A large steam internal circulation method, system and steam oven

Abstract

The present application relates to the technical field of cooking utensils, and more particularly to a large-steam internal circulation method, system and steam oven, comprising the following steps: a first stage: controlling a first evaporator and a second evaporator to work until the cooking cavity is filled with saturated steam; a second stage: controlling the first evaporator and the second evaporator to work until the temperature in the cooking cavity is maintained in a set temperature range and the humidity in the cooking cavity is maintained in a set humidity range; and a third stage: controlling the first evaporator to stop working and the second evaporator to continuously work to evaporate the condensed water in the cooking cavity. The first stage is a temperature and humidity flushing stage, the second stage is a temperature and humidity stabilizing and maintaining stage, and the third stage is a water removing stage. Through the control of steam generation, steam recovery and condensed water treatment, the present application realizes large-steam and continuous steaming, and effectively improves cooking efficiency and cooking effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cooking appliances, and more particularly, to a large-steam internal circulation method, system and steam oven. BACKGROUND

[0002] With people's increasing demand for cooking, more and more steam ovens and ovens have entered the kitchens of ordinary families. However, if a steam oven and an oven are purchased at the same time, too much kitchen space will be occupied, so steam ovens with both steam oven functions and oven functions have appeared on the market. With the development of steam oven technology, steam ovens have expanded functions such as heating, thawing, baking, fermentation and grilling.

[0003] At present, most steam ovens only have a single evaporator, which is a hidden evaporator or an external evaporator. However, the single evaporator product has the following problems: 1. The water consumption is too large for continuous evaporation, and the water tank capacity is insufficient; 2. There is too much condensate water for continuous evaporation, and it is not convenient to clean; 3. Too much steam is discharged for continuous work, which can easily damage the installation cabinet. Therefore, the single evaporator product is difficult to realize continuous evaporation, resulting in insufficient steam. SUMMARY

[0004] The purpose of the present application is to solve the problem of insufficient steam caused by the difficulty of continuous evaporation of the single evaporator product in the prior art, and to provide a large-steam internal circulation method, system and steam oven, which can realize large-steam and continuous evaporation, and improve cooking efficiency and cooking effect.

[0005] To solve the above technical problems, the technical solution adopted by the present application is:

[0006] A large-steam internal circulation method is provided, comprising the following steps:

[0007] The first stage is to control the first evaporator to work continuously and the second evaporator to work until the cooking cavity is filled and saturated steam is reached;

[0008] The second stage is to control the first evaporator and the second evaporator to work until the temperature in the cooking cavity is maintained within a set temperature range and the humidity in the cooking cavity is maintained within a set humidity range;

[0009] The third stage is to control the first evaporator to stop working and the second evaporator to work continuously to evaporate the condensate water in the cooking cavity;

[0010] The first stage is a temperature and humidity flushing stage, the second stage is a stable temperature and humidity stage, and the third stage is a water removal stage.

[0011] The large-steam inner circulation method of the present application, in the first stage, the first evaporator continuously works to generate sufficient steam, part of the steam condenses in the cooking cavity to obtain condensed water, and the condensed water is used as part or all of the water source of the second evaporator; in the second stage, the first evaporator and the second evaporator work alternately and / or simultaneously; in the third stage, the second evaporator works to evaporate the continuously generated condensed water, reducing or avoiding the residue of the condensed water. By controlling the working of the first evaporator and the second evaporator, the present application ensures that there is always an evaporator working during the cooking process, and can realize large-steam and continuous steaming, improving the cooking efficiency and cooking effect.

[0012] Preferably, the water source of the first evaporator comes from the water tank, and the water source of the second evaporator comes from the condensed water in the cooking cavity and the water overflowing from the first evaporator into the second evaporator along the inner wall of the cooking cavity, and the process of the second stage is as follows:

[0013] The second stage: control the first evaporator to work for t1 time, stop for t2 time, and then work again and so on until T3 time and T4 time; control the second evaporator to continuously work until T3 time; then control the second evaporator to work for t4 time, stop for t5 time, and then work again and so on until T4 time.

[0014] The water source of the second evaporator comes from the condensed water, and this way is the cross double steaming way.

[0015] Preferably, the water source of the first evaporator comes from the water tank, and the water source of the second evaporator comes from the water tank and the condensed water in the cooking cavity, and the process of the second stage is as follows:

[0016] The second stage: control the first evaporator to work for t1 time, stop for t2 time, and then work again and so on until T3 time and T4 time; control the second evaporator to continuously work until T3 time; then control the second evaporator to work for t4 time, stop for t5 time, and then work again and so on until T4 time.

