam to the two steam inlets 2130 through the branch line 260, so that the pressure chamber 213 can be filled with steam quickly and uniformly. Of course, the number of the steam inlets 2130 is not limited to two, and may be one or more than two, for example. The present disclosure also does not particularly limit the position of the steam inlet 2130, and the corresponding design may be made with reference to the design position of the steam generator.

As shown in fig. 8, in some embodiments of the present disclosure, the aperture plate 211 includes a first region 211a and a second region 211b surrounding the first region 211a, and the plurality of through holes 2110 includes a plurality of first through holes 2110a located in the first region 211a and a plurality of second through holes 2110b located in the second region 211b, wherein the arrangement density of the first through holes 2110a is greater than that of the second through holes 2110 b. The steam reaches above the second region 211b in the pressure chamber 213, and the tangential flow velocity (i.e. the velocity in the tangential direction of the orifice plate 211) in this second region 211b is higher and the pressure is lower, and then reaches above the first region 211a and the tangential flow velocity in this first region 211a is lower and the pressure is increased. In this embodiment, the plurality of through holes 2110 adopt a design with dense middle and sparse periphery, which can reduce the pressure of the steam above the first region 211a to a certain extent, thereby effectively improving the backflow caused by the steam pressure difference and facilitating the steam to be uniformly released to the cooking cavity 212.

In another embodiment of the present disclosure, the plurality of through holes may be designed such that the arrangement density of the first through holes and the second through holes is substantially the same, but the aperture of the first through holes is larger than that of the second through holes, and the embodiment can also obtain similar technical effects based on the above principle. In another embodiment of the present disclosure, the density design and the aperture differentiation design for the plurality of through holes can be combined to achieve similar technical effects.

Of course, the size and arrangement density of the plurality of through holes on the orifice plate are not limited to the above embodiments, for example, the plurality of through holes on the orifice plate may have the same aperture and be uniformly distributed.

As shown in fig. 2, when the steam cooking apparatus 200 is used, the food 300 is generally placed in the central area of the cooking chamber 212, i.e., directly above the middle position of the bottom wall 212d of the cooking chamber 212. As shown in fig. 5 and 9, in the embodiment of the present disclosure, the number of the steam injection devices 230 is two, the two steam injection devices 230 are symmetrically disposed at both sides of the central region of the cooking cavity 212, and the steam 500 is symmetrically injected toward the central region of the cooking cavity 212, so that the steam around the food 300 can be more uniform, thereby further improving the efficiency of heating the food 300. In other embodiments of the present disclosure, the number of the steam injection means may also be more than two and distributed at both sides of the central region of the cooking cavity.

As shown in fig. 10, in these embodiments, the steam discharging device 240 is a centrifugal fan, is also two in number, and is provided in one-to-one correspondence with the two steam injection devices 230. That is, each of the steam discharge devices 240 is configured to deliver the steam 500 within the cooking cavity to a corresponding one of the steam injection devices 230. Carry steam 500 one-to-one to two steam jet device 230 through two steam discharging device 240, can improve the cyclic utilization efficiency of the intracavity steam of cooking, make the steam of the intracavity of cooking keep higher velocity of flow to shorten food culinary art time, promote the efficiency of culinary art.

The present disclosure does not limit the specific number of the steam injection devices and the steam discharging devices, for example, the number of the steam discharging devices may be one, and the steam is simultaneously supplied to the two steam injection devices through a specially designed branch pipeline. For example, the number of the steam injection devices may be one, and the steam injection devices are disposed at the top of the cooking cavity near the back sidewall. In some embodiments, the number of the steam discharging devices is at least two, and each steam discharging device is connected with one or more steam injection devices to deliver steam to the one or more steam injection devices.

As shown in fig. 9 and 10, the steam discharging means 240 is a centrifugal fan provided outside the back side wall 212c of the cooking chamber 212, and the back side wall 212c of the cooking chamber 212 has a plurality of grill holes 2121 in a region opposite to the air intake side 2403 of the centrifugal fan (the steam discharging means 240 is shielded by the plurality of grill holes 2121 in fig. 9 and thus is only illustrated by a dotted line). The centrifugal fan accelerates the steam 500 using the impeller 2401 rotating at a high speed, and then decelerates, changes the flow direction, and converts kinetic energy into potential energy (i.e., pressure of the gas). As shown in fig. 10, the centrifugal fan includes a volute 2402 and an impeller 2401 located inside the volute 2402. The steam 500 enters the volute 2402 from the air inlet side 2403 of the centrifugal fan along the axial direction, changes the flow direction into the radial direction after being acted by the impeller 2401, and is discharged from the air outlet 2404 of the volute 2402 to enter the steam injection device 230. In some embodiments of the present disclosure, the air outlet 2404 of the volute 2402 is in communication with the steam inlet of the steam injection device 230.

