A steam cooking apparatus capable of automatically supplying and discharging water and a control method thereof

Abstract

The present application provides a kind of steam cooking equipment and its control method of automatic water feeding and discharging, the steam cooking equipment includes water storage box assembly, evaporator, cooking cavity and wastewater box assembly;Water storage box assembly includes water storage box and electromagnetic valve;Water storage box is equipped with water storage cavity, and water storage cavity is equipped with water storage inlet and water storage outlet;The water inlet end of electromagnetic valve is connected with automatic water supply pipeline, and the water outlet end of electromagnetic valve is connected with water storage inlet;Evaporator is equipped with evaporation inlet, evaporation drain and steam outlet;Cooking cavity is equipped with steam inlet and wastewater recovery cavity;Wastewater recovery cavity is equipped with cooking drain;Wastewater box assembly is equipped with wastewater cavity, and wastewater cavity is equipped with wastewater inlet;Evaporation drain, cooking drain and wastewater inlet are connected by pipeline.The present application can automatically supply water during cooking, prevent water shortage and steam interruption or excessive water addition, and additionally, residual water in the system can be emptied after cooking, to prevent bacteria growth and water quality deterioration.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to an automatic water supply and drainage steam cooking device and its control method. Background Technology

[0002] Existing cooking appliances with steam functions, such as steam ovens and integrated cooking appliances, generally use an external, independent water storage box for manual water addition and cleaning of residual water in the cooking cavity. This approach has several industry-wide technical pain points, the specific defects of which are as follows: 1. The water supply mode is outdated and the level of intelligence is low; traditional models rely entirely on manual opening of the lid to add water periodically, which can easily lead to problems such as water shortage and steam interruption or excessive water addition resulting in too much residual water during the cooking process; 2. The inability to drain residual water makes it easy for bacteria to grow and water quality to deteriorate; water tends to accumulate at the bottom of traditional water storage boxes, wastewater tends to remain in the pipes, and residual water tends to remain in the evaporator. Long-term stagnation will breed bacteria, produce scale, and deteriorate the water quality. Using stale water every time you cook will affect the hygiene of the food, and long-term scale buildup can easily cause water circuit blockage and water pump failure.

[0003] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic water supply and drainage steam cooking device, which can automatically supply water during cooking to prevent water shortage and steam interruption or excessive water addition leading to excessive residual water. In addition, the residual water in the system can be drained after cooking to prevent the growth of bacteria and water quality deterioration.

[0005] Another objective of this invention is to provide a control method for the above-mentioned automatic water supply and drainage steam cooking equipment, which can automatically supply water during cooking to prevent water shortage and steam interruption or excessive water addition leading to excessive residual water. In addition, the residual water in the system can be drained after cooking to prevent the growth of bacteria and water quality deterioration.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An automatic water supply and drainage steam cooking device includes a water storage box assembly, an evaporator, a cooking chamber, and a wastewater box assembly; The water storage box assembly includes a water storage box and a solenoid valve; the water storage box has a water storage cavity, and the water storage cavity has a water inlet and a water outlet; the inlet end of the solenoid valve is connected to an automatic water supply pipeline, and the outlet end of the solenoid valve is connected to the water inlet. The evaporator is provided with an evaporation inlet, an evaporation outlet, and a steam outlet; the evaporation inlet and the water storage outlet are connected by a pipeline. The cooking chamber is provided with a steam inlet and a wastewater recovery chamber; the steam inlet and the steam outlet are connected by a pipeline; the wastewater recovery chamber is provided with a cooking drain outlet; The wastewater box assembly is provided with a wastewater chamber, and the wastewater chamber is provided with a wastewater inlet connected to the wastewater chamber; the evaporation drain outlet, the cooking drain outlet and the wastewater inlet are connected by pipes.

[0007] According to one embodiment of the present invention, the water storage cavity is provided with a liquid level detection device.

[0008] According to one embodiment of the present invention, the outlet end of the water inlet of the water storage is provided with a water-stopping float ball, which is located inside the water storage cavity.

[0009] According to one embodiment of the present invention, a water storage drain outlet is provided at the bottom of the water storage cavity.

[0010] According to one embodiment of the present invention, the bottom surface of the water storage cavity is inclined, and the water storage drain outlet is located at the lowest point of the inclined surface.

[0011] According to one embodiment of the present invention, the water storage box is provided with a partition to divide the water storage box into a water storage cavity and an installation cavity; the solenoid valve is provided in the installation cavity, and the water inlet is provided on the partition.

[0012] According to one embodiment of the present invention, the upper part of the partition is provided with an overflow port; the bottom of the mounting cavity is provided with a detection groove, and the top of the mounting cavity is provided with a liquid detection device corresponding to the detection groove.

[0013] According to one embodiment of the present invention, the bottom surface of the mounting cavity is inclined, and the detection groove is located at the lowest point of the inclined surface.

[0014] According to one embodiment of the present invention, the water storage cavity is further provided with an external water supply inlet.

[0015] According to one embodiment of the present invention, the wastewater box assembly includes a wastewater box and a bracket; the wastewater box has a wastewater cavity, and the bracket has a wastewater inlet on its side wall; the bracket has a receiving cavity corresponding to the wastewater box, the wastewater box is slidably disposed in the receiving cavity, and the sliding direction of the wastewater box is parallel to the axial direction of the wastewater inlet; the side wall of the wastewater box has a wastewater interface corresponding to the wastewater inlet, so that when the wastewater box is slidably installed in the bracket, the wastewater inlet and the wastewater interface are inserted and connected.

[0016] According to one embodiment of the present invention, the bottom of the receiving cavity is provided with a first groove, the first groove is provided with a first slider, and the top of the first slider is provided with an upwardly extending guide post; the sliding direction of the first slider is perpendicular to the axial direction of the wastewater inlet. The bottom of the wastewater box is provided with a guide groove corresponding to the guide post; the guide groove includes a first groove, a second groove and a third groove connected in sequence; the width of the first groove gradually increases in the direction away from the second groove, and the width of the third groove gradually increases in the direction away from the second groove; a limiting block is provided in the third groove, forming an inlet groove and an outlet groove connected end to end in the third groove; the inlet groove and the outlet groove are both C-shaped and arranged opposite to each other.

[0017] According to one embodiment of the present invention, the limiting block is provided with a limiting groove on the side away from the second groove, and the limiting groove corresponds to the intersection of the inlet groove and the outlet groove.