[0017] The water source of the second evaporator comes from the condensed water and the water tank, and this way is the independent double steaming way.

[0018] Preferably, the t1 time is the time period when the temperature of the first evaporator starts to work from below 90 degrees to stop at 120 degrees, the t2 time is the time period when the temperature of the first evaporator starts to work from above 120 degrees to drop to 90 degrees; the t4 time is the time period when the temperature of the second evaporator starts to work from below 90 degrees to stop at 120 degrees, and the t5 time is the time period when the temperature of the second evaporator starts to work from above 120 degrees to drop to 90 degrees. According to the temperature control of the start and stop of the first evaporator and the second evaporator in the second stage, the temperature and humidity in the cooking cavity are stabilized and maintained, the control is accurate, and the energy consumption can be saved.

[0019] Preferably, the method further comprises a step of assisting the temperature rising:

[0020] The first stage: starting the assisting temperature rising while the first evaporator and the second evaporator are working;

[0021] The second stage: closing the assisting temperature rising in the stable temperature and humidity stage, and starting the assisting temperature rising according to the temperature in the cooking cavity in the maintaining temperature and humidity stage;

[0022] The third stage: stopping the assisting temperature rising.

[0023] In the first stage, the temperature rising time is shortened and the cooking efficiency is improved by starting the first evaporator and the assisting temperature rising at the same time; in the second stage, the stable temperature and humidity stage is realized by only relying on the first evaporator and / or the second evaporator, and the assisting temperature rising is closed, which is beneficial to saving energy; in the maintaining temperature and humidity stage, if the temperature and humidity cannot be maintained by only relying on the first evaporator and the second evaporator, the assisting temperature rising is started or stopped according to the temperature in the cooking cavity, so that the temperature is effectively maintained; in the third stage, there is little residual condensed water, and the evaporation is completed by only using the second evaporator, so the assisting temperature rising is not needed to be started, and energy waste is avoided.

[0024] The application further provides a large-steam internal circulation system for realizing the large-steam internal circulation method, which comprises a controller, a first evaporator, a second evaporator, a condensing system, a water tank and a first water pump, the first evaporator, the second evaporator, the condensing system and the first water pump are connected with the controller, the first water pump is connected between the water tank and the first evaporator, the condensing system condenses water vapor in a cooking cavity into condensed water, and the condensed water flows to the second evaporator as a water source of the second evaporator.

[0025] In the first stage, the first evaporator is controlled to work continuously, the first evaporator continuously working generates sufficient steam, part of the steam is condensed into condensed water through the condensing system, and the condensed water is used as part or all of the water source of the second evaporator; in the second stage, the first evaporator and the second evaporator are controlled to work alternately and / or at the same time; in the third stage, the first evaporator is controlled to stop working, and the second evaporator works to evaporate the continuously generated condensed water, so as to reduce or avoid the residual condensed water. The application controls the working of the first evaporator and the second evaporator, ensures that there is always an evaporator working in the cooking process, realizes large-steam and continuous steaming, and improves the cooking efficiency and the cooking effect.

[0026] Further, a flow guide system is arranged in communication with the condensing system, and the flow guide system guides the condensed water to the inner wall of the cooking cavity.

[0027] Further, a second water pump is arranged between the water tank and the second evaporator.

[0028] Further, an auxiliary temperature rising system is arranged in communication with the controller.

[0029] The steam oven further comprises a cabinet, a cover, and the large steam inner circulation system as described above.

[0030] The steam oven of the present application can ensure that one of the evaporators is working at all times during the cooking process by controlling the working of the first and second evaporators.

[0031] Compared with the prior art, the steam oven of the present application has the following advantages:

[0032] The steam oven of the present application can ensure that one of the evaporators is working at all times during the cooking process by controlling the working of the first and second evaporators.

[0033] The application recovers the steam in the cooking cavity, reduces the water consumption caused by continuous operation, and reduces the steam discharge amount, thereby avoiding damage to the installation cabinet.

[0034] The application recovers the condensate water generated by continuous operation by setting the second evaporator, reduces or avoids the residue of the condensate water, and simplifies the cleaning process.

