Steam system and control method

Abstract

The present application provides a steam system and a control method, the steam system comprises: a steam generator and an inner container, the steam generator is used for generating steam; a steam pipe is arranged on the inner container, one end of the steam pipe is connected with the steam generator; a flow resistance member is arranged at the other end of the steam pipe, at least part of the flow resistance member is arranged opposite and spaced apart from the steam outlet of the steam pipe, a flow resistance channel is formed between the flow resistance member and at least part of the steam pipe, the flow resistance channel is communicated with the cavity of the inner container, so that the steam in the steam pipe enters the cavity of the inner container through the flow resistance channel. Through the technical scheme provided by the present application, the technical problem of large noise of the steam system in the prior art can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steam systems, in particular to a steam system and a control method. BACKGROUND

[0002] At present, most of the embedded steam ovens on the market use water boiling type steam generators, but the water boiling type steam generator has obvious disadvantages, such as large power, high energy consumption, and many condensate water in the inner container after steaming, etc. The instant steam generator can solve the above problems.

[0003] However, the instant steam generator also has obvious disadvantages. When the instant steam generator works, the high-temperature and high-pressure steam generated by the steam generator. In this way, the high-temperature and high-pressure steam will cause impact or disturbance to the surrounding air during the process of being injected into the atmosphere, thereby generating relatively large jet noise, which will affect the user's experience to some extent. SUMMARY

[0004] The main purpose of the present application is to provide a steam system and a control method to solve the technical problem of large noise of the steam system in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a steam system is provided, comprising:

[0006] a steam generator and an inner container, the steam generator is used for generating steam;

[0007] a steam pipe fitting, which is provided on the inner container, one end of the steam pipe fitting is connected with the steam generator;

[0008] a flow resistance member, which is provided at the other end of the steam pipe fitting, at least part of the flow resistance member is oppositely and spacedly arranged with the steam outlet of the steam pipe fitting, a flow resistance channel is formed between the flow resistance member and at least part of the steam pipe fitting, the flow resistance channel is communicated with the cavity of the inner container, so that the steam in the steam pipe fitting enters into the cavity of the inner container through the flow resistance channel.

[0009] Further, the flow resistance member comprises an annular shell, the annular shell is sleeved on the other end of the steam pipe fitting, one part of the annular shell is connected with the steam pipe fitting, and the other part of the annular shell is oppositely and spacedly arranged with the steam outlet to form the flow resistance channel.

[0010] Further, the flow resistance member further comprises an end plate, the end plate is connected with the annular shell and located at the end of the annular shell, the end plate is oppositely arranged with one end of the flow resistance channel to block one end of the flow resistance channel.

[0011] Further, the annular shell has a first port and a second port arranged oppositely, the first port is sleeved on the other end of the steam pipe, and the second port is located at the end of the other end of the steam pipe;

[0012] The end plate is arranged at the first port, and the end plate is an annular plate structure, an inner ring of the end plate is matched with an outer shape of the steam pipe to block a gap between the annular shell and the steam pipe, so that the steam in the flow resistance channel flows out through the second port; or,

[0013] The end plate is arranged at the second port and blocks the second port, so that the steam in the flow resistance channel flows out through the first port.

[0014] Further, the first port is located on one side of the second port close to an inner tank wall of the inner tank; and / or,

[0015] The steam pipe comprises a steam inlet pipe and a steam joint connected to each other, the steam joint is arranged on the inner tank, the steam inlet pipe is detachably connected to the steam joint, the steam inlet pipe is arranged outside the inner tank, one end of the steam inlet pipe away from the steam joint forms one end of the steam pipe, and one end of the steam joint away from the steam inlet pipe forms the other end of the steam pipe.

[0016] Further, a part of the annular shell is provided with a spoiler, and the spoiler is arranged on one side of the annular shell close to the steam outlet.

[0017] Further, the steam pipe comprises a steam joint, the steam joint is arranged on the inner tank, the steam joint arranged in the inner tank is provided with a first external thread and a steam outlet, the steam outlet and the first external thread are arranged along the circumferential direction of the steam joint arranged in the inner tank, the flow resistance member is provided with a first internal thread matched with the first external thread, and the flow resistance member is connected to the steam joint arranged in the inner tank through the thread connection.

[0018] Further, the steam joint arranged in the inner tank comprises an avoiding surface and a matching surface connected to each other along the annular outer edge of the steam joint, the avoiding surface is arranged opposite to and spaced apart from at least part of the flow resistance member, the avoiding surface is provided with the steam outlet, and the matching surface is provided with the first external thread.

[0019] The avoiding surfaces are at least two, and the avoiding surfaces are arranged at intervals along the annular outer edge of the steam joint. The matching surfaces are at least two, and one matching surface is arranged between adjacent two avoiding surfaces. The steam outlets are arranged on each avoiding surface, and the first external threads are arranged on each matching surface.

[0020] The avoiding surfaces are two, and the avoiding surfaces are arranged at intervals along the annular outer edge of the steam joint. The matching surfaces are two, and one matching surface is arranged between the two avoiding surfaces. The steam outlets are arranged on each avoiding surface, and the first external threads are arranged on each matching surface. The two avoiding surfaces and the two matching surfaces are connected to form a waist-shaped outer edge.