[0018] According to one embodiment of the present invention, the bottom of the receiving cavity is further provided with a second sliding groove, the second sliding groove is provided with a second slider, and the top of the second slider is provided with an upwardly extending baffle; the sliding direction of the second slider is parallel to the axial direction of the wastewater inlet and the baffle is located on the stroke of the wastewater box; the bottom of the receiving cavity is provided with a fixing post, and the fixing post is connected to the second slider by a spring, so that the second slider is normally located in the second sliding groove away from the wastewater inlet.

[0019] According to one embodiment of the present invention, a buffer pad is provided at the end of the second chute away from the wastewater inlet.

[0020] According to one embodiment of the present invention, the bracket sidewall is provided with a micro switch, and the inner wall of the receiving cavity is provided with an elastic lever corresponding to the contact of the micro switch. When the wastewater inlet is inserted into the wastewater interface, the wastewater box sidewall squeezes the elastic lever and causes the elastic lever to abut against the contact of the micro switch.

[0021] According to one embodiment of the present invention, a wastewater box support is provided below the bracket, and a water receiving trough is provided on the top of the wastewater box support.

[0022] According to one embodiment of the present invention, a first water pump is provided in the pipeline between the evaporation inlet and the water storage outlet; a second water pump is provided in the pipeline between the evaporation outlet and the wastewater inlet; and a third water pump is provided in the pipeline between the cooking outlet and the wastewater inlet.

[0023] The present invention also provides a control method for the above-mentioned automatic water supply and drainage steam cooking equipment, comprising the following steps: A. Activate the steam cooking function and use a flow detection device to detect the flow rate in the pipe between the evaporator inlet and the water storage outlet. If the flow detection device detects flow, the evaporator is activated to begin the steam cooking process. If the flow detection device does not detect flow, the solenoid valve is opened to supply water to the water storage chamber. The solenoid valve remains open for a short period and then closes, at which point the flow detection device re-detects the flow rate in the pipe between the evaporator inlet and the water storage outlet. B. After the steam cooking process is completed, the remaining water in the evaporator and the cooking chamber is discharged into the wastewater chamber through the pipeline between the evaporation drain, the cooking drain and the wastewater inlet.

[0024] According to one embodiment of the present invention, in step A, the water level in the water storage chamber is detected by a liquid level detection device. When the liquid level detection device detects that the water level in the water storage chamber is lower than a first liquid level, the solenoid valve is controlled to open to supply water to the water storage chamber. When the liquid level detection device detects that the water level in the water storage chamber is higher than a second liquid level, the solenoid valve is controlled to close.

[0025] According to one embodiment of the present invention, in step A, a liquid detection device is used to detect the area at the bottom of the water storage box and outside the water storage cavity. When the liquid detection device detects liquid, it controls the solenoid valve to close and stops the machine with an alarm.

[0026] Compared with the prior art, the advantages and beneficial effects of the embodiments of the present invention are as follows: The automatic water supply and drainage steam cooking device and its control method provided in this invention allow for water supply to the water storage chamber during steam cooking by controlling the solenoid valve to open for a certain period of time. Compared to the prior art method of manually adding water by removing the water storage box, the steam cooking device provided by this invention can automatically supply water to the water storage box, preventing situations such as water shortage leading to steam interruption or excessive water accumulation. Furthermore, after steam cooking, residual water remains in the evaporator and cooking chamber. This residual water can be drained into the wastewater chamber through the pipe connecting the evaporator drain, the cooking drain, and the wastewater inlet, preventing bacterial growth and water quality deterioration in the cooking system, and eliminating the need for manual cleaning of the evaporator, water storage box, and cooking chamber. The automatic water supply and drainage steam cooking device provided in this invention uses an integrated water circuit assembly, with automatic water supply and centralized wastewater discharge into the wastewater chamber. Only the wastewater chamber of the wastewater box assembly needs to be cleaned, simplifying maintenance, facilitating cleaning, and improving the user experience. Attached Figure Description

[0027] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. Wherein: Figure 1 A schematic diagram of the structure of an automatic water supply and drainage steam cooking device provided in an embodiment of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 A schematic diagram of the cooking cavity of an automatic water supply and drainage steam cooking device provided in an embodiment of the present invention; Figure 4 A schematic diagram of the water flow direction of an automatic water supply and drainage steam cooking device provided in an embodiment of the present invention; Figure 5 A schematic diagram of the water storage box assembly of an automatic water supply and drainage steam cooking device provided in an embodiment of the present invention; Figure 6 Another structural schematic diagram of the water storage box assembly of the automatic water supply and drainage steam cooking device provided in an embodiment of the present invention; Figure 7 An assembly diagram of the water storage box assembly of an automatic water supply and drainage steam cooking device provided in an embodiment of the present invention; Figure 8 A schematic diagram of the structure of the water storage box of the automatic water supply and drainage steam cooking device provided in an embodiment of the present invention; Figure 9 A schematic diagram of the structure of the water storage box cover of the automatic water supply and drainage steam cooking device provided in an embodiment of the present invention; Figure 10 A schematic diagram of the wastewater box assembly of an automatic water supply and drainage steam cooking device provided in an embodiment of the present invention; Figure 11 An assembly diagram of the wastewater box assembly of an automatic water supply and drainage steam cooking device provided in an embodiment of the present invention; Figure 12 for Figure 11 Enlarged view of point B in the middle; Figure 13 This is a schematic diagram of the wastewater box assembly of the automatic water supply and drainage steam cooking equipment provided in an embodiment of the present invention from another angle. Figure 14 for Figure 13 Enlarged view of point C in the middle; Figure 15 A schematic diagram of the guide groove of the automatic water supply and drainage steam cooking device provided in an embodiment of the present invention; Figure 16 for Figure 13 Enlarged diagram of point D in the middle.