[0035] The application realizes large steam and continuous steaming by controlling the generation of steam, recovery of steam, and treatment of condensate water, thereby effectively improving the cooking efficiency and cooking effect. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a schematic diagram of the principle of the large steam internal circulation method of cross double steaming;

[0037] Figure 2 It is a schematic diagram of the principle of the large steam internal circulation method of independent double steaming;

[0038] Figure 3 It is a schematic diagram of the control principle of the large steam internal circulation system;

[0039] Figure 4 It is a schematic diagram of the structure of the large steam internal circulation system;

[0040] Figure 5 It is a schematic diagram of the structure of the second evaporator of the large steam internal circulation system from one perspective;

[0041] Figure 6 It is a schematic diagram of the structure of the second evaporator of the large steam internal circulation system from another perspective;

[0042] Figure 7 It is a schematic diagram of the structure of the condensing system of the large steam internal circulation system from one perspective;

[0043] Figure 8 It is a schematic diagram of the structure of the condensing system of the large steam internal circulation system from another perspective;

[0044] Figure 9 It is a schematic diagram of the structure of a flow guide system of the condensing system of the large steam internal circulation system;

[0045] Figure 10 It is a schematic diagram of the structure of another flow guide system of the condensing system of the large steam internal circulation system;

[0046] In the drawings: 100, controller; 200, first evaporator; 300, second evaporator; 310, water inlet; 320, lower concave cavity; 330, evaporation cavity; 340, heating pipe; 400, condensing system; 410, cross-flow fan; 420, air duct; 430, condensing box; 440, first through hole; 450, second through hole; 460, air outlet; 470, cooling water pipe; 500, water tank; 600, flow guide system; 610, water receiving tray; 611, first flow guide groove; 612, mounting portion; 613, second flow guide groove; 614, mounting plate; 615, support rod; 616, first clamping portion; 617, second clamping portion; 620, flow guide pipe; 700, box body; 800, cooking cavity; 900, heating pipe. DETAILED DESCRIPTION

[0047] The application will be further described below in conjunction with the specific embodiments. The drawings are only used for exemplary description, and the representation is only a schematic diagram, not a physical diagram, and should not be understood as a limitation on the patent. In order to better illustrate the embodiments of the application, some components in the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0048] The same or similar reference numerals in the drawings of the embodiments of the application correspond to the same or similar components; in the description of the application, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary description, and should not be understood as a limitation on the patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0049] Embodiment one

[0050] This embodiment is the first embodiment of the large steam internal circulation method, comprising the following steps:

[0051] First stage: control the first evaporator 200 to work, and the second evaporator 300 to work, until the temperature in the cooking cavity 800 reaches the set temperature value, and the humidity in the cooking cavity 800 reaches the set humidity value;

[0052] Second stage: control the first evaporator 200 and the second evaporator 300 to work, until the temperature in the cooking cavity 800 is maintained in the set temperature range, and the humidity in the cooking cavity 800 is maintained in the set humidity range;

[0053] The third stage is to control the first evaporator 200 to stop working and the second evaporator 300 to continuously work, so as to evaporate the condensed water in the cooking cavity 800.

[0054] The first stage is a rapid temperature and humidity flushing stage, the second stage is a stable temperature and humidity maintaining stage, and the third stage is a water removing stage.

[0055] Specifically, in the embodiment, the water source of the first evaporator 200 comes from the water tank 500, and the water source of the second evaporator 300 comes from the condensed water in the cooking cavity 800 and the water overflowing from the first evaporator 200 along the inner wall of the cooking cavity 800 into the second evaporator 300. Based on this, the specific steps of the method in the embodiment are as follows:

[0056] The first stage is to control the first evaporator 200 and the second evaporator 300 to work for T2 time, until the cooking cavity 800 is filled with saturated steam;

[0057] The second stage is to control the first evaporator 200 to work for t1 time, stop for t2 time, and then work again and so on until T3 time and T4 time; and to control the second evaporator 300 to continuously work until T3 time, and then control the second evaporator 300 to work for t4 time, stop for t5 time, and then work again and so on until T4 time;

[0058] The third stage is to control the first evaporator 200 to stop working and the second evaporator 300 to continuously work for T5 time, so as to evaporate the condensed water in the cooking cavity 800.

[0059] Before the first stage, there is a water pumping stage to pump the water in the water tank 500 into the first evaporator 200, and the water pumping process lasts for T1 time. To avoid the second evaporator 300 from being unable to start working for a long time, in the embodiment, since the second evaporator 300 is located at the bottom of the first evaporator 200, the water in the first evaporator 200 can be caused to overflow into the cooking cavity 800 and flow into the second evaporator 300 along the inner wall of the cooking cavity 800 by controlling the water pumping amount. In this way, in the first stage, the first evaporator 200 and the second evaporator 300 can work at the same time to achieve rapid temperature and humidity flushing. When the water is supplied to the second evaporator 300 in this overflow manner, after the water supply to the second evaporator 300 is completed, a part (for example, half) of the water in the first evaporator 200 is pumped out to the water tank 500, so as to ensure the safe working of the first evaporator 200.

