Oxygen concentration adjusting device, control method and cooking utensil

Abstract

The invention discloses an oxygen concentration adjusting device, a control method and cooking equipment, the oxygen concentration adjusting device comprises an air pump, a molecular sieve assembly, an oxygen outlet, a nitrogen outlet and a nitrogen switch, the air pump is communicated with the molecular sieve assembly, one end of the oxygen outlet is communicated with an air outlet of the molecular sieve assembly, and the other end of the oxygen outlet is communicated with an air outlet of the molecular sieve assembly. One end of the nitrogen outlet is communicated with the air outlet of the molecular sieve assembly, the other end of the nitrogen outlet is communicated with the outside, and the nitrogen switch is used for controlling opening and closing of the nitrogen outlet. According to the oxygen concentration adjusting device, by arranging the molecular sieve assembly, the oxygen concentration of the gas exhausted from the oxygen outlet can be adjusted, and by arranging the nitrogen switch, opening and closing of the nitrogen outlet are controlled through the nitrogen switch, so that control over nitrogen emission is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking appliances, and in particular to an oxygen concentration regulating device, a control method and a cooking appliance. Background Art

[0002] The Maillard reaction, also known as the non-enzymatic browning reaction, mainly refers to the reaction between carbonyl compounds (reducing sugars) and amino compounds (amino acids and proteins). The Maillard reaction is involved in the cooking process of food. The Maillard reaction has a great influence on the flavor and color of food, making the flavor and color of the product better. During the cooking process, the progress of the Maillard reaction can be affected by adjusting the concentration of oxygen and nitrogen in the air introduced into the cooking utensils.

[0003] In the related art, an oxygen production module is usually provided in the cooking appliance to adjust the concentration of oxygen and nitrogen in the cooking cavity. The nitrogen outlet of the existing oxygen production module is always connected to the outside, which makes it impossible to control the nitrogen emission. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an oxygen concentration regulating device, which can achieve regulation of the oxygen concentration discharged from the oxygen outlet and control of nitrogen emission.

[0005] The oxygen concentration regulating device according to an embodiment of the present invention comprises: an air pump; a molecular sieve assembly, wherein the air pump is connected to the molecular sieve assembly; an oxygen outlet, wherein one end of the oxygen outlet is connected to the gas outlet of the molecular sieve assembly, and the other end is connected to the outside; a nitrogen outlet, wherein one end of the nitrogen outlet is connected to the gas outlet of the molecular sieve assembly, and the other end is connected to the outside; and a nitrogen switch, wherein the nitrogen switch is used to control the opening and closing of the nitrogen outlet.

[0006] According to the oxygen concentration regulating device of the embodiment of the present invention, by setting a molecular sieve component, it is possible to adjust the oxygen concentration of the gas discharged from the oxygen outlet, and by setting a nitrogen switch to control the opening and closing of the nitrogen outlet through the nitrogen switch, thereby achieving control of nitrogen emissions.

[0007] According to the oxygen concentration regulating device of some embodiments of the present invention, the cross-sectional area of ​​the oxygen outlet is smaller than the cross-sectional area of ​​the nitrogen outlet.

[0008] The oxygen concentration regulating device according to some embodiments of the present invention further includes an oxygen switch, and the oxygen switch is used to control the opening and closing of the oxygen outlet.

[0009] According to the oxygen concentration regulating device of some embodiments of the present invention, the cross-sectional area of ​​the oxygen outlet is not less than the cross-sectional area of ​​the nitrogen outlet, and the oxygen concentration regulating device further includes an oxygen switch, which is used to control the opening and closing of the oxygen outlet.

[0010] According to some embodiments of the oxygen concentration regulating device of the present invention, the oxygen concentration regulating device also includes an interface integrated structure, the interface integrated structure is provided with a built-in flow channel, the built-in flow channel has a connecting inlet, the connecting inlet is connected to the gas outlet of the molecular sieve component, the oxygen outlet and the nitrogen outlet are both connected to the built-in flow channel, and the oxygen outlet and the nitrogen outlet are respectively connected to the outside of the interface integrated structure.

[0011] According to the oxygen concentration regulating device of some embodiments of the present invention, the built-in flow channel includes an inlet flow channel, a first outlet flow channel and a second outlet flow channel, the connecting inlet is connected to the inlet flow channel, the first outlet flow channel is connected between the inlet flow channel and the oxygen outlet, and the second outlet flow channel is connected between the inlet flow channel and the nitrogen outlet.