[0028] Explanation of reference numerals in the attached figures: 1. Water storage box assembly; 11. Water storage box; 111. Water storage chamber; 112. Mounting chamber; 113. Detection groove; 114. Solenoid valve mounting groove; 115. Water baffle; 116. External water supply inlet; 117. Water storage box body; 118. Water storage box cover; 1181. Wiring hole; 1182. Mounting hole; 119. Water storage box bracket; 12. Solenoid valve; 13. Water inlet; 14. Water outlet; 141. 15. L-shaped pipe; 16. Liquid level detection device; 17. Water-stop float; 18. Water storage drain outlet; 19. Liquid storage drain pipe; 2. Evaporator; 20. Evaporation inlet; 21. Evaporation drain outlet; 22. Steam outlet; 3. Cooking chamber; 32. Steam inlet; 33. Wastewater recovery chamber; 4. Cooking drain outlet; 5. Wastewater box assembly; 6. Wastewater chamber; 7. 43. Wastewater inlet; 430. Wastewater box; 431. Wastewater interface; 431. Guide groove; 4311. First groove; 4312. Second groove; 4313. Third groove; 4314. Limiting block; 4315. Inlet groove; 4316. Outlet groove; 4317. Limiting groove; 432. Wastewater box body; 433. Wastewater box cover; 434. Rubber cover; 44. Bracket; 441. Receiving cavity; 442. Elastic lever; 45. 451. First slider; 452. Guide post; 46. Second slider; 461. Second slider; 462. Baffle; 463. Fixed post; 464. Spring; 465. Buffer pad; 47. Micro switch; 48. Wastewater box bracket; 481. Water receiving trough; 49. Reinforcing plate; 5. Box body; 61. First water pump; 62. Second water pump; 63. Third water pump; 64. Flow detection device; 65. Impurity filter. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. Indeed, those skilled in the art will recognize that modifications and variations can be made to the invention without departing from its scope or spirit. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the invention encompass such modifications and variations falling within the scope of the appended claims and their equivalents.

[0030] In the description of this invention, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected," "linked," and "set up" used in this invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection through intermediate components; a wired connection, a radio connection, or a wireless communication signal connection. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0031] like Figure 1 As shown, this embodiment of the invention provides an automatic water supply and drainage steam cooking device, including a water storage box assembly 1, an evaporator 2, a cooking chamber 3, and a wastewater box assembly 4. In actual assembly, the water storage box assembly 1, the evaporator 2, the cooking chamber 3, and the wastewater box assembly 4 are assembled inside the housing 5.

[0032] like Figures 1-3 , Figure 5 , Figure 7 , Figure 10 , Figure 11 As shown, the water storage box assembly 1 includes a water storage box 11 and a solenoid valve 12. The water storage box 11 has a water storage chamber 111, which has a water inlet 13 and a water outlet 14. The inlet end of the solenoid valve 12 is connected to an automatic water supply pipeline (e.g., a direct drinking water system, a direct drinking machine, not shown in the figure), and the outlet end of the solenoid valve 12 is connected to the water inlet 13. The evaporator 2 has an evaporation inlet 21, an evaporation outlet 22, and a steam outlet 23. The evaporation inlet 21 is connected to the water outlet 14 via a pipeline. The cooking chamber 3 has a steam inlet 31 and a wastewater recovery chamber 32. The steam inlet 31 is connected to the steam outlet 23 via a pipeline, and the wastewater recovery chamber 32 has a cooking outlet 33. The wastewater box assembly 4 has a wastewater chamber 41, which has a wastewater inlet 42 connected to it. The evaporation drain outlet 22, the cooking drain outlet 33, and the wastewater inlet 42 are connected by pipes.

[0033] When using the automatic water supply and drainage steam cooking equipment provided in this embodiment of the invention, such as... Figure 4As shown in the diagram, the water flow direction is indicated by the arrow. The water storage chamber 111 contains the water required for the evaporator 2. Water enters the evaporator 2 through the pipe between the evaporator inlet 21 and the water storage outlet 14, generating steam within the evaporator 2. The steam enters the cooking chamber 3 through the pipe between the steam outlet 23 and the steam inlet 31, heating and cooking the food within the cooking chamber 3. During steam cooking, the solenoid valve 12 can be opened for a certain period of time by the controller to supply water to the water storage chamber 111. Compared to the existing technology where water is manually added by removing the water storage box, the steam cooking device provided by this invention can automatically supply water to the water storage box 11, preventing situations such as water shortage and steam interruption or excessive water addition leading to excessive residual water (the controller controls the opening and closing of the solenoid valve 12, making the water intake more precise). Furthermore, after steam cooking, residual water will remain in the evaporator 2 and the cooking chamber 3. This residual water can be drained into the wastewater chamber 41 through the pipes connecting the evaporator drain 22, the cooking drain 33, and the wastewater inlet 42, preventing bacterial growth and water quality deterioration in the cooking system. This eliminates the need for manual cleaning of the evaporator 2, the water storage box 11 (which is emptied along with the water in the evaporator 2), and the remaining water in the cooking chamber 3. Existing steam cooking equipment uses separate, decentralized structures for water purification and wastewater collection, requiring users to add water separately, empty water from multiple locations, and clean at multiple points. This cumbersome maintenance process results in many cleaning dead zones and a poor user experience. In contrast, the automatic water supply and drainage steam cooking equipment provided in this embodiment uses an integrated water circuit assembly. Water is automatically supplied, and wastewater is centrally discharged into the wastewater chamber 41. Only the wastewater chamber 41 of the wastewater box assembly 4 needs to be cleaned, simplifying maintenance, facilitating cleaning, and improving the user experience.

[0034] To facilitate water transportation, such as Figure 1 , Figure 4 As shown, in one embodiment of the present invention, a first water pump 61 is provided in the pipeline between the evaporation inlet 21 and the water storage outlet 14 to pump water from the water storage chamber 111 into the evaporator 2. A second water pump 62 is provided in the pipeline between the evaporation drain outlet 22 and the wastewater inlet 42, and a third water pump 63 is provided in the pipeline between the cooking drain outlet 33 and the wastewater inlet 42 to pump the residual water in the evaporator 2 and the cooking chamber 3 into the wastewater chamber 41. Furthermore, a flow detection device 64 (e.g., a flow meter) is also provided in the pipeline between the evaporation inlet 21 and the water storage outlet 14 to detect the amount of water entering the evaporator 2. Even further, impurity filters 65 are provided at the inlet ends of the second water pump 62 and the third water pump 63 to prevent impurities from clogging the pumps and pipelines.

[0035] like Figure 1 , Figure 2As shown, in one embodiment of the present invention, there are two wastewater inlets 42, which are respectively connected to the evaporation drain outlet 22 and the cooking drain outlet 33 through pipelines.

[0036] To control the water level in the water storage chamber 111 and further address the issues of reliance on manual judgment for water volume management, which leads to stagnant water, poor user experience, and low level of automation, such as... Figure 7 As shown, in one embodiment of the present invention, a liquid level detection device 15, such as a detection switch, is provided in the water storage chamber 111. The liquid level detection device 15 can detect the water level in the water storage chamber 111. When the water level in the water storage chamber 111 is lower than a certain level, feedback can be sent to the controller (not shown in the figure), which then controls the solenoid valve 12 to open, supplying water to the water storage chamber 111. When the water level in the water storage chamber 111 is higher than a certain level, feedback can be sent to the controller, which then controls the solenoid valve 12 to close, preventing the water level from becoming too high and overflowing outside the water storage chamber 111.

