WO2023284849A1

WO2023284849A1 - Steamer cooking apparatus

Info

Publication number: WO2023284849A1
Application number: PCT/CN2022/105883
Authority: WO
Inventors: 石柱; 林晨; 刘和成; 张红帅; 司鹏
Original assignee: 广东美的白色家电技术创新中心有限公司; 美的集团股份有限公司
Priority date: 2021-07-16
Filing date: 2022-07-15
Publication date: 2023-01-19
Also published as: CN115606991A

Abstract

A steamer cooking apparatus (200), which relates to the technical field of kitchen appliances. The steamer cooking apparatus (200) comprises: a box body (210), which comprises a cooking cavity (212), the cooking cavity (212) being provided with air holes (2120); an oxygen exhaust device, which is configured to exhaust oxygen within the cooking cavity (212) through the air holes (2120); a steam spraying device (230), which is configured to spray steam (500) into the cooking cavity (212); and a control device (250), which is configured to control the steam spraying device (230) to start after the operation of the oxygen exhaust device is finished. The steamer cooking apparatus (200) can satisfy health requirements for people's cooked food, and also has a high cooking efficiency.

Description

steam cooking equipment

Cross References to Related Applications

This application claims the priority of the invention patent application with the application number 202110808883.9 and the invention name "steam cooking equipment" submitted on July 16, 2021. The disclosure of the priority claimed by this application is incorporated herein by reference in its entirety.

technical field

The present disclosure relates to the technical field of kitchen appliances, in particular to a steam cooking device.

Background technique

With the development of the global economy and the improvement of living standards, people are paying more and more attention to food health indicators. Compared with traditional cooking methods such as frying and high-temperature baking, steam cooking is becoming more and more popular because of its cooking characteristics such as reducing fat and oil, and preserving nutrition.

However, during steam cooking, due to the presence of oxygen around the food, certain ingredients in the food react with oxygen and may produce harmful substances, such as heterocyclic amines. The study found that the amount of HCAs produced correlates with the amount of oxygen around the food during cooking.

At the same time, in urban life, people's work and life rhythms are getting faster and faster, and they are also very sensitive to cooking time. At present, the cooking speed of steam cooking equipment is still not ideal.

Contents of the invention

The present disclosure aims to solve at least one of the technical problems existing in the prior art. Therefore, the purpose of the present disclosure is to propose a steam cooking device, which can not only meet people's health needs for cooking food, but also has high cooking efficiency.

A steam cooking device according to an embodiment of the present disclosure, comprising: a box body including a cooking cavity, the cooking cavity has air holes; an oxygen exhaust device configured to discharge oxygen in the cooking cavity through the air holes; steam injection A device configured to inject steam into the cooking cavity; and a control device configured to control the steam injection device to start after the oxygen exhaust device finishes working.

According to the steam cooking equipment of the above-mentioned embodiments of the present disclosure, the oxygen in the cooking cavity can be exhausted as much as possible through the oxygen exhaust device first, so as to reduce the oxygen concentration in the cooking cavity, and then the high-speed steam injected by the steam injection device can Quickly surrounds and cooks food over heat. Since the oxygen concentration in the cooking chamber of the steam cooking device is low enough when cooking food, the harmful substances that may be produced by the reaction of oxygen and high-temperature food can be greatly reduced to meet people's health needs for cooking food. When cooking food, the steam is injected into the cooking cavity by spraying, so that the rapid heat exchange between the steam and the food can be realized, the cooking time of the food can be shortened, and thus the cooking efficiency can be improved.

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

According to the steam cooking device according to an embodiment of the present disclosure, the box body further includes a pressure cavity, and the pressure cavity is separated from the cooking cavity by an orifice plate, and the orifice plate includes a A plurality of through holes communicating with the cavity; the steam cooking device also includes: a steam generating device configured to deliver steam into the pressure chamber and/or deliver steam to the steam injection device; and a steam discharge device configured In order to transport the steam in the cooking cavity to the steam injection device; the steam cooking equipment includes an oxygen exhausting working stage and a cooking working stage located after the oxygen exhausting working stage, in the oxygen exhausting working stage, The control device controls the opening of the steam generating device and controls the closing of the steam discharge device, so that the oxygen in the cooking cavity is discharged through the air holes, and, in the cooking phase, the control device controls The steam discharge device is turned on so that steam is sprayed into the cooking cavity through the steam injection device.

Since the steam pressure in the pressure chamber is relatively high, it can enter into the cooking chamber with relatively low pressure through a plurality of through holes of the orifice plate, thereby exhausting as much oxygen in the cooking chamber as possible.

According to one embodiment of the present disclosure, in the steam cooking device, the air hole is located at the lower part 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 .

During the entire air discharge process, the gas density in the cooking cavity has a positive density gradient, which can minimize the mixing of steam and air, so as to discharge as much air as possible, that is, as much oxygen in the air as possible exhaust to minimize the reduction in oxygen concentration in the cooking chamber.