[0021] Further, the steam system further comprises:

[0022] The sealing member is arranged between the steam pipe and the inner container.

[0023] Further, the steam pipe is provided with a limiting protrusion. The steam system further comprises:

[0024] The adjusting member is arranged on the steam pipe and is arranged at intervals with the limiting protrusion in the extension direction of the steam pipe. The adjusting member protrudes from the outer edge of the steam pipe. The sealing member is arranged between the limiting protrusion and the adjusting member. The two ends of the sealing member are used to contact the limiting protrusion and the adjusting member respectively.

[0025] According to another aspect of the present application, a control method is provided, which is suitable for the steam system provided above. The control method comprises:

[0026] Adding initial water into the steam generator of the steam system;

[0027] Controlling the steam generator to enter a heating cycle process. In the heating cycle process, the working condition of the steam generator and / or the water adding condition of the steam generator are controlled according to the temperature of the steam generator. The steam generated by the steam generator is introduced into the cavity of the inner container of the steam system.

[0028] Further, the controlling the working condition of the steam generator and / or the water adding condition of the steam generator in the heating cycle process according to the temperature of the steam generator comprises:

[0029] Starting the steam generator;

[0030] Obtaining the temperature of the steam generator;

[0031] controlling the steam generator to stop working when the temperature of the steam generator is greater than or equal to a first preset temperature, and adding additional water into the steam generator;

[0032] controlling the steam generator to continue working when the temperature of the steam generator is less than the first preset temperature.

[0033] Further, the adding of the initial water into the steam generator of the steam system comprises: controlling the water inlet amount of the initial water in the steam generator to be a first water inlet amount;

[0034] the adding of the additional water into the steam generator comprises: controlling the water inlet amount of the additional water in the steam generator to be a second water inlet amount;

[0035] wherein the second water inlet amount is greater than the first water inlet amount.

[0036] Further, the adding of the initial water into the steam generator of the steam system comprises: controlling the water inlet amount of the initial water in the steam generator to be a first water inlet amount;

[0037] the adding of the additional water into the steam generator comprises: controlling the water inlet amount of the additional water in the steam generator to be a second water inlet amount;

[0038] wherein the first preset time length is less than the second preset time length.

[0039] Further, the first preset temperature is between 120°C and 200°C; and / or,

[0040] the first preset time length is between 1s and 3s; and / or,

[0041] the second preset time length is between 2s and 4s.

[0042] Further, the control method further comprises:

[0043] obtaining the temperature of the cavity of the inner container;

[0044] controlling the working condition of the heating element for heating the cavity of the inner container according to the temperature of the cavity of the inner container.

[0045] Further, the controlling the working condition of the heating element for heating the cavity of the inner container according to the temperature of the cavity of the inner container comprises:

[0046] controlling the heating element to work at a first operating frequency when the temperature of the cavity of the inner container is less than or equal to a second preset temperature;

[0047] When the temperature of the cavity of the inner container is greater than the second preset temperature, the heating element is controlled to work at a second operating frequency.

[0048] Further, the control of the heating element to work at the first operating frequency comprises: controlling the heating element to work continuously; and / or,

[0049] The control of the heating element to work at the second operating frequency comprises: controlling the heating element to work intermittently.

[0050] Further, the control of the heating element to work at the second operating frequency comprises:

[0051] The heating element is controlled to work intermittently at a duty cycle of 12:48.

[0052] By the arrangement of the flow blocking member, the steam in the steam pipe flows from one end of the steam pipe to the other end of the steam pipe, and when the steam flows out of the other end of the steam pipe, it enters the flow blocking channel. Since the flow blocking member is arranged opposite and spaced apart from the steam outlet of the steam pipe, the steam flowing out of the other end of the steam pipe can be blocked and noise-reduced before entering the cavity of the inner container. In addition, by the corresponding control method, the steam generator can have some initial water before starting to work, which can greatly reduce the intensity of steam generation of the steam generator, thereby reducing the noise caused by the intense steam generation of the steam generator and reducing the noise of the steam system during use. BRIEF DESCRIPTION OF DRAWINGS

[0053] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the application, and together with the description, explain the application. In the drawings:

[0054] Figure 1 A structural schematic view of one perspective of a steam system according to an embodiment of the present application is shown;

[0055] Figure 2 A structural schematic view of another perspective of a steam system according to an embodiment of the present application is shown;

[0056] Figure 3 A partial enlarged schematic view of a steam system according to an embodiment of the present application is shown;

[0057] Figure 4 A partial sectional view of a steam system according to an embodiment of the present application is shown;

[0058] Figure 5An exploded view of a steam connector and flow obstruction element provided according to an embodiment of the present invention is shown;

[0059] Figure 6 A flowchart of a control method provided according to an embodiment of the present invention is shown.