[0012] According to the oxygen concentration regulating device of some embodiments of the present invention, the nitrogen switch and / or the oxygen switch is a solenoid valve.

[0013] According to the oxygen concentration regulating device of some embodiments of the present invention, the inner diameter of the air inlet of the first outlet flow channel is smaller than the inner diameter of the air outlet of the first outlet flow channel.

[0014] According to the oxygen concentration regulating device of some embodiments of the present invention, the molecular sieve assembly includes: a molecular sieve and a shell, and the molecular sieve is filled in the shell.

[0015] The invention also provides a cooking utensil.

[0016] The cooking appliance according to an embodiment of the present invention comprises: a shell, wherein a cooking space is provided in the shell; an oxygen concentration regulating device, wherein the oxygen concentration regulating device is the oxygen concentration regulating device described in any one of the above embodiments, and the oxygen concentration regulating device is installed in the shell; the oxygen outlet is open toward the inside of the cooking space, and the nitrogen outlet is open toward the outside of the cooking space.

[0017] The invention also provides a control method for the oxygen concentration regulating device.

[0018] According to the control method of the oxygen concentration regulating device of the embodiment of the present invention, the control method is applied to the regulating devices and cooking appliances of some of the above-mentioned embodiments, and the control method includes: controlling the air pump to turn on, and controlling the nitrogen switch to close the nitrogen outlet; within a first set time, or when the pressure in the molecular sieve component reaches a first set value, or when the oxygen concentration at the outlet of the molecular sieve component reaches a first concentration value, controlling high-concentration oxygen to be discharged from the oxygen outlet; after the first set time, or when the pressure in the molecular sieve component reaches a second set value, or when the oxygen concentration at the outlet of the molecular sieve component reaches a second concentration value, controlling the nitrogen switch to open the nitrogen outlet, and controlling high-concentration nitrogen to be discharged from the nitrogen outlet.

[0019] According to the control method of the oxygen concentration regulating device of some embodiments of the present invention, after controlling the nitrogen switch to open the nitrogen outlet, before controlling the high concentration nitrogen to be discharged from the nitrogen outlet, turning off the oxygen switch to close the oxygen outlet.

[0020] The present invention also provides another control method for the oxygen concentration regulating device.

[0021] According to the control method of the oxygen concentration regulating device of the embodiment of the present invention, the control method is applied to the regulating devices and cooking appliances of other embodiments mentioned above, and the control method comprises: controlling the air pump to turn on, and controlling the nitrogen switch to close the nitrogen outlet; within a first set time, or when the pressure in the molecular sieve component reaches a first set value, or when the oxygen concentration at the gas outlet of the molecular sieve component reaches a first concentration value, controlling high-concentration oxygen to be discharged from the oxygen outlet; after the first set time, or when the pressure in the molecular sieve component reaches a second set value, or when the oxygen concentration at the gas outlet of the molecular sieve component reaches a second concentration value, controlling the nitrogen switch to open the nitrogen outlet, closing the oxygen switch to close the oxygen outlet, and controlling high-concentration nitrogen to be discharged from the nitrogen outlet.

[0022] The control method of the oxygen concentration regulating device, the cooking appliance and the above-mentioned oxygen concentration regulating device have the same advantages over the prior art, which will not be described in detail here.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 is a schematic diagram of an oxygen concentration regulating device according to some embodiments of the present invention;

[0026] Figure 2 yes Figure 1 A schematic diagram of another perspective of the oxygen concentration adjustment device shown in ;

[0027] Figure 3 yes Figure 1 A cross-sectional view of the oxygen concentration regulating device shown in ;

[0028] Figure 4 yes Figure 1 An exploded view of the oxygen concentration regulating device shown in FIG.

[0029] Figure 5 yes Figure 1 An exploded view of the oxygen concentration regulating device shown in (another perspective);

[0030] Figure 6 is a schematic diagram of an oxygen concentration regulating device according to other embodiments of the present invention;

[0031] Figure 7 is one of the flow charts of a control method of an oxygen concentration regulating device according to some embodiments of the present invention;

[0032] Figure 8 is a second flow chart of a control method of an oxygen concentration regulating device according to some embodiments of the present invention;

[0033] Fig. 9 is one of the flow charts of the control method of the oxygen concentration regulating device according to other embodiments of the present invention;

[0034] Fig.10 is a schematic diagram of a cooking appliance according to some embodiments of the present invention;

[0035] Fig.11 yes Fig.10 Schematic diagram of the working process of the device for adjusting the oxygen concentration of the cooking appliance shown in FIG.