[0037] To prevent excessively high water levels in the water storage chamber 111 due to continuous water supply from the solenoid valve 12 in the event of electrical control failure such as malfunction of the controller, solenoid valve 12, or level detection device 15, such as... Figure 7 As shown, in one embodiment of the present invention, a water-stopping float 16 is provided at the outlet end of the water inlet 13, and the water-stopping float 16 is located inside the water storage chamber 111. Under normal operating conditions, the float of the water-stopping float 16 floats with the water level and does not affect the water intake; when the controller, the solenoid valve 12 fails, or the liquid level detection device 15 fails electrically, causing the water level in the water storage chamber 111 to be abnormally high, the float of the water-stopping float 16 floats up under buoyancy, physically blocking the outlet end of the water inlet 13, forcibly blocking the water intake, and preventing overflow.

[0038] like Figures 5-8 As shown, in one embodiment of the present invention, the bottom of the water storage cavity 111 is provided with a water storage drain outlet 17 for connecting an external water storage drain pipe 171 to drain all the residual water in the water storage cavity 111 when the equipment is idle or during cleaning and maintenance. Furthermore, to facilitate the drainage of residual water, the bottom surface of the water storage cavity 111 is sloped, and the water storage drain outlet 17 is located at the lowest point of the slope. Utilizing the principle of gravity flow guidance, all the residual water in the water storage cavity 111 is concentrated at the lowest point of the slope, ensuring that the water in the water storage cavity 111 can be completely drained without any residual stagnant water. Furthermore, the inlet end of the water outlet 14 (e.g., connected to the L-shaped pipe 141) is located at the lowest point of the slope, which can also allow the water in the water storage chamber 111 to be discharged into the evaporator 2 as much as possible. When steam cooking is finished or the equipment is in standby mode, the first water pump 61 draws out the water accumulated in the water storage chamber 111. With the help of the slope guiding the flow, the water in the water storage chamber 111 is completely emptied, avoiding stagnant water residue and the growth of scale and bacteria.

[0039] like Figure 7 , Figure 8 As shown, in one embodiment of the present invention, the water storage box 11 is provided with a partition 18, dividing the water storage box 11 into a water storage chamber 111 and an installation chamber 112. The solenoid valve 12 is located in the installation chamber 112, and the water inlet 13 is located on the partition 18. The solenoid valve 12 is separated from the water storage chamber 111, keeping the solenoid valve 12 away from the water and preventing it from malfunctioning due to water contact. Existing steam cooking equipment's water storage box relies on a simple single-layer sealing ring, making it difficult to detect leaks in time. To solve the above problem, in this embodiment, the partition 18 is provided with an overflow port 181 at its upper part. When the water level in the water storage chamber 111 is too high and reaches the overflow port 181, water flows from the overflow port 181 into the installation chamber 112. The bottom of the installation chamber 112 is provided with a detection groove 113, and the top of the installation chamber 112 is provided with a liquid detection device 19 corresponding to the detection groove 113, such as a liquid sensor. The liquid detection device 19 can detect whether there is abnormal water accumulation in the detection groove 113 in real time. Once water accumulation is detected, it indicates that the water level in the water storage chamber 111 is too high and has flowed into the mounting chamber 112 through the overflow port 181. At this time, a signal is immediately transmitted to the controller, triggering the fault report and steam lock-up functions of the whole machine, reminding the user to perform maintenance. Furthermore, in order to facilitate timely detection of liquid flowing into the mounting chamber 112, the bottom surface of the mounting chamber 112 is inclined, and the detection groove 113 is located at the lowest point of the inclined surface. Utilizing the principle of gravity flow guidance, the water overflowing into the mounting chamber 112 is quickly gathered into the detection groove 113, which facilitates timely detection of overflow.

[0040] The automatic water supply and drainage steam cooking equipment provided in this embodiment of the invention employs a four-tiered progressive protection system in its water storage box assembly 1, which combines electronic intelligent water control, closed-loop water level detection, mechanical physical water sealing, and leakage self-detection alarm. This multi-layered protection completely eliminates the risk of leakage, achieving a protection level far superior to traditional single-layer sealing structures. First layer: Controller electrical protection The steam cooking equipment has a preset rated water storage capacity. The controller intelligently outputs control signals according to the steam working requirements of the evaporator 2, and precisely controls the opening and closing of the solenoid valve 12 to replenish water as needed, thus avoiding problems such as insufficient water supply, excessive water intake, and water level exceeding the standard from the source. Second layer: Closed-loop protection of liquid level detection device The liquid level detection device 15 monitors the water level in the water storage chamber 111 in real time and feeds the water level signal back to the controller in real time. When the water level reaches the rated full water height, the solenoid valve 12 is forcibly triggered to shut off and stop water replenishment. When the water level is lower than the working threshold, water replenishment is automatically triggered to form a closed-loop water control and solve the problem of uncontrolled water volume when adding water manually. Third layer: Mechanical and physical protection from the water-stopping float. As a fallback protection after the failure of electrical components, when the liquid level detection device 15 malfunctions or the solenoid valve 12 is stuck and cannot cut off the power, and the electrical control system completely fails, the water level continues to rise, causing the float of the water-stopping float ball 16 to float up, physically blocking the water inlet 13, forcibly cutting off the water intake, avoiding the problem of continuous overflow and flooding caused by the failure of electrical control. The purely mechanical structure is stable and reliable, with no risk of circuit failure. Fourth layer: Leakage detection and alarm protection By collecting all abnormal water bodies, such as leakage from the solenoid valve 12, overflow from the water storage chamber 111, and leakage from the seal, within the installation cavity 112, the water eventually converges into the detection groove 113. The liquid detection device 19 monitors the water accumulation status in real time. Once an abnormal leak is detected, it immediately feeds back to the controller to trigger a whole-machine error and fault indication. At the same time, it locks the steam operation program to prevent water leakage from causing electrical faults, thus achieving proactive fault warning.

[0041] like Figure 8 As shown, in one embodiment of the present invention, the mounting cavity 112 is provided with a solenoid valve mounting groove 114, which surrounds the solenoid valve 12 to prevent water overflowing into the solenoid valve mounting groove 114 from contacting the solenoid valve 12 and to collect water leakage caused by the failure of the solenoid valve 12's seal. Furthermore, the mounting cavity 112 is provided with multiple baffles 115, dividing the mounting cavity 112 into multiple water-blocking grooves. By setting the height of the baffles 115 to be lower than the height of the solenoid valve mounting groove 114, the baffles 115 can achieve zoned water guidance, allowing leakage in the solenoid valve mounting groove 114 to flow unidirectionally into the detection groove 113, eliminating water accumulation dead zones.