According to an embodiment of the present disclosure, in the steam cooking device, there are at least two steam injection devices, and the at least two steam injection devices are respectively arranged on two sides of the central area of the cooking cavity. The solution of this embodiment 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 device according to an embodiment of the present disclosure, the steam injection device includes: a central delivery pipe and an injection structure arranged along the extension direction of the central delivery pipe, wherein the delivery end of the central delivery pipe is closed, Moreover, the lumen cross-sectional area of the central delivery tube decreases gradually toward the delivery end. In this way, the flow velocity of the steam sprayed from the downstream of the central delivery pipe can be weakened to a certain extent, so that the flow velocity of the steam sprayed from the steam injection device is relatively uniform.

According to the steam cooking equipment of some embodiments of the present disclosure, the injection structure may be designed to: include a plurality of nozzles arranged along the extension direction of the central delivery pipe; or, the injection structure is set on the central delivery pipe The tube wall of the tube and the slit extending along the extension direction of the central delivery tube.

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

According to one embodiment of the present disclosure, in the steam cooking device, there are at least two steam discharge devices, each of which is connected to one or more steam injection devices. The steam is delivered to the aforementioned at least two steam injection devices through at least two steam discharge devices, which can improve the recycling efficiency of the steam in the cooking cavity, keep the steam in the cooking cavity at a high flow rate, thereby shortening the food cooking time and improving the cooking time. Cooking efficiency.

The steam cooking device according to an embodiment of the present disclosure further includes: a heating device, the steam provided between the steam discharge device, the steam injection device, and the steam discharge device and the steam injection device at least one of the delivery paths.

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

According to the above embodiments, when the steam cooking equipment cooks food, the steam is heated by the heating device and then sprayed into the cooking cavity by the steam injection device, which can further increase the temperature of the steam in the cooking cavity, thereby further improving the cooking efficiency.

According to one embodiment of the present disclosure, in the steam cooking device, there are at least two steam inlets in the pressure chamber, and the steam generating device sends steam to the at least two steam inlets in the pressure chamber through a branch pipeline. In this way, the steam can be quickly and evenly filled in the pressure chamber, and the working efficiency of the steam cooking equipment can be improved.

According to the steam cooking device according to an embodiment of the present disclosure, the time interval between the oxygen exhausting working phase and the cooking working phase is not less than zero. For example, the time interval can be zero or close to zero, which can further reduce the cooking time of the food.

According to the steam cooking device according to an embodiment of the present disclosure, the working duration of the steam cooking device in the oxygen-exhausting working stage is a first preset duration, and the working duration of the steam cooking device in the cooking working stage The duration is the second preset duration.

The steam cooking device according to an embodiment of the present disclosure further includes an oxygen concentration detection device configured to acquire the concentration of oxygen in the cooking cavity; the control device is further configured to respond to the concentration of oxygen in the cooking cavity is higher than the concentration threshold, controlling to turn on the oxygen exhausting working stage and closing the cooking working stage; Describe the cooking phases. In this embodiment, the elapsed time of the oxygen exhausting working phase is determined by the actual concentration of oxygen in the cooking cavity. Therefore, the concentration of oxygen in the cooking cavity can be controlled more precisely, so as to achieve more sufficient oxygen exhausting.

According to the steam cooking device according to an embodiment of the present disclosure, the control device is further configured to, in the cooking phase, control the steam generating device to be turned off, or control the working power of the steam generating device to be less than that in the cooking phase. The working power of the oxygen exhausting working stage. Since the steam can be recycled through the steam discharge device during the cooking phase, and the concentration of 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 appropriately reduced during the cooking phase. In order to reduce the energy consumption of the equipment.

According to a steam cooking device according to an embodiment of the present disclosure, the steam cooking device includes a steam box, an integrated steam and oven, an integrated micro steamer or an integrated micro steam and oven.

Description of drawings

In the drawings, unless otherwise specified, the same reference numerals designate the same or similar parts or elements throughout the several drawings. The drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed according to the application, and should not be regarded as limiting the scope of the application.

Fig. 1 shows a schematic structural view of a steam cooking device in the related art;

Fig. 2 shows a front view of a steam cooking device according to some exemplary embodiments of the present disclosure;

Fig. 3 shows a front view of a steam cooking device working in an oxygen exhausting working stage according to some exemplary embodiments of the present disclosure;

Fig. 4A shows a steam cooking device according to some exemplary embodiments of the present disclosure, a simulation diagram of the concentration distribution of steam at several different moments after entering the cooking cavity;

Fig. 4B shows a simulation diagram of the concentration distribution of steam at several different moments after entering the cooking cavity according to a steam cooking device in the related art;

Fig. 5 shows a front view of a steam cooking device working in a cooking phase according to some exemplary embodiments of the present disclosure;

Fig. 6 shows a simulation nephogram of the steam velocity along the longitudinal section inside the cooking cavity when the steam cooking device is working in the cooking phase according to some exemplary embodiments of the present disclosure;

Fig. 7 shows a schematic perspective view of a cabinet of a steam cooking device according to some exemplary embodiments of the present disclosure;

Fig. 8 shows a perspective view of a cabinet, a steam injection device and a steam discharge device of a steam cooking device according to some exemplary embodiments of the present disclosure;

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

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

Fig. 11 shows a steam-type cooking device according to some exemplary embodiments of the present disclosure, and a simulated nephogram of the velocity of steam ejected from a steam injection device;

Fig. 12 shows a perspective view of a steam injection device of a steam cooking device according to some exemplary embodiments of the present disclosure;

Fig. 13 shows a perspective view of a steam injection device of a steam cooking device according to some exemplary embodiments of the present disclosure;

Figure 14 shows a front view of a steam cooking device according to some exemplary embodiments of the present disclosure; and

Fig. 15 shows a front view of a steam cooking device according to some exemplary embodiments of the present disclosure.