[0060] In this embodiment, T1 is the time required to pump water into the first evaporator 200, T2 is the time required from the first evaporator 200 reaching the set water volume for the first time until the cooking chamber 800 is filled with saturated steam, T3 is the time required from the second evaporator 300 reaching the set water volume for the first time until the cooking chamber 800 is filled with saturated steam, T4 is the end time before the program ends, and T5 is the program end time.

[0061] In this embodiment, time t1 is the period from when the temperature of the first evaporator 200 starts working from below 90 degrees Celsius to when it stops at 120 degrees Celsius; time t2 is the period from when the temperature of the first evaporator 200 starts working from above 120 degrees Celsius to when it cools down to 90 degrees Celsius; time t4 is the period from when the temperature of the second evaporator 300 starts working from below 90 degrees Celsius to when it stops at 120 degrees Celsius; and time t5 is the period from when the temperature of the second evaporator 300 starts working from above 120 degrees Celsius to when it cools down to 90 degrees Celsius. This embodiment can detect the temperature inside the first evaporator 200 and the second evaporator 300 by installing temperature sensors inside them. During the stage of stabilizing and maintaining temperature and humidity, the start and stop of the first evaporator 200 and the second evaporator 300 are controlled according to the temperature, thus stabilizing and maintaining the temperature and humidity inside the cooking cavity 800. This provides accurate control and saves energy.

[0062] The specific implementation steps of this embodiment are as follows:

[0063] like Figure 1 As shown, in the first stage, the first evaporator 200 and the second evaporator 300 operate to generate sufficient steam. Part of the steam condenses within the cooking chamber 800 to form condensate, which serves as part or all of the water source for the second evaporator 300. In the second stage, the first evaporator 200 and the second evaporator 300 operate alternately and / or simultaneously. In the third stage, the second evaporator 300 evaporates the condensate generated during continuous operation, reducing or eliminating condensate residue. By controlling the operation of the first evaporator 200 and the second evaporator 300, ensuring that one evaporator is always working during cooking, large amounts of steam and continuous steaming can be achieved, improving cooking efficiency and results. This embodiment utilizes the cross-steaming of the first evaporator 200 and the second evaporator 300, achieving not only good large steam and continuous steaming capabilities but also simplifying the structure of the steam oven and reducing its manufacturing cost.

[0064] Example 2

[0065] The second embodiment of the large steam internal circulation method is similar to the first embodiment, except that the water source of the first evaporator 200 comes from the water tank 500, and the water source of the second evaporator 300 comes from the water tank 500 and the condensed water in the cooking cavity 800, as shown in Figure 2 Based on this, the specific steps of the method described in this embodiment are as follows:

[0066] The first stage: control the first evaporator 200 and the second evaporator 300 to work for T2 time, until the cooking cavity 800 is filled with saturated steam;

[0067] The second stage: control the first evaporator 200 to work for t1 time, stop for t2 time, and then work again and so on until T3 time and T4 time; control the second evaporator 300 to work continuously until T3 time; then control the second evaporator 300 to work for t4 time, stop for t5 time, and then work again and so on until T4 time;

[0068] The third stage: control the first evaporator 200 to stop working, and control the second evaporator 300 to work continuously for T5 time, to evaporate the condensed water in the cooking cavity 800.

[0069] Before the first stage, there is a water pumping stage, in which the water in the water tank 500 is pumped into the first evaporator 200, and the water in the water tank 500 is pumped into the second evaporator 300, and the water pumping process lasts for T1 time.

[0070] In this embodiment, T1 is a relatively large time required for pumping water into the first evaporator 200 and the second evaporator 300, T2 is a time required for the first evaporator 200 to reach the set water amount for the first time to the time when the cooking cavity 800 is filled with saturated steam, T3 is a time required for the second evaporator 300 to reach the set water amount for the first time to the time when the cooking cavity 800 is filled with saturated steam, and T4 is the time before the program is cut off, and T5 is the program cut-off time.

[0071] In addition, in the embodiment, the t1 time is a time period during which the temperature of the first evaporator 200 is from below 90 degrees to stop at 120 degrees, the t2 time is a time period during which the temperature of the first evaporator 200 is from above 120 degrees to drop to 90 degrees; the t4 time is a time period during which the temperature of the second evaporator 300 is from below 90 degrees to stop at 120 degrees, and the t5 time is a time period during which the temperature of the second evaporator 300 is from above 120 degrees to drop to 90 degrees. In the embodiment, the temperature sensor is arranged in the first evaporator 200 and the second evaporator 300 to detect the temperature in the first evaporator 200 and the second evaporator 300. In the stable temperature and humidity stage, the first evaporator 200 and the second evaporator 300 are controlled to start and stop in the second stage, the temperature and humidity in the cooking cavity 800 are stabilized and maintained, the control is accurate, and the energy consumption is saved.