[0060] The above figures include the following reference numerals:

[0061] 1. Water tank; 2. First water inlet pipe; 3. Solenoid valve; 4. Water outlet pipe; 5. Top heating element; 6. Main board; 7. Rear fan;

[0062] 8. Steam generator; 9. Temperature sensor; 10. Water inlet pump; 11. Heating element; 12. Second water inlet pipe; 13. Temperature sensing needle;

[0063] 14. Steam inlet pipe;

[0064] 15. Steam connector; 151. Clearance surface; 152. Mating surface; 153. Limiting protrusion;

[0065] 16. Adjusting components; 17. Sealing components; 18. Inner liner; 19. Baffle;

[0066] 20. Flow obstruction component; 201. Annular housing; 2011. First port; 2012. Turbulence protrusion; 202. End plate;

[0067] 21. Steam;

[0068] 22. Cavity;

[0069] 23. Steam outlet;

[0070] 24. Temperature sensor. Detailed Implementation

[0071] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0072] like Figures 1 to 5 As shown, one embodiment of the present invention provides a steam system comprising: a steam generator 8, an inner liner 18, steam pipes, and a flow obstruction element 20. The steam generator 8 generates steam 21. The steam pipes are installed on the inner liner 18, with one end connected to the steam generator 8. The flow obstruction element 20 is disposed at the other end of the steam pipes, with at least a portion of the flow obstruction element 20 positioned opposite and spaced apart from the steam outlet 23 of the steam pipes. The flow obstruction element 20 and at least a portion of the steam pipes form a flow obstruction channel, which communicates with the cavity 22 of the inner liner 18, so that the steam 21 in the steam pipes enters the cavity 22 of the inner liner 18 after passing through the flow obstruction channel.

[0073] With the steam system provided in the embodiment, the steam 21 in the steam pipe flows from one end of the steam pipe to the other end of the steam pipe, and when the steam 21 flows out of the other end of the steam pipe, it enters the flow resistance channel. Since the at least part of the flow resistance member 20 is arranged opposite and spaced apart from the steam outlet 23 of the steam pipe, the steam 21 flowing out of the other end of the steam pipe can be flow-resisted and noise-reduced before entering the cavity 22 of the inner container 18. The above structure can effectively flow-resist the steam 21 and reduce the noise of the steam 21 entering the inner container 18, thereby effectively achieving the noise reduction effect. Therefore, the steam system provided in the embodiment can solve the problem of large noise of the steam system in the prior art.

[0074] Specifically, the steam generator 8 in the embodiment can be an instant heating type steam generator 8, the steam system can be a steam oven or a steam oven, and the cavity 22 of the inner container 18 can be used to place food to be steamed. The steam 21 generated by the steam generator 8 is mainly high-temperature and high-pressure steam 21.

[0075] In the embodiment, the flow resistance member 20 includes a ring-shaped shell 201, the ring-shaped shell 201 is sleeved on the other end of the steam pipe, a part of the ring-shaped shell 201 is connected with the steam pipe, and another part of the ring-shaped shell 201 is spaced apart from and arranged opposite to the steam outlet 23 to form a flow resistance channel. In this way, the arrangement of the ring-shaped shell 201 facilitates effective flow resistance of the steam 21 flowing out of the steam outlet 23, reduces the intensity of the steam 21, and thus facilitates better noise reduction.

[0076] In the embodiment, the flow resistance member 20 further includes an end plate 202, the end plate 202 is connected with the ring-shaped shell 201 and located at the end of the ring-shaped shell 201, and the end plate 202 is arranged opposite to one end of the flow resistance channel to block one end of the flow resistance channel. With such an arrangement, the steam 21 can be further flow-resisted and noise-reduced by the end plate 202, the intense impact or disturbance of the steam 21 flowing out of the cavity 22 of the inner container 18 can be reduced, and the noise reduction effect of the steam 21 can be improved.

[0077] Specifically, the ring-shaped shell 201 in the embodiment has a first port 2011 and a second port arranged opposite to each other, the first port 2011 is sleeved on the other end of the steam pipe, and the second port is located at the end of the other end of the steam pipe.

[0078] The end plate 202 is arranged at the first port 2011, the end plate 202 is a ring-shaped plate structure, the inner circle of the end plate 202 is matched with the shape of the steam pipe to block the gap between the ring-shaped shell 201 and the steam pipe, so that the steam 21 in the flow resistance channel flows out through the second port. In this way, the steam 21 can be better noise-reduced, and the flow resistance effect of the steam 21 can be improved.

[0079] Alternatively, the end plate 202 is arranged at the second port and blocks the second port so that the steam 21 in the flow resistance channel flows out through the first port 2011. In this way, the steam 21 can be effectively reduced in flow resistance and noise.

[0080] Specifically, the first port 2011 is located at one side of the second port close to the inner wall of the inner container 18. Specifically, the arrangement of the end plate 202 at the second port is such that the steam 21 flows towards one side of the inner wall of the inner container 18 after flowing out of the first port 2011, and then disperses into the cavity 22 of the inner container 18. In this way, part of the steam 21 will first contact the inner wall of the inner container 18, which can better reduce the noise of the steam 21 to some extent, improve the flow resistance effect of the steam 21, and reduce the intensity of the steam 21.