Explanation of reference signs:

Among related technologies:

100-steam cooking equipment; 101-cooking cavity; 102-water box; 103-heater; 104-support.

In the embodiment of this disclosure:

200-steam cooking equipment; 210-box; 220-steam generating device; 260-branch pipeline;

230-steam injection device; 240-steam discharge device; 250-control device; 270-shell; 211-orifice plate;

2110-through hole; 2110a-first through hole; 2110b-second through hole; 211a-first region; 211b-second region;

212-cooking chamber; 213-pressure chamber; 2130-steam inlet; 2120-air hole; 212a-left side wall; 212b-right side wall;

212c-back side wall; 212d-bottom wall; 212e-top wall; 2301-center delivery tube; 2302-spray structure;

280-oxygen concentration detection device; 2121-grid hole; 2401-impeller; 2402-volute; 2403-inlet side;

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

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

detailed description

In the following, only some exemplary embodiments are briefly described. As those skilled in the art would realize, 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 descriptions are to be regarded as illustrative in nature and not restrictive.

As shown in FIG. 1 , a steam cooking device 100 in the related art has a water box 102 provided at the bottom of a cooking chamber 101 , and a heater 103 is provided in the water box 102 . When the steam cooking device 100 is working, the heater 103 heats the water in the water box 102 to convert it into high-temperature water vapor and diffuse in the cooking cavity 101 , thereby heating the food on the support 104 .

As described in the foregoing background art, during the working process of the steam cooking device 100, not only steam permeates around the food, but also a large amount of oxygen exists. Oxygen reacts with certain components in high-temperature food, which may produce some harmful substances that are harmful to human health. The health and safety of food cooked by this type of steam cooking device 100 has attracted more and more attention.

The inventors of the present disclosure are also concerned that in the steam cooking device 100 in the related art, after the steam enters the cooking chamber 101, the flow rate is not only low, but also the flow direction is irregular, which leads to low heating efficiency of food, and the whole cooking The process takes a long time. For example, steaming eggs generally takes 20 minutes or more, which obviously cannot meet the cooking needs of some fast-paced people.

In order to solve the above technical problems, the embodiments of the present disclosure provide a steam cooking device, which not only can meet people's health needs 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 a built-in steam cooking device that can be embedded in a wall or under a table, which is not specifically limited in the present disclosure.

The core function of the steam cooking device includes at least steaming, and in addition, it may also include one or more of functions such as microwave, grill, microwave steam, microwave oven, and steam oven. The specific product type of the steam cooking equipment is not limited, for example, it may be a steamer, an integrated steamer and oven, an integrated micro-steamer, an integrated micro-steamer and oven, and so on.

After the steam cooking device provided by the embodiment of the present disclosure starts steam cooking, the working process includes the following two working stages:

1. Oxygen exhaust work stage. In this oxygen exhausting working stage, the oxygen in the cooking cavity is exhausted as much as possible, so as to reduce the oxygen concentration in the cooking cavity. Since oxygen exists in the air, the purpose of deoxygenation can be achieved by discharging the air in the cooking cavity, and the oxygen depletion working stage is also the working stage of discharging air.

Second, the cooking stage. In this cooking stage, the food is heated and cooked by jetting high-speed steam to quickly surround the food. Since the concentration of oxygen in the cooking chamber is low enough in this cooking stage, the harmful substances that may be produced by the reaction of oxygen and high-temperature food can be greatly reduced, thereby ensuring the health and nutrition of the food. In addition, filling the cooking cavity with steam by spraying can realize rapid heat exchange between the steam and the food, and shorten the cooking time of the food.

The main structure of the steam cooking equipment includes a box body, an oxygen exhaust device and a steam injection device, wherein the box body includes a cooking cavity, the cooking cavity has air holes, the oxygen exhaust device is configured to discharge the oxygen in the cooking cavity through the air holes, and the steam injection device is configured To inject steam into the cooking cabinet. The specific type of the oxygen exhaust device is not limited, for example, it can be a vacuum exhaust device based on vacuuming to achieve oxygen exhaust, or it can be designed based on the specific structure of the box to achieve oxygen exhaust based on the pressure difference of the gas. The setting position of the air hole of the cooking cavity is not limited. For example, when the oxygen exhaust device realizes oxygen exhaust based on vacuuming, the air hole can be arranged 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 deoxygenation working phase and the cooking working phase is not less than zero. For example, the time interval can be zero or close to zero, so that the steam cooking device can quickly enter the cooking working phase after the oxygen exhausting working phase ends. When the steam cooking equipment is working, its control device (such as a microprocessor) automatically switches between the oxygen exhausting working phase and the cooking working phase according to the set control logic, so as to further shorten the cooking time of food.