[0072] The specific implementation steps of the embodiment are similar to those of the first embodiment, and the difference is that:

[0073] In the embodiment, the first evaporator 200 and the second evaporator 300 are independently double-steamed, and the first evaporator 200 and the second evaporator 300 are controlled independently, so that the effects of large steam and continuous steaming can be maximized.

[0074] Embodiment three

[0075] The third embodiment of the large-steam internal circulation method is similar to the first embodiment or the second embodiment, and the difference is that the embodiment further includes the step of assisting the temperature shock:

[0076] The first stage: the first evaporator 200 is continuously started while the auxiliary temperature shock is started;

[0077] The second stage: in the stable temperature and humidity stage, the auxiliary temperature shock is closed; in the temperature and humidity maintenance stage, it is judged whether to start the auxiliary temperature shock according to the temperature in the cooking cavity 800;

[0078] The third stage: the auxiliary temperature shock is stopped.

[0079] The specific implementation steps of the embodiment are similar to those of the second embodiment, and the difference is that:

[0080] In the first stage, simultaneously activating the first evaporator 200 and the auxiliary heating element shortens the heating time and improves cooking efficiency. In the second stage, a stable temperature and humidity can be achieved using only the first evaporator 200 and the second evaporator 300, so the auxiliary heating element is turned off to save energy. In the temperature and humidity maintenance stage, if the temperature and humidity cannot be maintained using only the first evaporator 200 and the second evaporator 300, the auxiliary heating element is activated based on the temperature inside the cooking cavity 800 to effectively maintain temperature stability. In the third stage, with less residual condensate, evaporation can be completed using only the second evaporator 300, so there is no need to activate the auxiliary heating element to avoid energy waste.

[0081] Example 4

[0082] This embodiment is a first embodiment of a large steam internal circulation system, used to implement the large steam internal circulation method described in Embodiment 1. It includes a controller 100, a first evaporator 200, a second evaporator 300, a condensing system 400, a water tank 500, and a first water pump. The first evaporator 200, the second evaporator 300, the condensing system 400, and the first water pump are all connected to the controller 100. The first water pump is connected between the water tank 500 and the first evaporator 200. The condensing system 400 condenses water vapor in the cooking chamber 800 into condensate, which flows to the second evaporator 300 as its water source. Figures 3-4 As shown. In this embodiment, the second evaporator 300 is fixedly installed at the bottom of the cooking cavity. The second evaporator 300 includes a water inlet 310, a recessed cavity 320, and an evaporation cavity 330 connected in sequence. A heating tube 340 with a shape similar to the outer edge of the evaporation cavity 330 is provided in the evaporation cavity 330. The design of the recessed cavity 320 facilitates the smooth and rapid entry of water from the water inlet 310 into the evaporation cavity 330. The heating tube 340 heats the water in the evaporation cavity 330 to form steam, such as... Figures 5-6 As shown; in this embodiment, a temperature sensor can be installed in the second evaporator 300 to determine whether there is water in the evaporation pan; a jump protector or a fuse protector can also be installed in the second evaporator 300 as a safety protection against overheating.

[0083] Specifically, the condensation system 400 includes a cross-flow fan 410, an air duct 420, and a condensation box 430. The condensation box 430 is connected above a portion of the air duct 420. The bottom plate of the condensation box 430 is obliquely upward along the steam flow direction. The cooking cavity 800 is connected to the condensation box 430 through a first through-hole 440. The condensation box 430 and the air duct 420 are connected through several parallel second through-holes 450. The air outlet 460 of the air duct 420 is located on the front panel of the steam oven, and the cross-flow fan 410 is located near the rear panel. Thus, the air duct 420 is distributed almost throughout the entire depth of the steam oven. Figure 7 ,8 As shown in the figure. Under the action of the cross-flow fan 410, the steam in the cooking cavity 800 enters the condensing box 430 through the first through hole 440, and is condensed into condensed water in the condensing box 430. The condensed water flows along the bottom plate of the condensing box 430 to the first through hole 440, and flows from the first through hole 440 into the cooking cavity 800. The cooled gas flows through the air duct 420 to the air outlet 460 under the action of the cross-flow fan 410. In order to improve the cooling effect, the top plate of the condensing box 430 is a cooling plate, which can be made of a metal plate. A meandering cooling water pipe 470 can also be arranged on the top of the cooling plate to reduce the temperature of the cooling plate. The water used in the cooling water pipe 470 can be taken from the water tank 500, and the water that absorbs heat can flow back to the water tank 500, so that energy can be recycled.