[0081] Specifically, the steam pipe assembly includes a steam inlet pipe 14 and a steam joint 15 connected to each other. The steam joint 15 is arranged on the inner container 18, and the steam inlet pipe 14 is detachably connected to the steam joint 15. The steam inlet pipe 14 is arranged outside the inner container 18, and the end of the steam inlet pipe 14 away from the steam joint 15 forms one end of the steam pipe assembly, and the end of the steam joint 15 away from the steam inlet pipe 14 forms the other end of the steam pipe assembly. In this way, the steam inlet pipe 14 and the steam joint 15 can be easily disassembled for maintenance and repair.

[0082] In this embodiment, the other part of the annular housing 201 is provided with a turbulence protrusion 2012, which protrudes from one side of the annular housing 201 close to the steam outlet 23. In this way, the flow resistance effect of the steam 21 can be improved, and the noise can be better reduced.

[0083] In this embodiment, the steam pipe assembly includes a steam joint 15 arranged on the inner container 18. The part of the steam joint 15 located inside the inner container 18 is provided with a first external thread and a steam outlet 23. The steam outlet 23 and the first external thread are arranged along the circumferential direction of the part of the steam joint 15 located inside the inner container 18. The flow resistance member 20 is provided with a first internal thread matched with the first external thread. The flow resistance member 20 is connected to the part of the steam joint 15 located inside the inner container 18 through the thread connection. In this way, the connection between the flow resistance member 20 and the part of the steam joint 15 located inside the inner container 18 can be ensured, and the part of the first internal thread not matched with the flow resistance member 20 can effectively form a turbulence protrusion 2012 to ensure the flow resistance effect and better reduce the noise.

[0084] Specifically, the part of the steam joint 15 located in the inner container 18 comprises an avoiding surface 151 and a matching surface 152 connected to each other along the annular outer edge of the steam joint 15, the avoiding surface 151 is oppositely and spacedly arranged with at least part of the flow resistance member 20, the avoiding surface 151 is provided with the steam outlet 23, and the matching surface 152 is provided with the first external thread.

[0085] Among them, the avoiding surface 151 is at least two, the at least two avoiding surfaces 151 are spacedly arranged along the annular outer edge of the steam joint 15, the matching surface 152 is at least two, one matching surface 152 is arranged between the adjacent two avoiding surfaces 151, each avoiding surface 151 is provided with the steam outlet 23, and each matching surface 152 is provided with the first external thread. In this way, the connection stability can be ensured, and the steam 21 can be effectively discharged and the noise of the steam 21 can be reduced.

[0086] Specifically, the avoiding surface 151 is two, the two avoiding surfaces 151 are spacedly arranged along the annular outer edge of the steam joint 15, the matching surface 152 is two, one matching surface 152 is arranged between the two avoiding surfaces 151, each avoiding surface 151 is provided with the steam outlet 23, and each matching surface 152 is provided with the first external thread, the two avoiding surfaces 151 and the two matching surfaces 152 are connected to form a waist-shaped outer edge. In this way, the connection stability can be ensured, and the steam 21 can be effectively discharged and the noise of the steam 21 can be reduced. In addition, the shape of the steam joint 15 is optimized.

[0087] In the embodiment, the steam system further comprises a sealing member 17 arranged between the steam pipe and the inner container 18 to ensure the sealing effect of the steam pipe arranged at the inner container 18.

[0088] Specifically, the sealing member 17 can be a sealing gasket.

[0089] Specifically, the steam pipe is provided with a limiting protrusion 153, the steam system further comprises an adjusting member 16 adjustably arranged on the steam pipe along the extension direction of the steam pipe and spacedly arranged with the limiting protrusion 153, the adjusting member 16 protrudes from the outer edge of the steam pipe, the sealing member 17 is arranged between the limiting protrusion 153 and the adjusting member 16, and the two ends of the sealing member 17 are used to contact the limiting protrusion 153 and the adjusting member 16 respectively. In this way, the setting stability of the sealing member 17 can be ensured, and the sealing effect of the sealing member 17 can be ensured.

[0090] Specifically, the adjusting member 16 is an adjusting nut, the adjusting nut is provided with a second internal thread, the steam pipe is provided with a second external thread matched with the second internal thread, and the position adjustment of the adjusting member 16 on the steam pipe can be realized through the cooperation of the second internal thread and the second external thread.

[0091] Specifically, the side of the inner container 18 close to the cavity 22 is provided with a baffle 19, the baffle 19 is provided with a limiting hole, the steam pipe is arranged at the limiting hole, a limiting protrusion 153 is located at the side of the limiting hole away from the cavity 22, and the limiting protrusion 153 protrudes from the limiting hole to limit the insertion position of the steam pipe, so that the steam pipe is prevented from being fully inserted into the cavity 22 of the inner container 18, and the steam pipe is facilitated to be limited and operated. Specifically, the steam joint 15 of the steam pipe is arranged at the limiting hole, and the limiting protrusion 153 is arranged at the outer edge of the steam joint 15 and protrudes from the outer edge of the steam joint 15.