[0042] like Figures 6-8 As shown, in one embodiment of the present invention, the water storage chamber 111 is further provided with an external water supply inlet 116. This external water supply inlet 116 is different from the direct drinking water system connected to the water storage inlet 13. It is used for manual replenishment of water from an external water source in scenarios where direct drinking water is unavailable. For example, it can be manually replenished by connecting to tap water, purified water, or other water sources via a water pipe. This is suitable for ordinary home decoration scenarios, making the equipment more adaptable. The direct drinking water source is automatically replenished through the solenoid valve 12, while the external water source is manually replenished through the external water supply inlet 116. The two water paths do not interfere with each other, adapting to different usage scenarios.

[0043] like Figures 5-9As shown, in one embodiment of the present invention, the water storage box 11 includes a water storage box body 117 and a water storage box cover 118. To improve sealing performance, a sealing groove with a sealing ring is provided at the connection between the water storage box body 117 and the water storage box cover 118. Furthermore, the water storage box body 117 and the water storage box cover 118 are connected by a snap-fit ​​mechanism, enabling quick and easy assembly without the need for screws. This facilitates assembly and ensures uniform sealing pressure, preventing localized sealing defects. Additionally, the water storage box cover 118 may be provided with a wiring hole 1181 for the liquid level detection device 15 and a mounting hole 1182 for mounting the liquid detection device 19. The mounting hole 1182 corresponds to the detection groove 113.

[0044] like Figures 5-7 As shown, in one embodiment of the present invention, the water storage box assembly 1 further includes a water storage box bracket 119, which serves as an integral load-bearing and fixing structure for locking and fixing the water storage box assembly 1 to the internal frame of the housing 5, thereby achieving built-in concealed installation.

[0045] like Figures 10-11 As shown, in one embodiment of the present invention, the wastewater box assembly 4 includes a wastewater box 43 and a bracket 44. The wastewater box 43 has a wastewater chamber 41, and the bracket 44 has a wastewater inlet 42 on its side wall. The bracket 44 has a receiving cavity 441 corresponding to the wastewater box 43, and the wastewater box 43 is slidably disposed within the receiving cavity 441, with the sliding direction of the wastewater box 43 parallel to the axial direction of the wastewater inlet 42. The side wall of the wastewater box 43 has a wastewater interface 430 corresponding to the wastewater inlet 42, so that when the wastewater box 43 is slidably installed in the bracket 44, the wastewater inlet 42 and the wastewater interface 430 are inserted and connected. After the steam cooking process is completed, the wastewater box 43 can be pulled out from the bracket 44 to empty the wastewater in the wastewater chamber 41 and clean the wastewater chamber 41. Then, the wastewater box 43 is reinserted into the bracket 44, and the wastewater inlet 42 is connected to the wastewater interface 430, awaiting the next cooking process. In this embodiment, the wastewater interface 430 is a rubber plug, which is easy to insert into the wastewater inlet 42 and maintains a seal.

[0046] Traditional steam cooking equipment uses a simple plug-and-play snap-on structure for the water tank, lacking positioning guidance and locking mechanisms during assembly. To address these issues, such as... Figures 12-15As shown, in one embodiment of the present invention, the bottom of the receiving cavity 441 is provided with a first sliding groove 45, a first slider 451 is provided in the first sliding groove 45, and an upwardly extending guide post 452 is provided at the top of the first slider 451. The sliding direction of the first slider 451 is perpendicular to the axial direction of the wastewater inlet 42. The bottom of the wastewater box 43 is provided with a guide groove 431 corresponding to the guide post 452. The guide groove 431 includes a first groove 4311, a second groove 4312, and a third groove 4313 connected in sequence. The width of the first groove 4311 gradually increases in the direction away from the second groove 4312, and the width of the third groove 4313 gradually increases in the direction away from the second groove 4312. A limiting block 4314 is provided in the third groove 4313, and an inlet groove 4315 and an outlet groove 4316 connected end to end are formed in the third groove 4313. The inlet groove 4315 and the outlet groove 4316 are both C-shaped and arranged opposite to each other. During the insertion of the wastewater box 43 into the bracket 44, relative movement occurs between them. Constrained by the inner wall of the guide groove 431, the guide post 452 first enters the first groove 4311, then proceeds along the second groove 4312 into the inlet groove 4315 of the third groove 4313. At the end of the inlet groove 4315, it moves towards the limiting block 4314, abutting against it and preventing the guide post 452 from moving towards the second groove 4312. At this point, the wastewater inlet 42 and the wastewater interface 430 are securely connected, allowing wastewater to be discharged into the wastewater chamber 41. When it is necessary to remove the wastewater box 43, first push the wastewater box 43 toward the wastewater inlet 42. The guide post 452 enters the outlet groove 4316 of the third groove 4313. Then pull the wastewater box 43 away from the wastewater inlet 42. Under the restriction of the inner wall of the guide groove 431, the guide post 452 passes through the outlet groove 4316, the second groove 4312, and the first groove 4311 in sequence and slides out of the guide groove 431, so that the wastewater box 43 can be removed. During this process, the guide post 452 and the guide groove 431 create a positioning and guiding effect, which allows the wastewater box 43 to slide smoothly and the wastewater inlet 42 to be precisely connected with the wastewater interface 430. In addition, the guide post 452 and the guide groove 431 also create a locking and anti-loosening effect. Through the abutment between the guide post 452 and the limiting block 4314, the wastewater box 43 can be restricted from moving away from the wastewater inlet 42, thereby preventing the wastewater inlet 42 from becoming loose from the wastewater interface 430.

[0047] To prevent the wastewater box 43 from becoming loose or displaced due to operational vibrations, such as Figure 15As shown, in one embodiment of the present invention, the limiting block 4314 has a limiting groove 4317 on the side away from the second groove 4312, and the limiting groove 4317 corresponds to the intersection of the inlet groove 4315 and the outlet groove 4316. In this embodiment, the guide post 452 can fall into the limiting groove 4317 to prevent the guide post 452 from slipping off the limiting block 4314.