In some embodiments, the box body further includes a pressure cavity, and the pressure cavity and the cooking cavity are separated by an orifice plate, and the orifice plate includes a plurality of through holes communicating the pressure cavity and the cooking cavity. The steam cooking equipment also includes a steam generating device, a steam discharging device and a control device, wherein the steam generating device is configured to deliver steam into the pressure chamber and/or deliver steam to the steam injection device, and the steam discharging device is configured to turn the cooking cavity The steam inside is transported to the steam injection device. During the oxygen exhausting working stage, the control device controls the opening of the steam generating device and the closing of the steam discharging device, so that the oxygen in the cooking cavity is discharged through the air holes, and, during the cooking working stage, the control device Control the opening of the steam discharge device, so that the steam is sprayed into the cooking cavity through the steam injection device.

Since the steam pressure in the pressure chamber is relatively high, it can enter into the cooking chamber with relatively low pressure through a plurality of through holes of the orifice plate, thereby exhausting as much oxygen in the cooking chamber as possible. Wherein, the relative positions of the cooking cavity and the pressure cavity are not limited. The design of the oxygen exhaust device in this embodiment is based on the pressure difference of the gas to achieve oxygen exhaust through the specific structural design of the box (such as pressure chamber, orifice plate, air hole, etc.).

As shown in FIG. 2 , it is a front view of a steam cooking device 200 according to some exemplary embodiments of the present disclosure. The steam cooking device 200 mainly includes a box body 210 , a steam generating device 220 , a steam injection device 230 , a steam exhausting device 240 and a control device 250 . In this embodiment, the steam cooking device 200 is a front-opening steam cooking device, and the box 210 is the main body of the steam cooking device 200 and is located in the casing 270 .

In the embodiments of the present disclosure, descriptions about orientations such as up, down, left, right, top, bottom, front, back, etc., all refer to the normal placement state of the steam cooking device 200, for example, to define the device or its components The side closer to the operator is the front side, and the side farther away from the operator is the back side. Define the side of the equipment or its components on the left hand side of the operator as the left side, and the side on the right hand side of the operator as Right, wait.

As shown in FIG. 2 , the box body 210 includes a cooking cavity 212 and a pressure cavity 213 separated by an orifice plate 211 . A support (not shown in the figure) and/or a tray 290 and other cooking aids for carrying the food 300 may be arranged in the cooking cavity 212 . The bottom of the cooking cavity 212 has an air hole 2120 for discharging oxygen (that is, an air hole for discharging air), and the air hole 2120 can be located at the bottom wall of the cooking cavity 212 or one of the side walls, such as the back side wall as shown in the figure 212c.

The pressure chamber 213 is located above the cooking chamber 212, and the steam generated by the steam generating device 220 is transported to the pressure chamber 213 (such as the branch pipeline 260 shown in the figure). The orifice plate 211 includes a plurality of through holes 2110 communicating the pressure cavity 213 with the cooking cavity 212 , so that the steam in the pressure cavity 213 can enter the relatively low pressure cooking cavity 212 . 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 shape of the cooking chamber 212 is substantially cuboid, including the left side wall 212a shown in the figure, the right side wall 212b, the back side wall 212c, the bottom wall 212d and the bottom wall formed by the lower surface of the orifice plate 211. Top wall 212e. When the front door of the steam cooking device 200 is closed, the inner side wall of the front door serves as the front side wall of the cooking cavity 212 . In the embodiment of the present disclosure, the box body 210 is, for example, a sheet metal box body.

Both the steam injection device 230 and the steam discharge device 240 are turned on during the cooking session. The steam discharge device 240 , such as a centrifugal fan or other negative pressure devices, is used to transport the steam in 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 a spraying manner, so that the steam quickly surrounds the food 300 on the cooking aid, thereby heating and cooking the food 300 .

The control device 250 is used to realize the automatic control of the steam cooking equipment 200, so as to realize the automatic switching from the oxygen exhausting working stage to the cooking working stage. The steam discharge device 240 is closed, and, in the cooking phase, the control device 250 controls the steam discharge device 240 to open, and can also control the steam generating device 220 to open simultaneously. It can be understood that in FIG. 2 , the installation positions of the steam generating device 220 and the control device 250 in the steam cooking device 200 are only schematic, and do not represent their actual installation positions. The specific installation positions can be flexibly designed according to requirements.

The working process and working principle of the steam cooking device 200 in the embodiment of the present disclosure will be described in detail below.

As shown in FIG. 3 , the steam 500 generated by the steam generating device 220 can enter the pressure chamber 213 and enter the cooking chamber 212 through a plurality of through holes 2110 on the orifice plate 211 during the oxygen exhausting working phase.