As shown in fig. 10, a heating device 2405 is further disposed in the volute 2402 of the centrifugal fan, for heating the steam 500 entering the volute 2402. The specific type and structure of the heating means 2405 are not limited, and may be, for example, a heating pipe having a ring shape and surrounding the circumference of the impeller 2401 as shown in the drawing. The steam 500 is heated by the heating device 2405 in the spiral case 2402 and then is sprayed to the cooking cavity by the steam spraying device 230, so that the temperature of the steam in the cooking cavity can be further increased, and the cooking efficiency can be further improved.

In other embodiments of the present disclosure, the heating device may also be provided within the steam injection device or in the steam delivery path between the steam discharge device and the steam injection device. The number of heating devices is also not limited to one.

As shown in fig. 10, in some embodiments of the present disclosure, the steam injection device 230 includes: a central duct 2301 and a spray structure 2302 arranged along the extension direction of the central duct 2301, wherein the delivery end of the central duct 2301 (i.e. the end of the central duct 2301 in the delivery direction of the steam 500, the delivery direction of the steam 500 in the central duct 2301 being as indicated by the dashed arrow therein) is closed, and the lumen cross-sectional area of the central duct 2301 decreases in the direction towards the delivery end. The specific shape of the central delivery tube 2301 is not limited, for example, the cross-sectional shape of its lumen may be circular, rectangular, trapezoidal, or the like. For example, the central duct 2301 shown in fig. 10 has a shape that is wider first and narrower second in the direction of the steam 500.

In the embodiment shown in fig. 10, the injection structure 2302 includes a plurality of nozzles 2302a arranged along the extending direction of the central duct 2301, so that the steam 500 is injected from the plurality of nozzles 2302a, respectively.

In carrying out embodiments of the present disclosure, the inventors of the present disclosure have found that if the lumen cross-sectional area of the central delivery tube 2301 is constant, then the pressure of the steam flow field downstream (i.e., closer to the delivery end of the central delivery tube 2301 in the direction of extension of the central delivery tube 2301) tends to be greater according to bernoulli's principle, thereby causing a higher flow rate of steam to be emitted downstream from the central delivery tube 2301. In the disclosed embodiment, the cross-sectional area of the lumen of the central duct 2301 decreases in a direction toward the delivery tip, which can attenuate the flow rate of steam emitted downstream from the central duct 2301 to some extent, thereby making the flow rate of steam 500 emitted from the steam emitting device 230 more uniform.

As shown in fig. 11, a simulated cloud of the velocity of the steam emitted from the steam spraying device 230 of the embodiment shown in fig. 10 is shown. It can be seen that the steam injection device 230 with the above-mentioned design can inject the steam into the cooking cavity along the direction perpendicular to the central duct 2301 at a relatively uniform flow rate, thereby achieving uniform and rapid heating of the food.

The jetting structure 2302 is not limited to designs that employ the nozzles 2302a described above. As shown in fig. 12, in other embodiments of the present disclosure, the injection structures 2302 may also be louvers, and a plurality of blades 2302b of the louvers extend in the extending direction of the central duct 2301, thereby allowing the steam 500 to be injected from the gaps between the adjacent blades 2302 b. In still other embodiments of the present disclosure, as shown in fig. 13, the injection structure 2302 may be a slit 2302c opened at the tube wall of the central duct 2301, so that the steam 500 may be injected from the slit 2302 c.

The present disclosure does not limit the specific arrangement positions of the steam injection means 230 and the steam discharging means 240. The two steam injection devices 230 may be provided at the top of the cooking cavity, or may be provided at the circumferential side of the cooking cavity. The steam discharging device 240 may be provided at a back side of the cooking chamber, and may be provided at a left side wall or a right side wall of the cooking chamber.

As shown in fig. 2 and 8, in these embodiments, two steam discharge devices 240 are provided outside the back side wall 212c of the cooking chamber 212, one steam injection device 230 is fixedly provided at an edge region of the top wall 212e adjacent to the left side wall 212a, and the other steam injection device 230 is fixedly provided at an edge region of the top wall 212e adjacent to the right side wall 212 b. The two steam injection devices 230 are oppositely disposed and inject steam toward a central region of the cooking chamber 212 in an obliquely downward direction.

As shown in fig. 14, in other embodiments of the present disclosure, two steam discharge devices 240 are provided outside the back side wall 212c of the cooking chamber 212, wherein one steam injection device 230 is fixedly provided at an edge region of the left side wall 212a adjacent to the top wall 212e, and the other steam injection device 230 is fixedly provided at an edge region of the right side wall 212b adjacent to the top wall 212e. The two steam injection devices 230 are oppositely disposed and inject steam toward a central region of the cooking chamber 212 in an obliquely downward direction.

As shown in fig. 15, in further embodiments of the present disclosure, two steam discharge devices 240 are provided at the outer side of the back side wall 212c of the cooking chamber 212, wherein one steam injection device 230 is fixedly provided at an edge region of the back side wall 212c adjacent to the left side wall 212a, and the other steam injection device 230 is fixedly provided at an edge region of the back side wall 212c adjacent to the right side wall 212 b. The two steam injection devices 230 simultaneously inject steam toward the central region of the cooking chamber 212. The two steam injection devices 230 are, for example, louver-type steam injection devices shown in fig. 12.