[0048] To further prevent the wastewater box 43 from becoming loose or displaced due to operational vibrations, such as Figures 11-13 , Figure 16 As shown, in one embodiment of the present invention, the bottom of the receiving cavity 441 is further provided with a second sliding groove 46, and a second slider 461 is provided in the second sliding groove 46. The top of the second slider 461 is provided with an upwardly extending baffle 462. The sliding direction of the second slider 461 is parallel to the axial direction of the wastewater inlet 42, and the baffle 462 is located on the sliding stroke of the wastewater box 43. The bottom of the receiving cavity 441 is provided with a fixing post 463, and the fixing post 463 is connected to the second slider 461 by a spring 464, so that the second slider 461 is normally located in the second sliding groove 46 away from the wastewater inlet 42. In this embodiment, during the process of inserting the wastewater box 43 into the receiving cavity 441, the baffle 462 is pushed towards the wastewater inlet 42, and finally the wastewater box 43 is inserted into place and the guide post 452 abuts against the limiting block 4314. At this time, under the action of the spring 464, the baffle 462 exerts a force on the wastewater box 43 in a direction away from the wastewater inlet 42, so that the guide post 452 and the limiting block 4314 always maintain an interaction force, which can prevent them from becoming loose, and thus prevent the wastewater box 43 from becoming loose from the bracket 44. When it is necessary to remove the wastewater box 43, simply push the wastewater box 43 towards the wastewater inlet 42, and then, under the action of the baffle 462 and the spring 464, the wastewater box 43 can pop out in a direction away from the wastewater inlet 42, making it easy for the user to remove the wastewater box 43. At this time, the second slider 461 slides to the end of the second slide groove 46 away from the wastewater inlet 42 under the action of the spring 464. In order to reduce noise, the end of the second slide groove 46 away from the wastewater inlet 42 is provided with a buffer pad 465 to buffer the second slider 461 and avoid hard contact that will cause abnormal noise and impact wear.

[0049] Traditional steam cooking equipment uses a simple plug-and-play snap-on structure for the water tank, lacking a proper alignment detection function. Figures 10-12As shown, in one embodiment of the present invention, in order to determine whether the wastewater box 43 has slid into place and whether the wastewater interface 430 and the wastewater inlet 42 are properly connected, a micro switch 47 is provided on the side wall of the bracket 44, and an elastic lever 442 corresponding to the contact of the micro switch 47 is provided on the inner wall of the receiving cavity 441. When the wastewater inlet 42 is connected to the wastewater interface 430, the side wall of the wastewater box 43 presses the elastic lever 442 and causes the elastic lever 442 to abut against the contact of the micro switch 47. The micro switch 47 generates a signal and transmits it to the controller, which provides feedback that the wastewater box 43 has slid into place and the wastewater interface 430 and the wastewater inlet 42 are properly connected. Only then can the steam cooking program be started, realizing the interlock control to prevent accidental program start.

[0050] like Figures 10-11 , Figure 13 As shown, in one embodiment of the present invention, a wastewater box bracket 48 is provided below the bracket 44, and a water receiving groove 481 is provided on the top of the wastewater box bracket 48. The wastewater box bracket 481 is a fixed support structure for the wastewater box assembly 4, and the water receiving groove 481 on the top is used to catch accidentally spilled wastewater, preventing wastewater from flowing into the machine body and protecting the circuit and internal components.

[0051] like Figure 3 As shown, in one embodiment of the present invention, the box 5 is provided with an opening corresponding to the wastewater box 43, for pulling out the wastewater box 43, emptying the wastewater and cleaning the wastewater box 43.

[0052] like Figures 10-11 , Figure 13 As shown, in one embodiment of the present invention, the wastewater box 43 includes a wastewater box body 432 and a wastewater box cover 433. The wastewater box cover 433 is provided with a rubber cap 434, which can be directly lifted to pour out the internal wastewater through the drain outlet below the rubber cap 434; or the wastewater box cover 433 can be completely disassembled to thoroughly wash and clean the internal cavity, making the operation convenient.

[0053] like Figures 10-11 As shown, in one embodiment of the present invention, the upper part of the bracket 44 adopts an open structure design. In order to improve the structural strength of the bracket 44, a reinforcing plate 49 is provided on the top of the bracket 44, which serves to support and prevent deformation, and avoid problems such as deformation under long-term stress and misalignment during installation.

[0054] The automatic water supply and drainage steam cooking equipment provided in this embodiment of the invention has the following advantages: 1. The water storage box assembly 1 is locked and fixed inside the steam cooking equipment box 5 by the water storage box bracket 119, and is completely hidden inside the box 5. This eliminates the traditional external exposed structure, has no exposed structure, does not occupy the external space of the equipment, and the appearance of the whole machine is flat and uniform, which greatly improves the product's appearance integration and cleanliness.

[0055] 2. The water storage box component 1 uses a liquid level detection device and electronic control for automatic water replenishment to precisely control the water volume in the water storage chamber, completely solving the problems of insufficient water supply and excessive water accumulation in the water storage chamber 111. After each steam cooking program ends, the equipment automatically starts the residual water drainage program, which continuously pumps out the water accumulated at the lowest point of the water storage chamber 111. Combined with the bottom gravity guide slope structure, all residual water in the water storage chamber 111 can be completely pumped out, ensuring that there is no water accumulation in the water storage chamber 111 when the equipment is stopped. This eliminates the problems of stagnant water residue, scale growth, and water deterioration, ensuring clean steam water quality and improving cooking safety.

[0056] 3. The water storage box component 1 breaks through the traditional single-layer sealing protection mode and adopts four progressive protections: electrical control, liquid level detection, mechanical and leakage detection. It covers all abnormal working conditions such as normal operation, electrical failure, local water seepage and excessive water overflow, and completely eliminates the risk of water leakage, avoids equipment short circuit, corrosion and burn-out failures, and reduces equipment repair rate and safety risks.

[0057] 4. The water storage box component 1 is compatible with both automatic drinking water supply and manual water supply from external water sources. It can be adapted to different scenarios such as high-end smart home decoration, ordinary household and commercial use, and is compatible with all built-in and countertop cooking equipment with steaming function. The product has higher versatility and expandability.

[0058] 5. The water storage box component 1 adopts a modular integrated design with snap-fit ​​assembly, which is simple in structure and does not require complex fasteners, resulting in high production and assembly efficiency. At the same time, the drainage and maintenance structure is clear, making it convenient for subsequent scale cleaning, component maintenance, and fault diagnosis, thus reducing production and after-sales costs.

[0059] 6. The water storage box component 1 can realize automatic water replenishment, water level self-adaptation, leakage self-detection, and active fault reporting functions, which eliminates the limitations of manual intervention, adapts to the fully automatic use needs of smart homes, and greatly improves the product's intelligence level and market competitiveness.

