Large steam internal circulation method and system and steam oven

Abstract

The invention relates to the technical field of cooking utensils, in particular to a large steam internal circulation method and system and a steam oven, and the method comprises the following steps: a first stage: controlling a first evaporator and a second evaporator to work until a cooking cavity is filled with saturated steam; in the second stage, the first evaporator and the second evaporator are controlled to work until the temperature in the cooking cavity is maintained within the set temperature range and the humidity position in the cooking cavity is within the set humidity range; in the third stage, the first evaporator is controlled to stop working, the second evaporator continuously works, and condensate water in the cooking cavity is evaporated; the first stage is a temperature and humidity washing stage, the second stage is a stage for stabilizing and maintaining the temperature and humidity, and the third stage is a water removal stage. By means of steam generation, steam recovery and condensate water treatment control, large steam and continuous steam are achieved, and the cooking efficiency and the cooking effect are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking appliances, and more specifically, to a large steam internal circulation method, system and a steam oven. Background Art

[0002] As people's cooking needs become more diverse, more and more steamers and ovens have entered the kitchens of ordinary families. However, if you buy a steamer and an oven at the same time, it will take up too much kitchen space. Therefore, steam ovens with both steamer and oven functions have begun to appear on the market. With the development of steam oven technology, the functions of steam ovens have also been expanded to include heating, thawing, baking, fermentation, grilling and other functions.

[0003] Most current steam ovens only have a single evaporator, which is a hidden evaporator or an external evaporation plate. However, products with a single evaporator have the following problems: 1. The continuous evaporation consumes too much water and the water tank capacity is insufficient; 2. The continuous evaporation produces too much condensed water, which is inconvenient to clean; 3. The continuous exhaust of steam is too much, which can easily damage the installation cabinet. As mentioned above, current products with a single evaporator are difficult to achieve continuous evaporation, resulting in insufficient steam. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that products with a single evaporator are difficult to achieve continuous evaporation, resulting in insufficient steam, and to provide a large steam internal circulation method, system and steam oven that can achieve large steam and continuous steaming, thereby improving cooking efficiency and cooking effects.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

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

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

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

[0009] The third stage: controlling the first evaporator to stop working and the second evaporator to work continuously to evaporate the condensed water in the cooking cavity;

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

[0011] The large steam internal circulation method of the present invention is as follows: in the first stage, the first evaporator continuously works to generate sufficient steam, part of the steam condenses in the cooking chamber to obtain condensed water, and the condensed water serves as part of 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 condensed water generated by the continuous work, thereby reducing or avoiding the residual condensed water. The present invention controls the work of the first evaporator and the second evaporator to ensure that there is always an evaporator working during the cooking process, thereby achieving large steam and continuous steaming, and improving cooking efficiency and cooking effect.

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

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

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

[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. The process of the second stage is:

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

[0017] The water source of the second evaporator comes from the condensed water and the water tank. This method is an independent double-distillation method.

[0018] Preferably, the t1 time is the time period when the temperature of the first evaporator starts working from less than 90 degrees to 120 degrees and stops, and the t2 time is the time period when the temperature of the first evaporator starts working from more than 120 degrees and cools down to 90 degrees; the t4 time is the time period when the temperature of the second evaporator starts working from less than 90 degrees to 120 degrees and stops, and the t5 time is the time period when the temperature of the second evaporator starts working from more than 120 degrees and cools down to 90 degrees. The first evaporator and the second evaporator are started and stopped in the second stage according to the temperature, the temperature and humidity in the cooking cavity are stabilized and maintained, the control is accurate and energy consumption can be saved.

[0019] Preferably, the step of assisting the temperature surge is also included:

[0020] The first stage: while the first evaporator and the second evaporator are working, the auxiliary temperature surge is started;

[0021] The second stage: in the stage of stabilizing temperature and humidity, the auxiliary temperature surge is turned off; in the stage of maintaining temperature and humidity, whether to start the auxiliary temperature surge is determined according to the temperature in the cooking cavity;

[0022] The third stage: stop auxiliary temperature rush.