[0084] In order to concentrate and guide the condensed water in the condensing system 400 to the inner wall surface of the cooking cavity 800, concentrate the recovery of the condensed water, and improve the recovery efficiency of the condensed water, the large steam internal circulation system of the present embodiment further comprises a flow guiding system 600 in communication with the condensing system 400. The flow guiding system 600 guides the condensed water to the inner wall surface of the cooking cavity 800.

[0085] Specifically, as one of the embodiments, the flow guiding system 600 comprises a water collecting tray 610 and a flow guiding pipe 620. The water collecting tray 610 is located below the first through hole 440 and is an integrally formed plate-shaped member comprising a first flow guiding groove 611, a mounting portion 612 and a second flow guiding groove 613 arranged in sequence from left to right. The mounting portion 612 is connected to the first flow guiding groove 611 and the second flow guiding groove 613 by a slope. The mounting portion 612 is mounted on the top surface of the cooking cavity 800. The first flow guiding groove 611 and the second flow guiding groove 613 are located below the two first through holes 440 and guide the condensed water to the inner wall of the cooking cavity 800. The first flow guiding groove 611 and the second flow guiding groove 613 are both inclined downward from the mounting plate 614 to the inner wall of the cooking cavity, and the cross-sectional size gradually decreases, as shown in the figure. Figure 9 When the amount of condensed water is large, the first flow guiding groove 611 and the second flow guiding groove 613 have a slender structure, which may easily produce abnormal noise if the stability is poor. Therefore, in addition to the mounting portion 612, the present embodiment also provides a mounting plate 614 and a support rod 615. The mounting plate 614 is fixed together with the mounting portion 612 on the top wall of the cooking cavity, and the bottom of the mounting plate 614 is provided with a first clamping portion 616. The support rod 615 is clamped in the first clamping portion 616 and the first clamping portion 616 is supported on the bottom of the support rod 615. The second clamping portion 617 is connected to the first flow guiding groove 611 and the second flow guiding groove 613. The second clamping portion 617 is clamped on the top of the support rod 615. The first clamping portion 616 and the second clamping portion 617 cooperate to realize the stable connection of the support rod 615.

[0086] As another embodiment, the diversion system 600 of the present embodiment comprises a water pan 610 and a diversion pipe 620, the water pan 610 is located below the first through hole 440, the water pan 610 is installed on a support rod 615, the support rod 615 can be fixedly installed on the inner wall of the cooking cavity 800 or fixedly installed on the heating pipe 900, as shown in the figure. The diversion system 600 of this embodiment can also guide the condensed water to the inner wall of the cooking cavity 800, and the diversion system 600 of this embodiment has simple structure and is easy to produce and manufacture. Figure 10

[0087] The specific implementation process of the present embodiment is as follows:

[0088] In the first stage, the first evaporator 200 is controlled to work continuously, and the continuous working of the first evaporator 200 generates sufficient steam, part of which is condensed by the condensing system 400 to obtain condensed water, which is used as part or all of the water source of the second evaporator 300; in the second stage, the first evaporator 200 and the second evaporator 300 are controlled to work alternately and / or simultaneously; in the third stage, the first evaporator 200 is controlled to stop working, and the second evaporator 300 works to evaporate the condensed water generated continuously, reducing or avoiding the residue of the condensed water. By controlling the working of the first evaporator 200 and the second evaporator 300, the present application ensures that there is always an evaporator working during the cooking process, so that large steam and continuous steaming can be realized, and the cooking efficiency and effect are improved. The present embodiment uses the cross double steaming of the first evaporator 200 and the second evaporator 300, which not only realizes the functions of large steam and continuous steaming, but also simplifies the structure of the steaming oven and reduces the manufacturing cost of the steaming oven.

[0089] Embodiment five

[0090] The present embodiment is the second embodiment of the large steam internal circulation system, which is used to realize the large steam internal circulation method as described in embodiment two. The present embodiment is similar to embodiment four, and the difference lies in that it further comprises a second water pump connected between the water tank 500 and the second evaporator 300. The first water pump is used to pump the water in the water tank 500 into the first evaporator 200 as the water source of the first evaporator 200, and the second water pump is used to pump the water in the water tank 500 into the second evaporator 300 as the water source of the second evaporator 300. The first evaporator 200 and the second evaporator 300 are independently controlled, and the second evaporator 300 does not need to wait for the generation of condensed water to work, and there is no problem of insufficient water source leading to work interruption due to insufficient condensed water. Generally, the second evaporator 300 only adds water from the water tank 500 in the temperature flushing stage, and does not need to pump water from the water tank 500 in the remaining stages, but uses the condensed water generated by the condensing system 400 as the water source.