The inventors of the present disclosure found in the process of implementing the embodiments of the present disclosure that when steam enters the cooking cavity 212, the temperature of the air inside is close to the temperature of the external environment, and the density is about 1.2kg/m ³ , while the density of the steam is about It is 0.6kg/m ³ . The difference in density between the steam and the air makes the steam that has just entered the cooking chamber 212 first float on the top area of the cooking chamber 212, and as the steam 500 continues to enter, the steam 500 will push the air 400 downwards, thereby forcing the air 400 to gradually It is discharged from the air hole 2120 at the bottom of the cooking cavity 212. During the entire process of air discharge, the gas density in the cooking chamber 212 presents a positive density gradient, that is, the density of the gas increases in a gradient from top to bottom, which can minimize the mixing of steam and air, thereby as much as possible Exhaust, that is, exhaust the oxygen in the air as much as possible, so that the oxygen concentration in the cooking cavity 212 is reduced to the minimum.

Fig. 4A is a simulation diagram of concentration distribution of steam at several different moments after entering the cooking chamber in some embodiments of the present disclosure. It can be understood that in the cooking cavity, the greater the concentration of steam, the smaller the concentration of air, and the smaller the concentration of oxygen in the air. As shown in Figure 4A, during the oxygen exhaust process, the concentration stratification of steam and air is clearly visible, and the interface between the two is pushed down over time like a piston until the air is fully exhausted. FIG. 4B is a simulated graph of steam concentration distribution obtained by the inventors of the present disclosure using a steam cooking device in the related art as a comparison example under the same time parameters. It can be seen that during the working process of the steam cooking equipment, the concentration of air in the cooking cavity is relatively high, and the concentration of steam is obviously smaller than that in Fig. 4A, and the distribution of steam is not uniform enough, and the steam in the central area of the cooking cavity On the contrary, the concentration is lower than that of the surrounding area.

Therefore, the steam cooking device 200 provided by the embodiment of the present disclosure can greatly reduce the oxygen content in the cooking cavity 212 , thereby reducing the generation of harmful substances from the reaction between oxygen and high-temperature food, and meeting people's health needs for cooking food.

As shown in FIG. 5 , the steam exhausting device 240 enters into the cooking working phase after the deoxygenating working phase ends. In this cooking phase, the steam delivery device 240 transports the steam 500 in the cooking cavity 212 to the steam injection device 230, so that the steam injection device 230 injects the steam 500 into the cooking cavity 212; meanwhile, the steam generating device 220 can also Continue to add steam 500 to the cooking chamber 212 through the pressure chamber 213 . Since the steam is injected into the cooking cavity 212 in the form of injection, the flow rate of the steam is greatly improved compared with the above-mentioned related technologies, and the high-speed flowing steam can quickly surround the food on the cooking aid, thereby achieving the effect of strengthening heat exchange, making the food The cooking time is greatly reduced.

As shown in FIG. 6 , in some embodiments of the present disclosure, the steam velocity simulation nephogram along the longitudinal section inside the cooking cavity 212 in the cooking working stage is shown. It can be seen from the figure that when the steam with a higher flow rate reaches the cooking aids such as trays, it will collide with the cooking aids, and then be changed direction by the surface of the cooking aids and quickly spread along the surface of the cooking aids. Thereby, the food on the cooking aid is surrounded as a whole. In addition, it can also be seen from the figure that the steam with a higher flow rate is mainly concentrated above the cooking aids, that is, it is mainly concentrated in the area where the food is placed. In this way, the temperature of the steam in the area where the food is placed is higher than that in other areas. It can quickly exchange heat with food to achieve the purpose of shortening food cooking time and improving cooking efficiency.

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

In some embodiments of the present disclosure, the working time of the steam cooking device in the oxygen discharge working phase is a first preset time length, and the working time in the cooking working phase is a second preset time length. Wherein, the first preset duration can be set before the device leaves the factory, and the second preset duration can be set according to the specific function design of the steam cooking device, either before the device leaves the factory, or by the user according to cooking needs. For example, in one embodiment, the user chooses to start the egg steaming function of the steam cooking device. The first preset time length is 1 minute, and the second preset time length is 9 minutes. The oxygen concentration is low enough, and after the second preset period of time in the cooking stage, the steam ejected by the steam injection device can quickly steam the eggs.

In other embodiments of the present disclosure, as shown in FIG. 2 , the steam cooking device 200 further includes an oxygen concentration detection device 280 for obtaining the oxygen concentration in the cooking cavity 212, and the probe of the oxygen concentration detection device 280 is exposed in the cooking cavity. 212, for example, is set at the bottom of the cooking cavity 212. The aforementioned control device 250 is also configured to, in response to the concentration of oxygen being higher than the concentration threshold, control the opening of the oxygen exhausting working phase and the closing of the cooking working phase, in this embodiment, that is, control the opening of the steam generating device 220 and control the steam discharge The device 240 is closed; and, in response to the concentration of oxygen being not higher than the concentration threshold, the control closes the oxygen exhausting working phase and opens the cooking working phase, in this embodiment, that is, controlling the opening of the steam discharge device 240, and the steam generating device 220 also can be turned on together.

In this embodiment, the duration of the oxygen exhausting working phase is determined by the actual concentration of oxygen in the cooking cavity 212 , therefore, the concentration of oxygen in the cooking cavity 212 can be controlled more precisely, so as to achieve more sufficient oxygen exhausting.