[0036] Reference numerals:

[0037] Cooking utensils 1000,

[0038] Oxygen concentration adjusting device 100, housing 200, filter 300,

[0039] Air pump 10, air pump outlet 11,

[0040] Molecular sieve assembly 20, molecular sieve tank 201, molecular sieve tube 202,

[0041] The air inlet 21 of the molecular sieve assembly and the air outlet 22 of the molecular sieve assembly,

[0042] The interface integrated structure 30 is connected with an inlet 301, an oxygen outlet 302, a nitrogen outlet 303, and an air pump interface 304.

[0043] Molecular sieve component inlet 305, solenoid valve inlet 306, solenoid valve outlet 307, solenoid valve interface 308,

[0044] Inlet flow channel 311, first outlet flow channel 312, flow restriction hole 3121,

[0045] The second outlet flow channel 313,

[0046] Nitrogen switch 40. DETAILED DESCRIPTION

[0047] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0048] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific processes and examples of materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0049] Reference below Figure 1-Figure 11 The oxygen concentration adjustment device 100 according to an embodiment of the present invention is described.

[0050] The oxygen concentration regulating device 100 according to the embodiment of the present invention comprises: an air pump 10 , a molecular sieve assembly 20 , an oxygen outlet 302 , a nitrogen outlet 303 and a nitrogen switch 40 .

[0051] Specifically, Figure 1-Figure 3 As shown, the air pump 10 is connected to the molecular sieve assembly 20, one end of the oxygen outlet 302 is connected to the gas outlet of the molecular sieve assembly 20, and the other end is connected to the outside, one end of the nitrogen outlet 303 is connected to the gas outlet of the molecular sieve assembly 20, and the other end is connected to the outside, and the nitrogen switch 40 is used to control the opening and closing of the nitrogen outlet 303.

[0052] Thus, the adsorption characteristics of the molecular sieve assembly can be used to separate oxygen from the air to adjust the oxygen concentration of the gas discharged from the oxygen outlet 302, and the opening and closing of the nitrogen outlet 303 can be controlled by the nitrogen switch 40 to control the nitrogen emission.

[0053] For example Figure 1-Figure 3 As shown, the regulating device includes an air pump, an oxygen outlet 302 , a nitrogen outlet 303 and a nitrogen switch 40 .

[0054] It should be noted that the oxygen outlet 302 and the nitrogen outlet 303 can be installed on the molecular sieve assembly as separate outlet structures, or the oxygen outlet 302 and the nitrogen outlet 303 can also be directly integrated on the molecular sieve assembly, and when the oxygen outlet 302 and the nitrogen outlet 303 are directly integrated on the molecular sieve assembly, the oxygen outlet 302 and the nitrogen outlet 303 are both located downstream of the airflow direction of the molecular sieve assembly.

[0055] During actual assembly, the air pump outlet 11 is first connected to the air inlet 21 of the molecular sieve assembly, and then the air outlet 22 of the molecular sieve assembly is connected to the oxygen outlet 302 and the nitrogen outlet 303 respectively, so that the air pump 10 can pump external air (with a lower oxygen content) into the molecular sieve assembly 20.

[0056] Then, the molecular sieve assembly 20 has a certain adsorption effect on the nitrogen in the air flowing through it, so that the nitrogen content in the gas discharged from the oxygen outlet 302 of the molecular sieve assembly is reduced, which is equivalent to increasing the oxygen concentration in the gas discharged from the oxygen outlet 302.

[0057] The nitrogen switch 40 may be disposed at the nitrogen outlet 303 , so that the nitrogen switch 40 can be used to control the opening and closing of the nitrogen outlet 303 .

[0058] Thus, in actual use, for example, when it is necessary to discharge gas with a high oxygen concentration, the nitrogen switch 40 can be used to close the nitrogen outlet 303 to prevent gas leakage from the nitrogen outlet 303 . At this time, the gas with a high oxygen concentration can be discharged from the oxygen outlet 302 .