[0023] In the first stage, the first evaporator and the auxiliary temperature rush are started at the same time, which can shorten the temperature rush time and improve the cooking efficiency; in the second stage, the temperature and humidity stabilization stage can be achieved by relying solely on the first evaporator and / or the second evaporator, and the auxiliary temperature rush is turned off, which is conducive to saving energy consumption; in the temperature and humidity maintenance stage, if the temperature and humidity cannot be maintained by relying solely on the first evaporator and the second evaporator, the auxiliary temperature rush is turned on or off according to the temperature in the cooking cavity, so as to effectively maintain the temperature stability; in the third stage, there is less residual condensed water, and evaporation can be completed by using only the second evaporator, so there is no need to turn on the auxiliary temperature rush to avoid energy waste.

[0024] The present invention also provides a large steam internal circulation system for realizing the large steam internal circulation method as described above, comprising a controller, a first evaporator, a second evaporator, a condensation system, a water tank and a first water pump, wherein the first evaporator, the second evaporator, the condensation system and the first water pump are all connected to the controller, the first water pump is connected between the water tank and the first evaporator, the condensation system condenses the water vapor in the cooking cavity into condensed water, and the condensed water flows to the second evaporator as a water source for the second evaporator.

[0025] The large steam internal circulation system of the present invention controls the first evaporator to work continuously in the first stage, and the first evaporator works continuously to generate sufficient steam, and part of the steam is condensed through the condensation system to obtain condensed water, and the condensed water is used as part of the water source or the whole water source of the second evaporator; in the second stage, the first evaporator and the second evaporator are controlled to work alternately and / or simultaneously; in the third stage, the first evaporator is controlled to stop working and the second evaporator is controlled to work to evaporate the condensed water generated by the continuous work, thereby reducing or avoiding the residual condensed water. The present invention controls the work of the first evaporator and the second evaporator to ensure that there is always an evaporator working during the cooking process, so as to achieve large steam and continuous steaming, and improve cooking efficiency and cooking effect.

[0026] Furthermore, it also includes a diversion system connected to the condensation system, and the diversion system guides the condensed water to the inner wall surface of the cooking cavity. The function of the diversion system is to centrally guide the condensed water generated by the condensation system to the inner wall surface of the cooking cavity, centrally recover the condensed water, and improve the recovery efficiency of the condensed water.

[0027] Furthermore, it also includes a second water pump, which is connected between the water tank and the second evaporator. The first water pump is used to pump the water in the water tank into the first evaporator as the water source of the first evaporator, and the second water pump is used to pump the water in the water tank into the second evaporator as the water source of the second evaporator. The first evaporator and the second evaporator are controlled independently, and the second evaporator does not need to wait until condensed water is generated before working, and there is no problem of work interruption due to insufficient water source caused by insufficient condensed water.

[0028] Furthermore, an auxiliary temperature surge system is included, and the auxiliary temperature surge system is connected to the controller. When the temperature needs to be quickly raised or the temperature cannot be maintained by the first evaporator or the second evaporator alone, the controller can start the auxiliary temperature surge system as needed.

[0029] The present invention also provides a steam oven, comprising a box body, a cover body and the large steam internal circulation system as described above, the cover body is connected to the box body and a cooking cavity is formed in the box body, the controller, the first evaporator, the second evaporator, the condensation system, the water tank and the first water pump are all installed in the box body.

[0030] The steam oven of the present invention controls the operation of the first evaporator and the second evaporator to ensure that there is always an evaporator in operation during the cooking process; by setting a condensation system, steam is recovered to reduce the water consumption caused by continuous operation, and the water tank capacity can more easily meet the needs of long-term steaming. The steam is effectively recovered, which also reduces the amount of steam discharged, avoiding damage to the installation cabinet; the second evaporator is set to recycle the condensed water generated by continuous operation for evaporation, reducing or avoiding the residual condensed water and simplifying the cleaning process. The steam oven of the present invention realizes large steam and continuous steaming by controlling the generation of steam, the recovery of steam, and the treatment of condensed water, and effectively improves cooking efficiency and cooking effect.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention controls the operation of the first evaporator and the second evaporator to ensure that one evaporator is always in operation during the cooking process, thereby achieving continuous steaming.