In conclusion, the steam cooking equipment provided by the embodiment of the disclosure can effectively shorten the time for cooking food and improve the cooking efficiency on the premise of meeting the health requirements of people on the cooked food.

It will be understood that in this specification, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like, indicate an orientation or positional relationship or dimension based on that shown in the drawings, and that such terms are used for convenience of description only and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered limiting to the scope of this application.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral parts thereof; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

This description provides many different embodiments or examples that can be used to implement the present application. It should be understood that these various embodiments or examples are purely exemplary and are not intended to limit the scope of protection of the present application in any way. Those skilled in the art can conceive of various changes or substitutions based on the disclosure of the specification of the present application, which are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope defined by the appended claims.

Claims

1. Steam cooking apparatus, characterized in that it comprises:

a cabinet including a cooking cavity having an air hole;

an oxygen exhaust configured to exhaust oxygen in the cooking cavity through the air hole;

a steam injection device configured to inject steam into the cooking cavity; and

and the control device is configured to control the steam injection device to be started after the oxygen exhaust device finishes working.

2. Steam cooking device according to claim 1,

the box body further comprises a pressure cavity, the pressure cavity is separated from the cooking cavity through a pore plate, and the pore plate comprises a plurality of through holes which are used for communicating the pressure cavity with the cooking cavity;

the steam cooking apparatus further includes:

a steam generating device configured to deliver steam into the pressure chamber and/or to the steam injection device; and

a steam discharge device configured to deliver steam within the cooking cavity to the steam injection device;

steam formula cooking equipment's working process includes oxygen discharge working phase and is located the culinary art working phase after the oxygen discharge working phase, controlling means control steam generating device opens and control steam discharge device closes, so that the oxygen in the culinary art intracavity passes through the gas pocket is discharged, and culinary art working phase, controlling means control steam discharge device opens, so that steam passes through steam jet device to the culinary art intracavity sprays.

3. Steam cooking device according to claim 2,

the air hole is located at a lower portion of the cooking cavity, and the pressure chamber is located above the cooking cavity such that steam enters the cooking cavity from the pressure chamber.

4. Steam cooking device according to claim 1,

the steam injection device is at least two, and the at least two steam injection devices are respectively arranged on two sides of the central area of the cooking cavity.

5. Steam cooking device according to claim 4,

the steam injection device includes: the spray structure comprises a central conveying pipe and a spray structure arranged along the extension direction of the central conveying pipe, wherein the conveying tail end of the central conveying pipe is closed, and the cross section area of a pipe cavity of the central conveying pipe is decreased gradually along the direction towards the conveying tail end.

6. Steam cooking device according to claim 5,

the spraying structure comprises a plurality of nozzles arrayed along the extension direction of the central conveying pipe; or alternatively

The jet structure is a slit which is arranged on the pipe wall of the central conveying pipe and extends along the extending direction of the central conveying pipe.

7. Steam cooking device according to claim 4,

at least two steam injection devices are arranged at the top of the cooking cavity; or

At least two steam jet devices are arranged on the periphery of the cooking cavity.

8. Steam cooking device according to claim 4,

the number of the steam discharging devices is at least two, and each steam discharging device is connected with one or more steam spraying devices.

9. Steam cooking apparatus as claimed in claim 2, characterised in that it further comprises:

and the heating device is arranged in at least one of the steam discharging device, the steam spraying device and a steam conveying path between the steam discharging device and the steam spraying device.

10. Steam cooking device according to claim 9,

the steam discharging and conveying device is a centrifugal fan, and the heating device is annular and surrounds the periphery of an impeller of the centrifugal fan.

11. Steam cooking device according to claim 2,

the steam generating device is used for conveying steam to the at least two steam inlets of the pressure cavity through a branch pipe.

12. Steam cooking device according to claim 2,

the time interval between the oxygen-discharging working phase and the cooking working phase is not less than zero.

13. Steam cooking device according to claim 2,

the steam type cooking equipment is in the working duration of the oxygen discharging working phase is a first preset duration, and the steam type cooking equipment is in the working duration of the cooking working phase is a second preset duration.

14. Steam cooking apparatus as claimed in claim 2, characterised in that it further comprises:

an oxygen concentration detection device configured to acquire a concentration of oxygen within the cooking chamber;

the control device is also configured to control to start the oxygen discharging working phase and to close the cooking working phase in response to the concentration of the oxygen in the cooking cavity being higher than a concentration threshold; and controlling to close the oxygen discharging working stage and to open the cooking working stage in response to the fact that the concentration of the oxygen in the cooking cavity is not higher than a concentration threshold value.

15. A steam cooking apparatus as claimed in claim 2, wherein the control means is further configured to control the steam generating means to be turned off during the cooking operating phase, or to control the operating power of the steam generating means to be less than during the oxygen-discharging operating phase.

16. A steam cooking apparatus as claimed in any one of claims 1 to 15, wherein the steam cooking apparatus comprises a steamer, a steamer-toaster, a micro-steamer or a micro-steamer-toaster.