[0092] When the high-temperature and high-pressure steam 21 generated by the instant steam generator 8 enters the cavity 22 of the inner container 18 through the steam inlet pipe 14 and the steam joint 15, a pressure relief nut (flow resistance piece 20) is arranged at the steam outlet end of the steam joint 15, and the high-temperature and high-pressure steam 21 needs to pass through the flat gap (steam outlet 23) of the steam joint 15 and the gap between the steam joint 15 and the pressure relief nut. Since the high-temperature and high-pressure steam 21 is repeatedly blocked by the threads of the pressure relief nut, the impact of the high-temperature and high-pressure steam 21 on the surrounding air when entering the cavity 22 of the inner container 18 is reduced, and the generation of noise during steaming is reduced.

[0093] The steam system in the embodiment further includes a water purifying tank 1, a first water inlet pipe 2, a water outlet pipe 4, a top heating pipe 5, a main plate 6, a temperature sensing bag 9, a second water inlet pipe 12, and a temperature sensing needle 13.

[0094] As shown in Figure 6 Another embodiment of the present application provides a control method, which is suitable for the steam system provided above, and is used for controlling the steam system. The control method comprises: adding initial water into the steam generator 8 of the steam system; controlling the steam generator 8 to enter a heating cycle process, controlling the working condition of the steam generator 8 and / or the water adding condition of the steam generator 8 according to the temperature of the steam generator 8 in the heating cycle process, and making the steam 21 generated by the steam generator 8 enter the cavity 22 of the inner container 18 of the steam system.

[0095] By using the control method provided in the embodiment, part of the initial water can be ensured before the steam generator 8 starts to work, so that the intensity of the steam 21 generated by the steam generator 8 is greatly reduced, the condition that the steam generator 8 generates loud noise due to the intense steam 21 is reduced, and the noise of the steam system in the use process is reduced. Therefore, by using the technical solution provided in the embodiment, the technical problem of the steam system in the prior art that the noise is large can be solved.

[0096] In the embodiment, the working condition of the steam generator 8 and / or the water adding condition of the steam generator 8 are controlled according to the temperature of the steam generator 8 in the heating cycle process, including: starting the steam generator 8; obtaining the temperature of the steam generator 8; when the temperature of the steam generator 8 is greater than or equal to the first preset temperature, controlling the steam generator 8 to stop working, and adding the supplemental water into the steam generator 8; when the temperature of the steam generator 8 is less than the first preset temperature, controlling the steam generator 8 to continue working. By using such a method, the steam generator 8 can always have water, thereby effectively reducing the intensity of the steam 21 generated in the steam generator 8, and relatively slowly generating steam 21, thereby reducing the noise.

[0097] Specifically, the initial water added into the steam generator 8 of the steam system includes: the initial water in the steam generator 8 has a first water inlet amount; the supplemental water added into the steam generator 8 includes: the supplemental water in the steam generator 8 has a second water inlet amount; and the second water inlet amount is greater than the first water inlet amount. In this way, the situation that the water in the steam generator 8 is exhausted can be avoided, so as to better adapt to the situation that the temperature of the steam generator 8 rises after starting and more water is consumed, and effectively reduce the intensity of the steam 21 generated in the steam generator 8.

[0098] Specifically, the initial water added into the steam generator 8 of the steam system includes: the initial water in the steam generator 8 has a first water inlet amount; the supplemental water added into the steam generator 8 includes: the supplemental water in the steam generator 8 has a second water inlet amount; and the second water inlet amount is greater than the first water inlet amount. In this way, the situation that the water in the steam generator 8 is exhausted can be avoided, so as to better adapt to the situation that the temperature of the steam generator 8 rises after starting and more water is consumed, and effectively reduce the intensity of the steam 21 generated in the steam generator 8.

[0099] Specifically, the first preset temperature is between 120°C and 200°C, so that the first preset temperature is within the reasonable range, avoiding the situation that the water in the steam generator 8 is exhausted due to the first preset temperature being too high, and avoiding the situation that the steam 21 cannot be effectively generated due to the first preset temperature being too low.

[0100] The first preset time is between 1s and 3s, so as to ensure sufficient water inlet.

[0101] The second preset time is between 2s and 4s, so as to ensure sufficient water inlet.

[0102] In the embodiment, the control method further comprises: acquiring the temperature of the cavity 22 of the inner container 18; and controlling the working condition of the heating element 11 for heating the cavity 22 of the inner container 18 according to the temperature of the cavity 22 of the inner container 18. In this way, the working condition of the heating element 11 can be controlled more reasonably, so as to better adjust and control the temperature of the inner container 18.

[0103] Specifically, the heating element 11 can be a bottom heating tube.

[0104] Specifically, the controlling the working condition of the heating element 11 for heating the cavity 22 of the inner container 18 according to the temperature of the cavity 22 of the inner container 18 comprises: when the temperature of the cavity 22 of the inner container 18 is less than or equal to a second preset temperature, controlling the heating element 11 to work at a first operating frequency; and when the temperature of the cavity 22 of the inner container 18 is greater than the second preset temperature, controlling the heating element 11 to work at a second operating frequency. In this way, the temperature of the cavity 22 of the inner container 18 can be effectively maintained to meet the operating requirements, and excessive energy waste can be avoided, so as to effectively heat the object in the cavity 22 of the inner container 18.