[0033] The present invention condenses and recycles the steam in the cooking cavity, and the recycled steam reduces the water consumption caused by continuous operation, and the water tank capacity can easily meet the needs of long-term steaming. The steam is effectively recycled, which also reduces the amount of discharged steam, avoiding damage to the installation cabinet;

[0034] The present invention recycles and evaporates the condensed water generated by continuous operation by setting a second evaporator, thereby reducing or avoiding the residual condensed water and simplifying the cleaning process;

[0035] The present invention realizes large steam and continuous steaming by controlling the generation of steam, the recovery of steam, and the processing of condensed water, thereby effectively improving the cooking efficiency and the cooking effect. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

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

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

[0044] Fig. 9 It is a structural schematic diagram of a flow diversion system for a large steam internal circulation system condensation system;

[0045] Fig.10 It is a structural schematic diagram of another flow diversion system of the condensation system of the large steam internal circulation system;

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

[0047] The present invention is further described below in conjunction with specific implementation methods. The accompanying drawings are only used for exemplary descriptions and are only schematic diagrams, not actual drawings, and cannot be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying 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 accompanying drawings may be omitted.

[0048] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0049] Embodiment 1

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

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

[0052] The second stage: controlling 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 position in the cooking cavity 800 is within the set humidity range;

[0053] The third stage: controlling the first evaporator 200 to stop working and the second evaporator 300 to continue working 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 stage of stabilizing and maintaining temperature and humidity, and the third stage is a water removal stage.

[0055] Specifically, in this 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 and flowing into the second evaporator 300 along the inner wall of the cooking cavity 800. Based on this, the specific steps of the method described in this embodiment are as follows:

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

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

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

[0059] Before the first stage, there is a pumping stage, in which the water in the water tank 500 is pumped into the first evaporator 200, and the pumping process lasts for T1 time. In order to prevent the second evaporator 300 from being unable to start working for a long time, in this embodiment, since the second evaporator 300 is located at the bottom of the first evaporator 200, the water in the first evaporator 200 can 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 pumping amount. The amount of water flowing into the second evaporator 300 can be achieved by controlling the pumping amount. In this way, in the first stage, the first evaporator 200 and the second evaporator 300 can work simultaneously to achieve rapid temperature and humidity flushing. When water is fed into the second evaporator 300 in this overflow manner, after the water is fed into the second evaporator 300, a part of the water in the first evaporator 200 (such as half of it) is pumped out into the water tank 500 to ensure the safe operation 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 to the cooking chamber 800 being filled with saturated steam; T3 is the time required from the second evaporator 300 reaching the set water volume for the first time to the cooking chamber 800 being filled with saturated steam; the end time of T4 is the time before the program ends, and T5 is the program end time.

[0061] In addition, in this embodiment, the t1 time is the time period when the temperature of the first evaporator 200 starts working from less than 90 degrees to 120 degrees and stops, and the t2 time is the time period when the temperature of the first evaporator 200 starts working from more than 120 degrees and drops to 90 degrees; the t4 time is the time period when the temperature of the second evaporator 300 starts working from less than 90 degrees to 120 degrees and stops, and the t5 time is the time period when the temperature of the second evaporator 300 starts working from more than 120 degrees and drops to 90 degrees. In this embodiment, the temperature in the first evaporator 200 and the second evaporator 300 can be detected by arranging temperature sensors in the first evaporator 200 and the second evaporator 300. In the stage of stabilizing and maintaining the temperature and humidity, the first evaporator 200 and the second evaporator 300 are controlled to start and stop in the second stage according to the temperature, the temperature and humidity in the cooking cavity 800 are stabilized and maintained, and the temperature and humidity in the cooking cavity 800 are accurately controlled and energy consumption can be saved.

[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 work to generate sufficient steam, and part of the steam condenses in the cooking cavity 800 to obtain condensed water, which serves as part of the water source or the entire water source of the second evaporator 300; in the second stage, the first evaporator 200 and the second evaporator 300 work alternately and / or simultaneously; in the third stage, the second evaporator 300 works to evaporate the condensed water generated by the continuous work, reducing or avoiding the residual condensed water. By controlling the work of the first evaporator 200 and the second evaporator 300, it is ensured that there is always an evaporator working during the cooking process, so that large steam and continuous steaming can be achieved, and the cooking efficiency and cooking effect can be improved. This embodiment uses the first evaporator 200 and the second evaporator 300 for cross double steaming. In addition to achieving better large steam and continuous steaming functions, it can also simplify the structure of the steam oven and reduce the manufacturing cost of the steam oven.