In some embodiments of the present disclosure, the control device 250 is further configured to control the steam generating device 220 to shut down or control the working power of the steam generating device 220 to be smaller than that in the oxygen exhausting working phase during the cooking working phase. Since the steam can be recycled through the steam discharge device 240 during the cooking phase, and, as mentioned above, the concentration of the steam in the cooking cavity 212 is relatively high, therefore, the steam generating device 220 can be closed during the cooking phase, or Properly reduce the working power of the steam generating device 220 to reduce the energy consumption of the equipment.

The structural design of the steam cooking device 200 in some embodiments of the present disclosure will be further described in detail below.

As shown in FIG. 2 and FIG. 7 , in these embodiments, there are two steam inlets 2130 of the pressure chamber 213 , which are located on the left and right sides of the steam cooking device 200 . The steam generating device 220 simultaneously delivers steam to the two steam inlets 2130 through the branch pipeline 260 , so that the steam can fill the pressure chamber 213 quickly and evenly. Of course, the number of steam inlets 2130 is not limited to two, for example, there may be one or more than two. The present disclosure does not specifically limit the location of the steam inlet 2130 , which can be designed with reference to the design location of the steam generator.

As shown in FIG. 8, in some embodiments of the present disclosure, the orifice 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 second regions located in the first region 211a. A through hole 2110a 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 the arrangement density of the second through holes 2110b. In the pressure chamber 213, the steam first reaches the top of the second area 211b, and the tangential flow velocity in the second area 211b (that is, the velocity along the tangential direction of the orifice 211) is relatively high, and the pressure is low, and then reaches the first area Above 211a and in this first region 211a the tangential flow velocity decreases and the pressure increases. In this embodiment, the plurality of through holes 2110 adopt a design with a dense center and a 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 difference in steam pressure and facilitating the uniformity of the steam. released to the cooking cavity 212.

In another embodiment of the present disclosure, the design for a plurality of through holes may also be that the arrangement density of the first through holes and the second through holes are approximately the same, but the diameter of the first through holes is larger than that of the second through holes. Aperture, this embodiment can also obtain similar technical effects based on the above principles. In yet another embodiment of the present disclosure, the above-mentioned density design and pore size difference design for multiple through holes may also be used in combination, so as to achieve similar technical effects.

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

As shown in FIG. 2 , when using the steam cooking device 200 , the food 300 is usually placed in the central area of the cooking cavity 212 , that is, directly above the middle of the bottom wall 212 d of the cooking cavity 212 . As shown in Figures 5 and 9, in the disclosed embodiment, the number of steam injection devices 230 is two, and the two steam injection devices 230 are symmetrically arranged on both sides of the central area of the cooking cavity 212, and symmetrically directed towards the cooking chamber. The steam 500 sprayed from the central area of the cavity 212 can make the steam around the food 300 more uniform, thereby further improving the heating efficiency of the food 300 . In other embodiments of the present disclosure, there may be more than two steam injection devices, and they are distributed on both sides of the central area of the cooking chamber.

As shown in FIG. 10 , in these embodiments, the steam ejection device 240 is a centrifugal fan, the number is also two, and the two steam injection devices 230 are provided in one-to-one correspondence. That is, each steam delivery device 240 is configured to deliver the steam 500 in the cooking cavity to a corresponding one of the steam injection devices 230 . The steam 500 is transported to the two steam injection devices 230 in one-to-one correspondence through the two steam discharge devices 240, which can improve the recycling efficiency of the steam in the cooking cavity, keep the steam in the cooking cavity at a high flow rate, and shorten the cooking time of the food. Cooking time, improve cooking efficiency.

The present disclosure does not limit the specific quantity of the steam injection device and the steam discharge device. For example, the number of the steam discharge device may also be one, and the steam is delivered to the two steam injection devices simultaneously through a specially designed branch pipeline. For example, there can also be one steam injection device, which is arranged on the top of the cooking cavity near the back side wall. In some embodiments, there are at least two steam discharge devices, and each steam discharge device is connected to one or more steam injection devices, so as to deliver steam to the one or more steam injection devices.

As shown in Figures 9 and 10, the steam exhausting device 240 is a centrifugal fan located outside the back side wall 212c of the cooking cavity 212, and the back side wall 212c of the cooking cavity 212 has a A plurality of grid holes 2121 (in FIG. 9 , the steam exhausting device 240 is blocked by the plurality of grid holes 2121 , so it is only shown by a dotted line). The centrifugal fan uses the high-speed rotating impeller 2401 to accelerate the steam 500, then decelerates, changes the flow direction, and converts kinetic energy into potential energy (ie, the pressure of the gas). As shown in FIG. 10 , the centrifugal fan includes a volute 2402 and an impeller 2401 inside the volute 2402 . The steam 500 enters the volute 2402 axially from the air inlet side 2403 of the centrifugal fan, changes the flow direction to the radial direction after the action of the impeller 2401 , then is discharged from the air outlet 2404 of the volute 2402 , and then enters the steam injection device 230 . In some embodiments of the present disclosure, the air outlet 2404 of the volute 2402 communicates with the steam inlet of the steam injection device 230 .