[0091] ​It should be noted that in the embodiment, the two water pumps of the first water pump and the second water pump can also be combined with the scheme of one water pump and the electromagnetic valve. Specifically, the water inlet 310 of the first water pump is connected to the water tank 500, the first water pump has two water outlets, one of the two water outlets is communicated with the first evaporator 200 through the first branch, and the other water outlet is communicated with the second evaporator 300 through the second branch. An electromagnetic valve is arranged on the first branch and the second branch respectively to control the on-off of the first branch and the second branch, so that the independent control of the first evaporator 200 and the second evaporator 300 is realized through one water pump.

[0092] The specific implementation steps of the embodiment are similar to any one of the first embodiment to the third embodiment, and the difference is that the first evaporator 200 and the second evaporator 300 are independently double-evaporated in the embodiment, and the first evaporator 200 and the second evaporator 300 are both controlled independently, so that the effects of large steam and continuous evaporation can be maximized.

[0093] Embodiment six

[0094] The embodiment is the third embodiment of the large steam internal circulation system, and is used to realize the large steam internal circulation method of the third embodiment. The embodiment is similar to the fourth embodiment or the fifth embodiment, and the difference is that the auxiliary temperature shock system is further included, and the auxiliary temperature shock system is connected with the controller 100. When rapid temperature rise is needed or the temperature cannot be maintained only by the first evaporator 200 and the second evaporator 300, the controller 100 can start the auxiliary temperature shock system as needed. In the embodiment, the auxiliary temperature shock system can adopt the heating system of the steam oven.

[0095] The specific implementation steps of the embodiment are similar to any one of the first embodiment to the fourth embodiment, and the difference is that in the first stage, the first evaporator 200 and the auxiliary temperature shock system are started at the same time, so that the temperature shock time can be shortened and the cooking efficiency can be improved; in the second stage, only the first evaporator 200 and the second evaporator 300 can realize the stable temperature and humidity stage, and the auxiliary temperature shock system is closed, which is beneficial to saving energy; in the temperature and humidity maintaining stage, if the temperature and humidity cannot be maintained only by the first evaporator 200 and the second evaporator 300, the auxiliary temperature shock system is controlled according to the temperature in the cooking cavity 800, so that the temperature can be effectively maintained; in the third stage, there is little residual condensed water, and only the second evaporator 300 can complete evaporation, so the auxiliary temperature shock system does not need to be started, and energy waste is avoided.

[0096] Embodiment seven

[0097] The embodiment is a steam oven, which comprises a box body 700, a cover body, and the large steam inner circulation system described in any one of Embodiment Four to Embodiment Six, the cover body is connected to the box body 700, and a cooking cavity 800 is formed in the box body 700, the controller 100, the first evaporator 200, the second evaporator 300, the condensing system 400, the water tank 500, and the first water pump are all installed in the box body 700.

[0098] In the embodiment, by controlling the operation of the first evaporator 200 and the second evaporator 300, it is ensured that one of the evaporators is always working during the cooking process; by setting the condensing system 400, the steam is recovered to reduce the water consumption caused by continuous operation, the capacity of the water tank 500 can easily meet the demand of long-time steaming, the effective recovery of steam also reduces the amount of steam discharged, avoiding damage to the installation cabinet; the setting of the second evaporator 300 recovers and utilizes the condensate water generated by continuous operation for evaporation, reducing or avoiding the residue of condensate water and simplifying the cleaning process. The steam oven of the present application realizes large steam and continuous steaming by controlling the generation of steam, the recovery of steam, and the treatment of condensate water, effectively improving the cooking efficiency and cooking effect.

[0099] In the specific content of the above specific embodiments, each technical feature can be combined arbitrarily without contradiction, and to make the description concise, not all possible combinations of the above technical features are described, however, as long as the combination of these technical features does not exist contradiction, it should be considered as the scope of the present application.