[0105] Specifically, the controlling the heating element 11 to work at the first operating frequency comprises: controlling the heating element 11 to work continuously, so as to quickly raise the temperature of the cavity 22 of the inner container 18.

[0106] Specifically, the controlling the heating element 11 to work at the second operating frequency comprises: controlling the heating element 11 to work intermittently, so as to avoid excessive increase of the temperature of the cavity 22 of the inner container 18 and effectively save energy.

[0107] In the embodiment, the controlling the heating element 11 to work at the second operating frequency comprises: controlling the heating element 11 to work intermittently at a duty cycle of 12:48. At this time, the steam system enters a temperature maintaining stage, and the bottom heating element 11 works at a duty cycle of 12:48 to ensure that the temperature in the cavity 22 of the inner container 18 meets the temperature deviation requirement specified by the set temperature standard, and the balance between the condensate water at the bottom of the inner container 18 and the food cooking effect.

[0108] As Figure 6As shown, the specific control flow of the control method is as follows: when the user sets the cooking mode, time, and temperature, clicks to start, the electromagnetic valve 3 and the back fan 7 are opened, the steam oven enters the heating stage, the water pump 10 pumps water to the instant steam generator 8, the first water pumping time of the water pump 10 is 2 seconds, then the instant steam generator 8 starts to work, and when the temperature sensing needle 13 detects that the temperature of the steam generator 8 reaches 160°C, the working of the steam generator 8 is stopped, and the water pump 10 pumps water again. After the first cycle, the temperature of the instant steam generator 8 is relatively high, which will consume a certain amount of water, and the water pumping time is 3 seconds, which is the cycle. At the same time, the bottom heating pipe starts to work in the whole period, so that the temperature in the cavity 22 of the inner container 18 can be quickly raised, and the condensate at the bottom of the cavity 22 of the inner container 18 is evaporated to reduce the condensate at the bottom of the cavity 22 of the inner container 18 during the steaming process. Specifically, when the temperature sensor 24 detects that the temperature in the cavity 22 of the inner container 18 reaches the set temperature (specifically, the set temperature can be a temperature less than or equal to the maximum temperature, which can be T-5°C, where T is the maximum temperature), the bottom heating pipe stops working in the whole period, and the steam oven enters the temperature maintaining stage. The bottom heating pipe works at a duty cycle of 12:48, and the working procedures of the water pump 10 and the instant steam generator 8 are consistent with those in the heating stage. When the set working time is reached, the electromagnetic valve 3, the back fan 7, the water pump 10, and the instant steam generator 8 stop working, and the cooking is completed.

[0109] Specifically, when the steam oven enters the temperature maintaining stage, the bottom heating pipe works at a duty cycle of 12:48, which can ensure that the temperature in the cavity 22 of the inner container 18 meets the temperature deviation requirement specified by the set temperature standard and balances the condensate at the bottom of the inner container 18 and the cooking effect of the food.

[0110] Specifically, when the steam oven of the present embodiment is steamed, a certain amount of water is first added to the instant steam generator 8, and then the instant steam generator 8 works. Compared with adding water to the instant steam generator 8 first and then working the instant steam generator 8, the intensity of water instantaneous vaporization is much lower, which reduces the noise of the instant steam generator 8 during work from the program aspect.

[0111] Specifically, when the bottom heating pipe works, the temperature in the cavity 22 of the inner container 18 can be quickly raised, and the bottom heating pipe can also evaporate the condensate at the bottom of the cavity 22 of the inner container 18 to reduce the condensate at the bottom of the cavity 22 of the inner container 18 during the steaming process.

[0112] Specifically, when the temperature sensor 24 detects the temperature in the cavity 22 of the inner container 18 reaches a set temperature (specifically, the set temperature can be a temperature less than or equal to the maximum temperature, can be T-5℃, where T is the maximum temperature), the bottom heating tube stops working for the whole period, the steam oven enters the temperature maintaining stage, the bottom heating tube 12:48 duty cycle works, the water inlet pump 10 and the instant steam generator 8 work in accordance with the working procedure and the temperature rising stage; when the user sets the working time, the electromagnetic valve 3, the back fan 7, the water inlet pump 10, the instant steam generator 8 stop working, and the cooking is completed.

[0113] During the steaming of the steam oven, a certain amount of water is first added to the instant steam generator 8, and then the instant steam generator 8 works. Compared with first adding water to the instant steam generator 8, the instant steam generator 8 works, and the violent degree of water instantaneous vaporization is much less, which reduces the noise of the instant steam generator 8 during working from the program aspect.

[0114] Another embodiment of the present application provides a steam system, comprising: a water adding module configured to add initial water to a steam generator 8 of the steam system; a heating module configured to control the steam generator 8 to enter a heating cycle process, control the working condition of the steam generator 8 and / or the water adding condition of the steam generator 8 according to the temperature of the steam generator 8 in the heating cycle process, and make the steam 21 generated by the steam generator 8 enter the cavity 22 of the inner container 18 of the steam system.