[0064] Embodiment 2

[0065] This embodiment is the second embodiment of the large steam internal circulation method. This embodiment 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 condensed water in the water tank 500 and the cooking cavity 800. Figure 2 Based on this, the specific steps of the method described in this embodiment are as follows:

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

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

[0068] The third stage: controlling the first evaporator 200 to stop working and 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 at the same time, 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 the maximum time required to pump water into the first evaporator 200 and the second evaporator 300, T2 is the time required from the first evaporator 200 reaching the set water volume for the first time to the cooking chamber 800 being filled with saturated steam; T3 is the time required from the second evaporator 300 reaching the set water volume for the first time to the cooking chamber 800 being filled with saturated steam; the end time of T4 is the time before the program ends, and T5 is the program end time.

[0071] In addition, in this embodiment, the t1 time is the time period when the temperature of the first evaporator 200 starts working from less than 90 degrees to 120 degrees and stops, and the t2 time is the time period when the temperature of the first evaporator 200 starts working from more than 120 degrees and drops to 90 degrees; the t4 time is the time period when the temperature of the second evaporator 300 starts working from less than 90 degrees to 120 degrees and stops, and the t5 time is the time period when the temperature of the second evaporator 300 starts working from more than 120 degrees and drops to 90 degrees. In this embodiment, the temperature in the first evaporator 200 and the second evaporator 300 can be detected by arranging temperature sensors in the first evaporator 200 and the second evaporator 300. In the stage of stabilizing and maintaining the temperature and humidity, the first evaporator 200 and the second evaporator 300 are controlled to start and stop in the second stage according to the temperature, the temperature and humidity in the cooking cavity 800 are stabilized and maintained, and the temperature and humidity in the cooking cavity 800 are accurately controlled and energy consumption can be saved.

[0072] The specific implementation steps of this embodiment are similar to those of the first embodiment, except that:

[0073] This embodiment utilizes the first evaporator 200 and the second evaporator 300 for independent double distillation. The first evaporator 200 and the second evaporator 300 are individually controlled, so that the effects of large steam and continuous distillation can be maximized.

[0074] Embodiment 3

[0075] This embodiment is the third embodiment of the large steam internal circulation method. This embodiment is similar to the first or second embodiment, except that it further includes an auxiliary temperature rushing step:

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

[0077] The second stage: in the stage of stabilizing temperature and humidity, the auxiliary temperature charging is turned off; in the stage of maintaining temperature and humidity, whether to start the auxiliary temperature charging is determined according to the temperature in the cooking cavity 800;

[0078] The third stage: stop auxiliary temperature rush.

[0079] The specific implementation steps of this embodiment are similar to those of the second embodiment, except that:

[0080] In the first stage, the first evaporator 200 and the auxiliary temperature rush are started at the same time, which can shorten the temperature rush time and improve the cooking efficiency; in the second stage, the temperature and humidity stability stage can be achieved by relying solely on the first evaporator 200 and the second evaporator 300, and the auxiliary temperature rush is turned off, which is conducive to saving energy consumption; in the temperature and humidity maintenance stage, if the temperature and humidity cannot be maintained by relying solely on the first evaporator 200 and the second evaporator 300, the auxiliary temperature rush is turned on or off according to the temperature control in the cooking cavity 800, so as to effectively maintain the temperature stability; in the third stage, there is less residual condensed water, and evaporation can be completed by using only the second evaporator 300, so there is no need to turn on the auxiliary temperature rush to avoid energy waste.