As shown in FIG. 10 , the volute 2402 of the centrifugal fan is further provided with a heating device 2405 for reheating the steam 500 entering the volute 2402 . The specific type and structure of the heating device 2405 are not limited, for example, as shown in the figure, it may be a ring-shaped heating pipe surrounding the impeller 2401 . The steam 500 is heated by the heating device 2405 in the volute 2402 and then injected into the cooking chamber through the steam injection device 230, which can further increase the temperature of the steam in the cooking chamber, thereby further improving the cooking efficiency.

In other embodiments of the present disclosure, the heating device may also be provided in 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 delivery pipe 2301 and an injection structure 2302 arranged along the extension direction of the central delivery pipe 2301, wherein the delivery end of the central delivery pipe 2301 ( That is, the end of the central delivery pipe 2301 along the delivery direction of the steam 500, the delivery direction of the steam 500 in the central delivery pipe 2301 is closed as shown by the dotted arrow), and the lumen cross-sectional area of the central delivery pipe 2301 is along the direction towards the delivery end. The direction is decreasing. The specific shape of the central delivery tube 2301 is not limited, for example, the cross-sectional shape of its lumen can be circular, rectangular or trapezoidal and so on. For example, the central conveying pipe 2301 shown in FIG. 10 has a shape characteristic of being wide first and then narrow along the conveying direction of the steam 500 .

In the embodiment shown in FIG. 10 , the injection structure 2302 includes a plurality of nozzles 2302 a arranged along the extension direction of the central delivery pipe 2301 , so that the steam 500 is ejected from the plurality of nozzles 2302 a respectively.

The inventors of the present disclosure found in the process of implementing the embodiments of the present disclosure that if the lumen cross-sectional area of the central delivery pipe 2301 is constant, according to Bernoulli's principle, then the steam flow field is downstream (that is, the central delivery pipe 2301 The position closer to the delivery end of the central delivery pipe 2301 in the extension direction of the central delivery pipe 2301) is bound to have a higher pressure, so that the flow rate of the steam ejected from the downstream of the central delivery pipe 2301 is higher. In the embodiment of the present disclosure, the lumen cross-sectional area of the central delivery pipe 2301 decreases gradually along the direction toward the delivery end, so that the flow velocity of the steam ejected from the downstream of the central delivery pipe 2301 can be weakened to a certain extent, so that, from The flow velocity of the steam 500 sprayed out by the steam injection device 230 is relatively uniform.

As shown in FIG. 11 , it is a simulation cloud diagram of the velocity of steam ejected from the steam injection device 230 of the embodiment shown in FIG. 10 . It can be seen that, with the steam injection device 230 designed above, the steam can be injected into the cooking chamber at a relatively uniform flow rate along the direction perpendicular to the central delivery pipe 2301, thereby achieving uniform and rapid heating of the food.

Spray configuration 2302 is not limited to the design employing nozzle 2302a described above. As shown in FIG. 12 , in other embodiments of the present disclosure, the injection structure 2302 can also be a louver, and a plurality of blades 2302b of the louver extend along the extension direction of the central delivery pipe 2301, so that the steam 500 flows from between adjacent blades 2302b. Squirt out from the gaps in between. As shown in FIG. 13 , in some other embodiments of the present disclosure, the injection structure 2302 can also be a slit 2302c opened on the wall of the central delivery pipe 2301 , so that the steam 500 can be sprayed out from the slit 2302c.

The present disclosure does not limit the specific installation positions of the steam injection device 230 and the steam discharge device 240 . The two steam injection devices 230 can be arranged on the top of the cooking chamber, and can also be arranged on the peripheral side of the cooking chamber. The steam exhausting device 240 can be arranged on the back side of the cooking cavity, or on the left side wall or the right side wall of the cooking cavity.

As shown in Figure 2 and Figure 8, in these embodiments, two steam discharge devices 240 are arranged on the outside of the back side wall 212c of the cooking cavity 212, wherein a steam injection device 230 is fixedly arranged on the top wall 212e and the left side. In the edge area adjacent to the side wall 212a, another steam injection device 230 is fixedly arranged on the edge area of the top wall 212e adjacent to the right side wall 212b. The two steam injection devices 230 are arranged oppositely and inject steam toward the central area of the cooking cavity 212 in an obliquely downward direction.

As shown in FIG. 14 , in some other embodiments of the present disclosure, two steam discharge devices 240 are arranged on the outside of the back side wall 212c of the cooking chamber 212, and one steam injection device 230 is fixedly arranged on the left side wall 212a. In the edge area adjacent to the top wall 212e, another steam injection device 230 is fixedly arranged on the edge area of the right side wall 212b adjacent to the top wall 212e. The two steam injection devices 230 are arranged oppositely and inject steam toward the central area of the cooking cavity 212 in an obliquely downward direction.