[0100] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation manner of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and impossible to exhaust all the implementation manners. Any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A method for large-scale internal steam circulation, characterized in that, Includes the following steps: First stage: Control the first evaporator (200) to work and the second evaporator (300) to work until the cooking cavity (800) is filled with saturated steam; Second stage: Control the first evaporator (200) and the second evaporator (300) to work until the temperature in the cooking cavity (800) is maintained within the set temperature range and the humidity in the cooking cavity (800) is maintained within the set humidity range; Third stage: Control the first evaporator (200) to stop working and the second evaporator (300) to work continuously for time T5 to evaporate the condensate in the cooking cavity (800); The first stage is the temperature and humidity rinsing stage, the second stage is the stage of stabilizing and maintaining temperature and humidity, and the third stage is the water removal stage. Second stage: Control the first evaporator (200) to work for time t1, stop for time t2, then start working again and repeat this cycle until time T4; Control the second evaporator (300) to work continuously until time T3; Then Control the second evaporator (300) to work for time t4, stop for time t5, then start working again and repeat this cycle until time T4; The time t1 is the period from when the temperature of the first evaporator (200) starts working from below 90 degrees to when it stops at 120 degrees; the time t2 is the period from when the temperature of the first evaporator (200) starts working from above 120 degrees to when it cools down to 90 degrees; the time t4 is the period from when the temperature of the second evaporator (300) starts working from below 90 degrees to when it stops at 120 degrees; and the time t5 is the period from when the temperature of the second evaporator (300) starts working from above 120 degrees to when it cools down to 90 degrees. The T3 time is the time required from the moment the second evaporator (300) first reaches the set water volume until the cooking chamber (800) is filled with saturated steam. The end time of the T4 time is the time before the program ends. The T5 time is the program end time.

2. The large-scale internal steam circulation method according to claim 1, characterized in that, The water source for the first evaporator (200) comes from the water tank (500), and the water source for the second evaporator (300) comes from the condensate in the cooking chamber (800) and the water overflowing from the first evaporator (200) and flowing into the second evaporator (300) along the inner wall of the cooking chamber (800).

3. The large-scale internal steam circulation method according to claim 1, characterized in that, The water source for the first evaporator (200) comes from the water tank (500), and the water source for the second evaporator (300) comes from the condensate in the water tank (500) and the cooking cavity (800).

4. The large-scale internal steam circulation method according to claim 1, characterized in that, It also includes the auxiliary temperature step: First stage: While the first evaporator (200) and the second evaporator (300) are working, the auxiliary temperature boosting is started; Second stage: During the stable temperature and humidity stage, the auxiliary heating is turned off; during the temperature and humidity maintenance stage, the auxiliary heating is activated based on the temperature inside the cooking cavity (800). Third stage: Stop auxiliary heating.

5. A large steam internal circulation system for a steam oven, used to implement the large steam internal circulation method according to any one of claims 1 to 4, characterized in that, The device includes a controller (100), a first evaporator (200), a second evaporator (300), a condensing system (400), a water tank (500), and a first water pump. The first evaporator (200), the second evaporator (300), the condensing system (400), and the first water pump are all connected to the controller (100). The first water pump is connected between the water tank (500) and the first evaporator (200). The condensing system (400) condenses water vapor in the cooking chamber (800) into condensate. The condensate flows to the second evaporator (300) as the water source for the second evaporator (300). The controller (100) stores the large steam internal circulation method as described in any one of claims 1 to 4.

6. The large internal steam circulation system of the steam oven according to claim 5, characterized in that, It also includes a flow guiding system (600) connected to the condensation system (400), which guides the condensate to the inner wall of the cooking cavity (800).

7. The large internal steam circulation system of the steam oven according to claim 6, characterized in that, The condensation system (400) includes a cross-flow fan (410), an air duct (420), and a condensation box (430). The condensation box (430) is connected above a portion of the air duct (420). The bottom plate of the condensation box (430) is obliquely upward along the steam flow direction. The cooking cavity (800) is connected to the condensation box (430) through a first through hole (440). The condensation box (430) and the air duct (420) are connected through several parallel second through holes (450). The air outlet (460) of the air duct (420) is located on the front panel of the steam oven, and the cross-flow fan (410) is located near the rear panel. The flow guiding system (600) includes a water receiving tray (610) and a flow guiding pipe (620). The water receiving tray (610) is located below the first through hole (440).

8. The large internal steam circulation system of the steam oven according to claim 5, characterized in that, It also includes a second water pump, which is connected between the water tank (500) and the second evaporator (300).

9. The large internal steam circulation system of the steam oven according to claim 5, characterized in that, It also includes an auxiliary temperature control system, which is connected to the controller (100).

10. A steam oven, characterized in that, The device includes a housing (700), a cover, and a large steam internal circulation system as described in any one of claims 5 to 9, wherein the cover is connected to the housing (700) and a cooking cavity (800) is formed inside the housing (700), and the controller (100), the first evaporator (200), the second evaporator (300), the condensation system (400), the water tank (500), and the first water pump are all installed in the housing (700).

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