[0059] Alternatively, when it is necessary to discharge the gas with a higher nitrogen concentration, the nitrogen switch 40 can be used to open the nitrogen outlet 303 to ensure that the gas with a higher nitrogen concentration can be discharged from the nitrogen outlet 303. At this time, the gas with a higher nitrogen concentration can be discharged from the nitrogen outlet 303.

[0060] The nitrogen switch 40 may be a manual switch, or a solenoid valve, or a hydraulic valve, or other switch structures that meet the use requirements, which are not limited here.

[0061] It should be noted that the oxygen concentration in the gas with a higher oxygen concentration in the present invention is relative to the outside air, not pure oxygen, and the nitrogen concentration in the gas with a higher nitrogen concentration is also relative to the outside air, not pure nitrogen.

[0062] According to the oxygen concentration regulating device of the embodiment of the present invention, by setting a molecular sieve component, it is possible to adjust the oxygen concentration of the gas discharged from the oxygen outlet 302, and by setting a nitrogen switch 40 to control the opening and closing of the nitrogen outlet 303 through the nitrogen switch 40, thereby achieving control of nitrogen emissions.

[0063] In some embodiments, Figure 3 As shown, the cross-sectional area of ​​the oxygen outlet 302 is smaller than the cross-sectional area of ​​the nitrogen outlet 303 .

[0064] It should be noted that the cross-sectional area of ​​the oxygen outlet 302 is small, so that the oxygen outlet 302 is formed as a flow limiting hole 3121, thereby, a certain pressure can be formed in the molecular sieve assembly 20, so that the molecular sieve assembly 20 can adsorb the nitrogen in the air pumped into the air pump 10 to a certain extent, and facilitate the gas with a higher oxygen concentration to be discharged through the oxygen outlet 302 under the action of the pressure difference. Moreover, since the cross-sectional area of ​​the oxygen outlet 302 is smaller than the cross-sectional area of ​​the nitrogen outlet 303, when the nitrogen outlet 303 discharges the gas with a higher nitrogen concentration, the gas leakage at the oxygen outlet 302 can be reduced.

[0065] In some embodiments, the oxygen concentration regulating device 100 further includes an oxygen switch (not shown in the figure), which is used to control the opening and closing of the oxygen outlet 302.

[0066] Therefore, the oxygen outlet 302 can be controlled by the oxygen switch so that the oxygen outlet 302 can be selectively connected to the outside, especially when the nitrogen outlet 303 is used to discharge the gas with a high nitrogen concentration, the gas can be prevented from being discharged incorrectly from the oxygen outlet 302.

[0067] The oxygen switch may be a manual switch, or a solenoid valve, or a hydraulic valve, or other switch structures that meet the use requirements, which are not limited here.

[0068] In other embodiments, the cross-sectional area of ​​the oxygen outlet 302 is not less than the cross-sectional area of ​​the nitrogen outlet 303 , and the oxygen concentration regulating device 100 further includes an oxygen switch (not shown in the figure), which is used to control the opening and closing of the oxygen outlet 302 .

[0069] Therefore, since the nitrogen outlet 303 and the oxygen outlet 302 are respectively provided with the nitrogen switch 40 and the oxygen switch, the relationship between the cross-sectional area of ​​the oxygen outlet 302 and the cross-sectional area of ​​the nitrogen outlet 303 will not affect the exhaust, wherein, "the cross-sectional area of ​​the oxygen outlet 302 is not less than the cross-sectional area of ​​the nitrogen outlet 303" includes but is not limited to the cross-sectional area of ​​the oxygen outlet 302 being equal to the cross-sectional area of ​​the nitrogen outlet 303, or the cross-sectional area of ​​the oxygen outlet 302 being greater than the cross-sectional area of ​​the nitrogen outlet 303, and is not limited here.

[0070] In this way, the oxygen switch can control the opening and closing of the oxygen outlet 302, and the nitrogen switch 40 can control the opening and closing of the nitrogen outlet 303. In this way, when the oxygen outlet 302 discharges gas with a high oxygen concentration, the nitrogen outlet 303 can be closed by the nitrogen switch 40 to avoid gas leakage at the nitrogen outlet 303, or when the nitrogen outlet 303 discharges gas with a high nitrogen concentration, the oxygen switch can be used to close the oxygen outlet 302 to avoid gas leakage at the oxygen outlet 302.

[0071] In some embodiments, Figure 1-Figure 6 As shown, the oxygen concentration regulating device 100 further includes: an interface integrated structure 30 .