[0060] 7. The wastewater box assembly 4 collects the residual water from the cooking cavity 3, the residual water from the evaporator 2, the residual water from the water storage box 11, and the water accumulated in the pipes through the wastewater box 43, which completely solves the problem of scattered wastewater residue and multiple cleaning points in existing steam cooking equipment. Users only need to disassemble the wastewater box 43 once to complete the cleaning of all wastewater. The operation is simple and the cleaning is thorough.

[0061] 8. The wastewater box assembly 4 uses a rubber plug to precisely seal and connect with the wastewater inlet 42 through the wastewater interface 430, which can prevent water backflow and leakage; combined with the bottom support design of the water receiving trough 481 on the top of the wastewater box bracket 48, it forms a double waterproof protection, completely preventing wastewater from entering the equipment, protecting the internal electrical components, and reducing the probability of failure.

[0062] 9. The wastewater box assembly 4 achieves precise positioning and secure locking of the wastewater box 43 through the precise cooperation of the guide post 452 and the guide groove 431, without loosening or displacement during operation; the secondary push-to-unlock and spring-automatic pop-out structure design eliminates the traditional stuck plug-and-play structure, making disassembly and assembly easy and effortless, while the buffer pad 465 can prevent impact noise and component wear, extending service life.

[0063] 10. The wastewater box assembly 4 is equipped with a micro switch 47 to detect the position of the wastewater box 43. This prevents the equipment from starting the self-cleaning and steam programs if the wastewater box 43 is not installed in place. This effectively avoids safety and quality problems such as wastewater leakage, water immersion in the machine body, short circuit, and mold growth caused by the wastewater box 43 being loose or not installed. The safety of equipment operation is significantly improved.

[0064] 11. The bracket 44 of the wastewater box assembly 4 is equipped with a reinforcing plate 49 for structural reinforcement, which can effectively prevent deformation and misalignment caused by long-term disassembly and assembly stress. The components have high precision in fit, and the overall structure is more stable and durable.

[0065] 12. This wastewater box component 4 integrates multiple functions such as wastewater collection, waterproof sealing, positioning detection, locking and anti-loosening, automatic disassembly, and leak-proof storage. It has a compact structure and strong adaptability, and can be widely used in various cooking equipment with steaming functions such as steam ovens, integrated stoves, and integrated cooking centers. It has extremely high versatility and product compatibility.

[0066] The present invention also provides a control method for the above-mentioned automatic water supply and drainage steam cooking equipment, comprising the following steps: A. The steam cooking function is activated, and the flow rate in the pipeline between the evaporator inlet 21 and the water storage outlet 14 is detected by the flow detection device 64 (e.g., a flow meter). If the flow detection device 64 detects the flow rate, the evaporator 2 is activated to perform the steam cooking process. If the flow detection device 64 does not detect the flow rate, the solenoid valve 12 is opened to supply water to the water storage chamber 111. The solenoid valve 12 remains open for a first time (e.g., 5 seconds) and then closes. The flow detection device 64 then re-detects the flow rate in the pipeline between the evaporator inlet 21 and the water storage outlet 14. B. After the steam cooking process is completed, the remaining water in the evaporator 2 and the cooking chamber 3 is discharged into the wastewater chamber 41 through the pipeline between the evaporation drain 22, the cooking drain 33 and the wastewater inlet 42, for example by pumping for a second time (e.g. 1 minute), and then the controller prompts to clean the wastewater box 43.

[0067] In one embodiment of the present invention, in step A, the water level in the water storage chamber 111 is detected by the liquid level detection device 15. When the liquid level detection device 15 detects that the water level in the water storage chamber 111 is lower than the first liquid level, it controls the solenoid valve 12 to open and supply water to the water storage chamber 111; when the liquid level detection device 15 detects that the water level in the water storage chamber 111 is higher than the second liquid level, it controls the solenoid valve 12 to close; the first liquid level is lower than the second liquid level. In this embodiment, if the liquid level detection device 15 detects that the water level in the water storage chamber 111 is lower than the first liquid level after the solenoid valve 12 has been open for a third time (e.g., 1 minute), the controller controls the steam cooking equipment to stop and alarm. If the flow detection device 64 does not detect water volume, but the liquid level detection device 15 detects that the water level in the water storage chamber 111 is higher than the first liquid level, the controller controls the steam cooking equipment to stop and alarm.

[0068] In one embodiment of the present invention, in step A, the liquid detection device 19 detects the area at the bottom of the water storage box 11 and outside the water storage cavity 111. When the liquid detection device 19 detects liquid, it controls the solenoid valve 12 to close and stops the machine with an alarm.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic water supply and drainage steam cooking device, characterized in that, It includes a water storage box assembly (1), an evaporator (2), a cooking chamber (3), and a wastewater box assembly (4); The water storage box assembly (1) includes a water storage box (11) and a solenoid valve (12); the water storage box (11) is provided with a water storage chamber (111), the water storage chamber (111) is provided with a water inlet (13) and a water outlet (14); the inlet end of the solenoid valve (12) is connected to an automatic water supply pipeline, and the outlet end of the solenoid valve (12) is connected to the water inlet (13); The evaporator (2) is provided with an evaporation inlet (21), an evaporation outlet (22), and a steam outlet (23); the evaporation inlet (21) and the water storage outlet (14) are connected by a pipeline; The cooking chamber (3) is provided with a steam inlet (31) and a wastewater recovery chamber (32); the steam inlet (31) and the steam outlet (23) are connected by a pipeline; the wastewater recovery chamber (32) is provided with a cooking drain outlet (33); The wastewater box assembly (4) is provided with a wastewater chamber (41), and the wastewater chamber (41) is provided with a wastewater inlet (42) connected to the wastewater chamber (41); the evaporation drain (22), the cooking drain (33) and the wastewater inlet (42) are connected by pipelines.

2. The automatic water supply and drainage steam cooking device according to claim 1, characterized in that, The water storage chamber (111) is equipped with a liquid level detection device (15).

3. The automatic water supply and drainage steam cooking device according to claim 1, characterized in that, The outlet end of the water inlet (13) is provided with a water-stopping float (16), which is located inside the water storage cavity (111).

4. The automatic water supply and drainage steam cooking device according to claim 1, characterized in that, The bottom of the water storage chamber (111) is provided with a water storage drain outlet (17).

5. The automatic water supply and drainage steam cooking device according to claim 4, characterized in that, The bottom surface of the water storage cavity (111) is inclined, and the water storage drain (17) is located at the lowest point of the inclined surface.