[0115] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects: mainly solving the problem of excessive noise in the instant steam generator steaming process from the aspects of program and physical structure. Program aspect: first, the time (water height) of the water inlet pump is controlled by logic, and then the water is heated by the instant steam generator to produce steam, which is relatively slow. Compared with the previous instant steam generator heating to a certain temperature and then adding water to the instant steam generator, the violent degree of steam generation is much smaller. Physical structure aspect: before the steam enters the inner container cavity, a pressure reducing nut is arranged, so that the high temperature and high pressure steam flows between the thread gap between the flat gap (corresponding to the steam outlet) of the steam outlet joint and the pressure reducing nut (corresponding to the flow resistance piece), so as to reduce the impact or disturbance of the steam entering the inner container cavity on the surrounding air, and reduce the generation of noise during steaming.

[0116] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0117] The relative arrangement of components and steps, numerical expressions, and numerical values set forth in the examples are not meant to limit the scope of the present application unless otherwise specifically stated. It is also to be understood that the specific dimensions shown in the drawings are not to scale and that the dimensions of the various parts are not intended to limit the scope of the application. Techniques, methods, and apparatus known to those of ordinary skill are not discussed in detail but can be employed by persons of ordinary skill in the art. In all examples shown and discussed herein, any specific values are to be interpreted as merely illustrative and not limiting. Other examples of the example embodiments can therefore have different values. It is noted that like numbers and letters on the figures identify like parts throughout the several views, and thus, once an item is defined in one figure, it is not necessary to discuss it further in connection with other figures where it is not explicitly defined.

[0118] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by terms such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "horizontal", and "top", "bottom" are generally based on the orientation or positional relationships shown in the drawings, and are merely intended to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of protection of the present application. The orientation terms "inner", "outer" refer to the inner and outer relative to the contour of the components themselves.

[0119] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical" and "horizontal" as can be perceived herein relative to the accompanying drawings refer to the orientation of the components being described. However, it is to be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device described herein relative to the other device or structure is inverted, then a spatially relative term such as "above" can be interpreted as meaning "below" or "below" can be interpreted as meaning "above". The device can also be oriented in other ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0120] In addition, it should be pointed out that the use of "first", "second" and the like words to define parts, only for the convenience of the corresponding parts to be distinguished, as no further declaration, the above words have no special meaning, therefore can not be understood as limiting the scope of the present application.

[0121] The above only the preferred embodiments of the present application, and is not intended to limit the present application, for those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the scope of protection of the present application.

Claims

1. A steam system characterized by, The steam generator (8) and the inner container (18) are provided, and the steam generator (8) is used for generating steam. A steam pipe is arranged on the inner container (18), and one end of the steam pipe is connected with the steam generator (8). A flow resistance member (20) is arranged at the other end of the steam pipe, at least a part of the flow resistance member (20) is arranged opposite and spaced apart from the steam outlet (23) of the steam pipe, a flow resistance channel is formed between the flow resistance member (20) and at least a part of the steam pipe, the flow resistance channel is communicated with the cavity of the inner container (18), so that the steam in the steam pipe enters the cavity of the inner container (18) through the flow resistance channel. The steam pipe comprises a steam joint (15), the steam joint (15) is arranged on the inner container (18), a first external thread and a steam outlet (23) are arranged on the part of the steam joint (15) in the inner container (18), the steam outlet (23) and the first external thread are arranged along the circumferential direction of the part of the steam joint (15) in the inner container (18), a first internal thread matched with the first external thread is arranged on the flow resistance member (20), and the flow resistance member (20) is connected with the part of the steam joint (15) in the inner container (18) through the thread. The flow resistance member (20) comprises a ring-shaped shell (201), the ring-shaped shell (201) is sleeved on the other end of the steam pipe, a part of the ring-shaped shell (201) is connected with the steam pipe, and the other part of the ring-shaped shell (201) is arranged opposite and spaced apart from the steam outlet (23) to form the flow resistance channel.

2. The steam system of claim 1, wherein, The flow resistance member (20) further comprises an end plate (202), the end plate (202) is connected with the ring-shaped shell (201) and located at the end of the ring-shaped shell (201), and the end plate (202) is arranged opposite to one end of the flow resistance channel to block one end of the flow resistance channel.

3. The steam system of claim 2, wherein, The ring-shaped shell (201) has a first port (2011) and a second port arranged opposite, the first port (2011) is sleeved on the other end of the steam pipe, and the second port is located at the end of the other end of the steam pipe.

4. The steam system of claim 3, wherein, The end plate (202) is arranged at the first port (2011), the end plate (202) is a ring-shaped plate structure, the inner ring of the end plate (202) is matched with the shape of the steam pipe to block the gap between the ring-shaped shell (201) and the steam pipe, so that the steam in the flow resistance channel flows out through the second port; or The end plate (202) is arranged at the second port and blocks the second port, so that the steam in the flow resistance channel flows out through the first port (2011). The first port (2011) is located on the side of the second port close to the wall of the inner container (18); and / or 5. The steam system of claim 4, wherein, The first port (2011) is located on the side of the second port close to the wall of the inner container (18); and / or The steam pipe fitting comprises a steam inlet pipe (14) and a steam joint (15) connected with each other, the steam joint (15) is arranged on the inner container (18), the steam inlet pipe (14) is detachably connected with the steam joint (15), the steam inlet pipe (14) is arranged outside the inner container (18), one end of the steam inlet pipe (14) away from the steam joint (15) forms one end of the steam pipe fitting, and the other end of the steam joint (15) away from the steam inlet pipe (14) forms the other end of the steam pipe fitting.