[0081] Embodiment 4

[0082] This embodiment is the first embodiment of the large steam internal circulation system, which is used to implement the large steam internal circulation method as described in the first embodiment, including a controller 100, a first evaporator 200, a second evaporator 300, a condensation system 400, a water tank 500 and a first water pump, wherein the first evaporator 200, the second evaporator 300, the condensation 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 condensation system 400 condenses the water vapor in the cooking cavity 800 into condensed water, and the condensed water flows to the second evaporator 300 as a water source for the second evaporator 300, as shown in FIG. Figure 3-4 In this embodiment, the second evaporator 300 is fixedly arranged at the bottom of the cooking cavity. The second evaporator 300 includes a water inlet 310, a lower concave cavity 320 and an evaporation cavity 330 which are sequentially connected. A heating tube 340 having a shape similar to the outer edge of the evaporation cavity 330 is arranged in the evaporation cavity 330. The design of the lower concave cavity 320 facilitates the water from the water inlet 310 to enter the evaporation cavity 330 smoothly and quickly. The heating tube 340 heats the water in the evaporation cavity 330 to form steam. Figure 5-6 As shown; in this embodiment, a temperature sensor may be provided in the second evaporator 300 to determine whether there is water in the evaporation disk; a convex jump protector or a fuse protector may also be provided 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 to the top of a part of the air duct 420. The bottom plate of the condensation box 430 is arranged 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 a plurality of second through holes 450 arranged side by side. The air outlet 460 of the air duct 420 is arranged on the front panel of the steam oven, and the cross-flow fan 410 is arranged at a position close to the rear panel. In this way, the air duct 420 is distributed almost in the entire depth direction of the steam oven, such as Figure 7 ,8 As shown. Under the action of the cross-flow fan 410, the steam in the cooking cavity 800 enters the condensation box 430 through the first through hole 440, and condenses into condensed water in the condensation box 430. The condensed water flows along the bottom plate of the condensation box 430 to the first through hole 440, and flows from the first through hole 440 to the cooking cavity 800; the cooled gas flows through the air duct 420 to the air outlet 460 for discharge under the action of the cross-flow fan 410. In order to improve the cooling effect, the top plate of the condensation box 430 of this embodiment is a cooling plate, and the cooling plate can be made of a metal plate. A circuitous cooling water pipe 470 can also be set on the top of the cooling plate to reduce the temperature of the cooling plate. The water for 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 recovery can be achieved.

[0084] In order to centrally guide the condensed water in the condensation system 400 to the inner wall surface of the cooking cavity 800, centrally recover the condensed water, and improve the recovery efficiency of the condensed water, the large steam internal circulation system of this embodiment also includes a guide system 600 connected to the condensation system 400, and the guide system 600 guides the condensed water to the inner wall surface of the cooking cavity 800.

[0085] Specifically, as one of the embodiments, the diversion system 600 includes a water receiving tray 610 and a diversion pipe 620. The water receiving tray 610 is located below the first through hole 440 and is an integrally formed plate-shaped member, including a first diversion groove 611, a mounting portion 612, and a second diversion groove 613 arranged from left to right. The mounting portion 612 and the first diversion groove 611 and the second diversion groove 613 are connected by an inclined surface. The mounting portion 612 is installed on the top surface of the cooking cavity 800. The first diversion groove 611 and the second diversion groove 613 are located below the two first through holes 440 to guide the condensed water to the inner wall of the cooking cavity 800. The first diversion groove 611 and the second diversion groove 613 are both inclined downward from the mounting plate 614 toward the inner wall of the cooking cavity, and the cross-sectional size gradually decreases, such as Fig. 9 When the amount of condensed water is large, due to the first guide groove 611 and the second guide groove 613 and the slender structure, if the fixing stability is insufficient, abnormal noise is likely to occur. Therefore, in addition to the mounting portion 612, a mounting plate 614 and a support rod 615 are also provided in this embodiment. The mounting plate 614 and the mounting portion 612 are fixed together on the top wall of the cooking pot, and a first clamping portion 616 is provided at the bottom of the mounting plate 614. 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; a second clamping portion 617 is connected to the first guide groove 611 and the second guide groove 613, and the second clamping portion 617 is clamped with the support rod 615, and 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 achieve a stable connection of the support rod 615.

[0086] As another embodiment, the flow guide system 600 of this embodiment includes a water receiving tray 610 and a flow guide pipe 620, wherein the water receiving tray 610 is located below the first through hole 440, and the water receiving tray 610 is installed on a support rod 615, and the support rod 615 can be fixedly installed on the inner wall of the cooking cavity 800 or fixed on the heating tube 900. Fig.10 The flow guiding system 600 of this embodiment can also guide the condensed water to the inner wall of the cooking cavity 800, and the flow guiding system 600 of this embodiment has a simple structure and is easy to manufacture.