As shown in FIG. 15 , in some other embodiments of the present disclosure, two steam discharge devices 240 are arranged on the outside of the back side wall 212c of the cooking cavity 212, and one steam injection device 230 is fixedly arranged on the back side wall 212c. In the edge region adjacent to the left side wall 212a, a further steam injection device 230 is fixedly arranged in the edge region of the rear side wall 212c adjacent to the right side wall 212b. The two steam injection devices 230 inject steam toward the central area of the cooking cavity 212 at the same time. The two steam injection devices 230 are, for example, louver-type steam injection devices shown in FIG. 12 .

To sum up, the steam cooking equipment provided by the embodiments of the present disclosure can effectively shorten the cooking time of food and improve the cooking efficiency under the premise of satisfying people's health needs for cooking food.

It should be understood that in this specification the terms "central", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear" , "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", " The orientation or positional relationship or size indicated by "radial direction", "circumferential direction" and so on are based on the orientation or positional relationship or size shown in the drawings, and these terms are used only for the convenience of description, not to indicate or imply the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limiting the scope of the application.

In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only, and should not be interpreted as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first", "second" and "third" may explicitly or implicitly include one or more of these features. In the description of the present application, "plurality" means two or more, unless otherwise specifically defined.

In this application, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it may be a fixed connection or a detachable connection, unless otherwise clearly specified and limited. , or integrated; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components . Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In this application, unless otherwise expressly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

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

Claims

A steam cooking device comprising:

The box body includes a cooking cavity, and the cooking cavity has air holes;

an oxygen discharge device configured to discharge oxygen in the cooking cavity through the air holes;

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

A control device configured to control the steam injection device to start after the oxygen exhaust device finishes working.
The steam cooking device according to claim 1, wherein,

The box body also includes a pressure cavity, the pressure cavity is separated from the cooking cavity by an orifice plate, and the orifice plate includes a plurality of through holes communicating the pressure cavity with the cooking cavity;

The steam cooking device also includes:

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

a steam delivery device configured to deliver the steam in the cooking cavity to the steam injection device;

The working process of the steam cooking equipment includes an oxygen exhausting working stage and a cooking working stage after the oxygen exhausting working stage. In the oxygen exhausting working stage, the control device controls the opening of the steam generating device and controls all The steam discharge device is closed, so that the oxygen in the cooking cavity is discharged through the air hole, and, in the cooking working stage, the control device controls the steam discharge device to be opened, so that the steam passes through the The steam injection device injects into the cooking cavity.
The steam cooking device according to claim 2, wherein,

The air hole is located at the lower part 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.
The steam cooking device according to claim 1, wherein,

There are at least two steam injection devices, and the at least two steam injection devices are respectively arranged on both sides of the central area of the cooking cavity.
The steam cooking device according to claim 4, wherein,

The steam injection device includes: a central delivery pipe and an injection structure arranged along the extension direction of the central delivery pipe, wherein the delivery end of the central delivery pipe is closed, and the lumen cross-sectional area of the central delivery pipe is Decreases in the direction towards the delivery end.
The steam cooking device according to claim 5, wherein,

The spray structure includes a plurality of nozzles arranged along the extension direction of the central delivery pipe; or

The injection structure is a slit opened on the pipe wall of the central conveying pipe and extending along the extending direction of the central conveying pipe.
The steam cooking device according to claim 4, wherein,

at least two of said steam injection devices are located on top of said cooking chamber; or

At least two of the steam injection devices are arranged on the peripheral side of the cooking cavity.
The steam cooking device according to claim 4, wherein,

There are at least two steam discharge devices, each of which is connected to one or more steam injection devices.
The steam cooking device according to claim 2, further comprising:

A heating device is provided in at least one of the steam discharge device, the steam injection device, and the steam delivery path between the steam discharge device and the steam injection device.
The steam cooking device according to claim 9, wherein,

The steam exhausting device is a centrifugal fan, and the heating device is annular and surrounds the impeller of the centrifugal fan.
The steam cooking device according to claim 2, wherein,

There are at least two steam inlets in the pressure chamber, and the steam generating device sends steam to at least two of the steam inlets in the pressure chamber through branch pipelines.
The steam cooking device according to claim 2, wherein,

The time interval between the deoxygenation working phase and the cooking working phase is not less than zero.
The steam cooking device according to claim 2, wherein,

The working duration of the steam cooking device in the oxygen-exhausting working phase is a first preset duration, and the working duration of the steam cooking device in the cooking working phase is a second preset duration.
The steam cooking device according to claim 2, further comprising:

an oxygen concentration detection device configured to acquire the concentration of oxygen in the cooking cavity;

The control device is further configured to, in response to the concentration of oxygen in the cooking cavity being higher than a concentration threshold, control the opening of the oxygen discharge working phase and the closing of the cooking working phase; and, in response to the concentration of oxygen in the cooking cavity When the concentration is not higher than the concentration threshold, the oxygen exhausting working stage is controlled to be closed and the cooking working stage is turned on.
The steam cooking device according to claim 2, wherein the control device is further configured to, in the cooking phase, control the steam generating device to be closed, or control the working power of the steam generating device to be less than The working power of the deoxygenation working phase is described.
The steam cooking device according to any one of claims 1 to 15, wherein the steam cooking device comprises a steam box, an integrated steam-oven machine, an integrated micro-steamer or an integrated micro-steamer-oven machine.