6. The steam system of claim 2, wherein, The other part of the annular shell (201) is provided with a spoiler (2012) which protrudes from the side of the annular shell (201) close to the steam outlet (23).

7. The steam system of claim 1, wherein, The part of the steam joint (15) located in the inner container (18) comprises an avoiding surface (151) and a matching surface (152) connected with each other along the annular outer edge of the steam joint (15), the avoiding surface (151) is arranged opposite and spaced apart from at least part of the flow resistance piece (20), the steam outlet (23) is arranged on the avoiding surface (151), and the first external thread is arranged on the matching surface (152).

8. The steam system according to claim 7, characterized in that, The avoiding surface (151) is at least two, the at least two avoiding surfaces (151) are arranged spaced apart along the annular outer edge of the steam joint (15), the matching surface (152) is at least two, one matching surface (152) is arranged between the adjacent two avoiding surfaces (151), the steam outlet (23) is arranged on each avoiding surface (151), and the first external thread is arranged on each matching surface (152); or, The avoiding surface (151) is two, the two avoiding surfaces (151) are arranged spaced apart along the annular outer edge of the steam joint (15), the matching surface (152) is two, one matching surface (152) is arranged between the two avoiding surfaces (151), the steam outlet (23) is arranged on each avoiding surface (151), the first external thread is arranged on each matching surface (152), and the two avoiding surfaces (151) and the two matching surfaces (152) are connected to form a waist-shaped outer edge.

9. The steam system of claim 1, wherein, The steam pipe fitting is provided with a limiting protrusion (153), and the steam system further comprises: A sealing member (17) arranged between the steam pipe fitting and the inner container (18); An adjusting member (16) arranged on the steam pipe fitting in a position adjustable along the extension direction of the steam pipe fitting and spaced apart from the limiting protrusion (153), the adjusting member (16) protrudes from the outer edge of the steam pipe fitting, the sealing member (17) is arranged between the limiting protrusion (153) and the adjusting member (16), and the two ends of the sealing member (17) are respectively used for contacting the limiting protrusion (153) and the adjusting member (16).

10. A control method characterized by, The control method is suitable for the steam system of any one of claims 1 to 9, and the control method comprises: adding initial water into a steam generator of the steam system; controlling the steam generator to enter a heating cycle process, controlling operation of the steam generator and / or water feeding of the steam generator according to temperature of the steam generator in the heating cycle process, and causing steam generated by the steam generator to enter a cavity of an inner container of the steam system.

11. The control method according to claim 10, characterized by, The controlling operation of the steam generator and / or water feeding of the steam generator according to temperature of the steam generator in the heating cycle process comprises: starting the steam generator; acquiring temperature of the steam generator; when the temperature of the steam generator is greater than or equal to a first preset temperature, controlling the steam generator to stop working and adding supplemental water into the steam generator; when the temperature of the steam generator is less than the first preset temperature, controlling the steam generator to continue working.

12. The control method of claim 11, wherein: the adding initial water into the steam generator comprises: causing the initial water in the steam generator to have a first water inflow amount; the adding supplemental water into the steam generator comprises: causing the supplemental water in the steam generator to have a second water inflow amount; wherein the second water inflow amount is greater than the first water inflow amount.

13. The control method of claim 11, wherein: the adding initial water into the steam generator comprises: controlling water inflow into the steam generator for a first preset time length; the adding supplemental water into the steam generator comprises: controlling water inflow into the steam generator for a second preset time length; wherein the first preset time length is less than the second preset time length.

14. The control method of claim 13, wherein: the first preset temperature is between 120°C and 200°C; and / or, the first preset time length is between 1s and 3s; and / or, the second preset time length is between 2s and 4s.

15. The control method according to claim 10, characterized by, The control method further comprises: acquiring temperature of the cavity of the inner container; controlling operation of a heating element for heating the cavity of the inner container according to the temperature of the cavity of the inner container.

16. The control method according to claim 15, characterized by The controlling operation of the heating element according to the temperature of the cavity of the inner container comprises: when the temperature of the cavity of the inner container is less than or equal to a second preset temperature, controlling the heating element to work at a first operating frequency; when the temperature of the cavity of the inner container is greater than the second preset temperature, controlling the heating element to work at a second operating frequency.

17. The control method of claim 16, wherein: the controlling the heating element to work at the first operating frequency comprises: controlling the heating element to work continuously; and / or, the controlling the heating element to work at the second operating frequency comprises: controlling the heating element to work intermittently.

18. The control method according to claim 17, characterized by, The control of the heat-generating component to work at the second operating frequency comprises: controlling the heat-generating component to intermittently work at a duty cycle of 12:48.

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