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

[0088] In the first stage, the first evaporator 200 is controlled to work continuously, and the first evaporator 200 works continuously to generate sufficient steam, and part of the steam is condensed through the condensation system 400 to obtain condensed water, which is used as part of the water source or the whole 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 is controlled to work to evaporate the condensed water generated by the continuous work, thereby reducing or avoiding the residual condensed water. The present invention controls the work of the first evaporator 200 and the second evaporator 300 to ensure that there is always an evaporator working during the cooking process, so as to achieve large steam and continuous steaming, and improve cooking efficiency and cooking effect. This embodiment uses the first evaporator 200 and the second evaporator 300 for cross double steaming, which can not only achieve the functions of better large steam and continuous steaming, but also simplify the structure of the steaming oven and reduce the manufacturing cost of the steaming oven.

[0089] Embodiment 5

[0090] This embodiment is the second embodiment of the large steam internal circulation system, which is used to implement the large steam internal circulation method as described in the second embodiment. This embodiment is similar to the fourth embodiment, except that it also includes a second water pump, which is 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 until condensed water is generated before working, and there is no problem of insufficient condensed water causing work interruption due to insufficient water source. Generally, the second evaporator 300 will only add water from the water tank 500 during the temperature-inrush stage, and the water in the water tank 500 does not need to be pumped for water addition in the remaining stages, but the condensed water generated by the condensation system 400 is used as the water source.

[0091] It should be noted that, in this embodiment, the solution of the first water pump and the second water pump can also adopt a solution combining a water pump and a solenoid valve. Specifically, the water inlet 310 of the first water pump is connected to the water tank 500, and the first water pump has two water outlets, one of which is connected to the first evaporator 200 through the first branch, and the other is connected to the second evaporator 300 through the second branch. A solenoid valve is respectively arranged on the first branch and the second branch to control the on and off of the first branch and the second branch, so that the first evaporator 200 and the second evaporator 300 are also independently controlled by a water pump.

[0092] The specific implementation steps of this embodiment are similar to any one of the embodiments 1 to 3, except that: this embodiment uses the first evaporator 200 and the second evaporator 300 for independent double distillation, and the first evaporator 200 and the second evaporator 300 are individually controlled, which can maximize the effects of large steam and continuous distillation.

[0093] Embodiment 6

[0094] This embodiment is the third embodiment of the large steam internal circulation system, which is used to implement the large steam internal circulation method described in the third embodiment. This embodiment is similar to the fourth embodiment or the fifth embodiment, except that it also includes an auxiliary temperature surge system, which is connected to the controller 100. In the stage where rapid temperature rise is required or when the temperature cannot be maintained by relying solely on the first evaporator 200 and the second evaporator 300, the controller 100 can start the auxiliary temperature surge system as needed. In this embodiment, the auxiliary temperature surge system can use the heating system of the steam oven.

[0095] The specific implementation steps of this embodiment are similar to any one of the embodiments from Example 1 to Example 4, except that: in the first stage, the first evaporator 200 and the auxiliary temperature rush are started at the same time, which can shorten the temperature rush time and improve cooking efficiency; in the second stage, the temperature and humidity stability stage can be achieved by relying only on the first evaporator 200 and the second evaporator 300, and the auxiliary temperature rush is turned off, which is conducive to saving energy consumption; in the temperature and humidity maintenance stage, if the temperature and humidity cannot be maintained by relying only on the first evaporator 200 and the second evaporator 300, the auxiliary temperature rush is turned on or off according to the temperature control in the cooking cavity 800, so as to effectively maintain the temperature stability; in the third stage, there is less residual condensed water, and evaporation can be completed by using only the second evaporator 300, so there is no need to turn on the auxiliary temperature rush to avoid energy waste.

[0096] Embodiment 7

[0097] The present embodiment is an embodiment of a steam oven, comprising a box body 700, a cover body and the large steam internal circulation system described in any one of Embodiments 4 to 6, 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 condensation system 400, the water tank 500 and the first water pump are all installed in the box body 700.

[0098] When this embodiment is implemented, by controlling the operation of the first evaporator 200 and the second evaporator 300, it is ensured that there is always an evaporator working during the cooking process; by setting the condensation system 400, the steam is recycled to reduce the water consumption caused by continuous operation, and the capacity of the water tank 500 can easily meet the needs of long-term steaming. The steam is effectively recycled, which also reduces the amount of steam discharged, avoiding damage to the installation cabinet; the second evaporator 300 is set to recycle the condensed water generated by continuous operation for evaporation, reduce or avoid the residue of condensed water, and simplify the cleaning process. The steam oven of the present invention realizes large steam and continuous steaming by controlling the generation of steam, the recovery of steam, and the treatment of condensed water, and effectively improves cooking efficiency and cooking effect.