6. The automatic water supply and drainage steam cooking device according to claim 1, characterized in that, The water storage box (11) is provided with a partition (18) inside, which divides the water storage box (11) into a water storage cavity (111) and an installation cavity (112); the solenoid valve (12) is located in the installation cavity (112), and the water inlet (13) is located on the partition (18).

7. The automatic water supply and drainage steam cooking device according to claim 6, characterized in that, The upper part of the partition (18) is provided with an overflow port (181); the bottom of the mounting cavity (112) is provided with a detection groove (113), and the top of the mounting cavity (112) is provided with a liquid detection device (19) corresponding to the detection groove (113).

8. The automatic water supply and drainage steam cooking device according to claim 7, characterized in that, The bottom surface of the mounting cavity (112) is inclined, and the detection groove (113) is located at the lowest point of the inclined surface.

9. The automatic water supply and drainage steam cooking device according to claim 1, characterized in that, The water storage chamber (111) is also provided with an external water supply inlet (116).

10. The automatic water supply and drainage steam cooking device according to claim 1, characterized in that, The wastewater box assembly (4) includes a wastewater box (43) and a bracket (44); the wastewater box (43) is provided with a wastewater cavity (41), and the side wall of the bracket (44) is provided with a wastewater inlet (42); the bracket (44) is provided with a receiving cavity (441) corresponding to the wastewater box (43), the wastewater box (43) is slidably disposed in the receiving cavity (441), and the sliding direction of the wastewater box (43) is parallel to the axial direction of the wastewater inlet (42); the side wall of the wastewater box (43) is provided with a wastewater interface (430) corresponding to the wastewater inlet (42), so that when the wastewater box (43) is slidably installed in the bracket (44), the wastewater inlet (42) and the wastewater interface (430) are inserted and connected.

11. The automatic water supply and drainage steam cooking device according to claim 10, characterized in that, The bottom of the receiving cavity (441) is provided with a first sliding groove (45), and a first slider (451) is provided in the first sliding groove (45). The top of the first slider (451) is provided with an upwardly extending guide post (452); the sliding direction of the first slider (451) is perpendicular to the axis of the wastewater inlet (42). The bottom of the wastewater box (43) is provided with a guide groove (431) corresponding to the guide post (452); the guide groove (431) includes a first groove (4311), a second groove (4312) and a third groove (4313) connected in sequence; the width of the first groove (4311) gradually increases in the direction away from the second groove (4312), and the width of the third groove (4313) gradually increases in the direction away from the second groove (4312); a limiting block (4314) is provided in the third groove (4313), and an inlet groove (4315) and an outlet groove (4316) connected end to end are formed in the third groove (4313); the inlet groove (4315) and the outlet groove (4316) are both C-shaped and arranged opposite to each other.

12. The automatic water supply and drainage steam cooking device according to claim 11, characterized in that, The limiting block (4314) has a limiting groove (4317) on the side away from the second groove (4312), and the limiting groove (4317) corresponds to the intersection of the inlet groove (4315) and the outlet groove (4316).

13. The automatic water supply and drainage steam cooking device according to claim 11, characterized in that, The bottom of the receiving cavity (441) is also provided with a second slide groove (46), and a second slider (461) is provided in the second slide groove (46). The top of the second slider (461) is provided with an upwardly extending baffle (462). The sliding direction of the second slider (461) is parallel to the axial direction of the wastewater inlet (42) and the baffle (462) is located on the stroke of the wastewater box (43). The bottom of the receiving cavity (441) is provided with a fixing column (463), and the fixing column (463) is connected to the second slider (461) by a spring (464) so ​​that the second slider (461) is normally located in the second slide groove (46) away from the wastewater inlet (42).

14. The automatic water supply and drainage steam cooking device according to claim 13, characterized in that, The second chute (46) is provided with a buffer pad (465) at the end away from the wastewater inlet (42).

15. The automatic water supply and drainage steam cooking device according to claim 10, characterized in that, The bracket (44) has a micro switch (47) on its side wall, and the inner wall of the receiving cavity (441) has an elastic lever (442) corresponding to the contact of the micro switch (47). When the wastewater inlet (42) is inserted into the wastewater interface (430), the side wall of the wastewater box (43) squeezes the elastic lever (442) and makes the elastic lever (442) abut against the contact of the micro switch (47).

16. The automatic water supply and drainage steam cooking device according to claim 10, characterized in that, The bracket (44) is provided with a wastewater box support (48) below it, and a water receiving trough (481) is provided on the top of the wastewater box support (48).

17. The automatic water supply and drainage steam cooking device according to any one of claims 1 to 16, characterized in that, The pipeline between the evaporation inlet (21) and the water storage outlet (14) is equipped with a first water pump (61); the pipeline between the evaporation outlet (22) and the wastewater inlet (42) is equipped with a second water pump (62); and the pipeline between the cooking outlet (33) and the wastewater inlet (42) is equipped with a third water pump (63).

18. A control method for an automatic water supply and drainage steam cooking device according to any one of claims 1 to 17, characterized in that, Includes the following steps: A. Activate the steam cooking function and use a flow detection device to detect the flow rate in the pipeline between the evaporation inlet (21) and the water storage outlet (14). If the flow detection device detects the flow rate, activate the evaporator (2) to perform the steam cooking process. If the flow detection device does not detect the flow rate, control the solenoid valve (12) to open and supply water to the water storage chamber (111). After the solenoid valve (12) remains open for a first time, it closes, and the flow detection device re-detects the flow rate in the pipeline between the evaporation inlet (21) and the water storage outlet (14). B. After the steam cooking process is completed, the remaining water in the evaporator (2) and the cooking cavity (3) is discharged into the wastewater cavity (41) through the pipeline between the evaporation drain (22), the cooking drain (33) and the wastewater inlet (42).

19. The control method for the automatic water supply and drainage steam cooking equipment according to claim 18, characterized in that, In step A, the water level in the water storage chamber (111) is detected by the liquid level detection device (15). When the liquid level detection device (15) detects that the water level in the water storage chamber (111) is lower than the first liquid level, the solenoid valve (12) is controlled to open to supply water to the water storage chamber (111). When the liquid level detection device (15) detects that the water level in the water storage chamber (111) is higher than the second liquid level, the solenoid valve (12) is controlled to close.

20. The control method for the automatic water supply and drainage steam cooking equipment according to claim 18, characterized in that, In step A, the liquid detection device (19) detects the area at the bottom of the water storage box (11) and outside the water storage cavity (111). When the liquid detection device (19) detects liquid, it controls the solenoid valve (12) to close and stops the machine with an alarm.

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