[0099] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A large steam internal circulation method, characterized in that: The following steps are involved: The first stage: controlling the first evaporator (200) to operate and the second evaporator (300) to operate until the cooking chamber (800) is filled with saturated steam; The second stage: controlling the first evaporator (200) and the second evaporator (300) to work until the temperature in the cooking cavity (800) is maintained within a set temperature range and the humidity in the cooking cavity (800) is within a set humidity range; The third stage: controlling the first evaporator (200) to stop working and the second evaporator (300) to continue working, so as to evaporate the condensed water in the cooking cavity (800); The first stage is a temperature and humidity flushing stage, the second stage is a stage of stabilizing and maintaining temperature and humidity, and the third stage is a water removal stage.

2. The large steam internal circulation method according to claim 1, characterized in 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 condensed water in the cooking cavity (800) and the water overflowing from the first evaporator (200) and flowing into the second evaporator (300) along the inner wall of the cooking cavity (800). The process of the second stage is as follows: The second stage: controlling the first evaporator (200) to work for time t1, stop for time t2, and then work again, and repeating the cycle until time T3 and time T4; controlling the second evaporator (300) to work continuously until time T3; and then controlling the second evaporator (300) to work for time t4, stop for time t5, and then work again, and repeating the cycle until time T4.

3. The large steam internal circulation method according to claim 1, characterized in 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 condensed water in the water tank (500) and the cooking cavity (800). The process of the second stage is as follows: The second stage: controlling the first evaporator (200) to work for time t1, stop for time t2, and then work again, and repeating the cycle until time T3 and time T4; controlling the second evaporator (300) to work continuously until time T3; and then controlling the second evaporator (300) to work for time t4, stop for time t5, and then work again, and repeating the cycle until time T4.

4. The large steam internal circulation method according to claim 2 or 3, characterized in that: The t1 time is the time period when the temperature of the first evaporator (200) starts working from less than 90 degrees and stops at 120 degrees, and the t2 time is the time period when the temperature of the first evaporator (200) starts working from more than 120 degrees and cools down to 90 degrees; the t4 time is the time period when the temperature of the second evaporator (300) starts working from less than 90 degrees and stops at 120 degrees, and the t5 time is the time period when the temperature of the second evaporator (300) starts working from more than 120 degrees and cools down to 90 degrees.

5. The large steam internal circulation method according to claim 2 or 3, characterized in that: It also includes the following auxiliary temperature-injection steps: The first stage: while the first evaporator (200) and the second evaporator (300) are working, the auxiliary temperature rush is started; The second stage: in the stage of stabilizing temperature and humidity, the auxiliary temperature surge is turned off; in the stage of maintaining temperature and humidity, whether to start the auxiliary temperature surge is determined according to the temperature in the cooking cavity (800); The third stage: stop auxiliary temperature rush.

6. A large steam internal circulation system, used to implement the large steam internal circulation method according to any one of claims 1 to 5, characterized in that: The invention comprises a controller (100), a first evaporator (200), a second evaporator (300), a condensation system (400), a water tank (500) and a first water pump. The first evaporator (200), the second evaporator (300), the condensation 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 condensation system (400) condenses water vapor in a cooking cavity (800) into condensed water. The condensed water flows to the second evaporator (300) and serves as a water source for the second evaporator (300).

7. The large steam internal circulation system according to claim 6, characterized in that: It also includes a flow guiding system (600) connected to the condensation system (400), wherein the flow guiding system (600) guides the condensed water to the inner wall surface of the cooking cavity (800).

8. The large steam internal circulation system according to claim 6 or 7, 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 steam internal circulation system according to claim 6, characterized in that: It also includes an auxiliary temperature-increasing system, which is connected to the controller (100).

10. A steam oven, characterized in that: It comprises a box body (700), a cover body and a large steam internal circulation system as described in any one of claims 5 to 9, the cover body is connected to the box body (700) and a cooking cavity (800) is formed in the box body (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 box body (700).

Images