[0072] like Figure 3 As shown, the interface integrated structure 30 is provided with a built-in flow channel, the built-in flow channel has a connecting inlet 301, the connecting inlet 301 is connected to the gas outlet 22 of the molecular sieve component, the oxygen outlet 302 and the nitrogen outlet 303 are both connected to the built-in flow channel, and the oxygen outlet 302 and the nitrogen outlet 303 are respectively connected to the outside of the interface integrated structure 30.

[0073] Optionally, the interface integrated structure 30 may be constructed as an air path plate or other structure that can be provided with a built-in flow channel, which is not limited here.

[0074] It should be noted that the various components of the existing oxygen production module are usually connected by separate gas connection pipes, but multiple gas connection pipes need to occupy a large internal space, resulting in the oxygen production module being very large and the control being very complex, which is not suitable for application in small household appliances.

[0075] Therefore, in the present invention, the oxygen outlet 302 and the nitrogen outlet 303 of the regulating device 100 are integrated on the interface integrated structure 30, so as to reduce the volume of the oxygen concentration regulating device 100, facilitate its miniaturized design, and make it suitable for small household appliances.

[0076] For example Figure 1-Figure 6 As shown, the oxygen concentration regulating device 100 includes an air pump 10 , a molecular sieve assembly 20 and an interface integrated structure 30 .

[0077] During actual assembly, the air pump outlet 11 is first connected to the air inlet 21 of the molecular sieve assembly, and then the air outlet 22 of the molecular sieve assembly is connected to the connection inlet 301 on the interface integrated structure 30, so that the air pump 10 can pump external air (with a lower oxygen content) into the molecular sieve assembly 20.

[0078] The molecular sieve assembly 20 has a certain adsorption effect on the nitrogen in the air flowing through it, so that the nitrogen content in the gas discharged from the outlet 22 of the molecular sieve assembly is reduced, which is equivalent to increasing the oxygen concentration in the gas discharged from the outlet.

[0079] Then, the gas discharged from the gas outlet 22 of the molecular sieve component enters the built-in flow channel through the connecting inlet 301, and when the pressure inside the molecular sieve component 20 is relatively high, the molecular sieve component 20 will adsorb the nitrogen in the air to form a gas with a higher oxygen concentration, and under the action of pressure, the gas with a higher oxygen concentration can flow through the built-in flow channel and be discharged from the oxygen outlet 302, or when the pressure inside the molecular sieve component 20 is relatively low, the nitrogen adsorbed by the molecular sieve component 20 will automatically separate from the molecular sieve component 20, so that the gas with a higher nitrogen concentration is discharged from the nitrogen outlet 303.

[0080] It should be noted that the oxygen concentration in the gas with a higher oxygen concentration in the present invention is relative to the outside air, not pure oxygen, and the nitrogen concentration in the gas with a higher nitrogen concentration is also relative to the outside air, not pure nitrogen.

[0081] In this way, by setting a built-in flow channel on the interface integrated structure 30, the oxygen outlet 302 and the nitrogen outlet 303 of the regulating device 100 are integrated on the interface integrated structure 30, so as to reduce the volume of the oxygen concentration regulating device 100, which is conducive to realizing its miniaturized design and making it suitable for small household appliances.

[0082] Alternatively, if Figure 4 and Figure 5 As shown, an air pump interface 304 and a molecular sieve assembly inlet 305 are provided on the interface integrated structure 30, the air pump outlet 11 is connected to the air pump interface 304, the air pump interface 304 is connected to the molecular sieve assembly inlet 305, and the air inlet 21 of the molecular sieve assembly is suitable for being connected to the molecular sieve assembly inlet 305, so that the connection between the air pump 10 and the molecular sieve assembly 20 can be achieved through the air pump interface 304 and the molecular sieve assembly inlet 305 on the interface integrated structure 30.

[0083] As a result, the air pump 10 and the molecular sieve assembly 20 can be connected to each other by using the interface integrated structure 30, that is, there is no need to set up a separate connecting pipeline between the two, thereby facilitating further reducing the volume of the oxygen concentration regulating device 100, facilitating its miniaturized design, and making it suitable for small household appliances.

[0084] Optionally, at least one of the air pump 10 and the molecular sieve assembly 20 can be fixed to the interface integrated structure 30, such as the air pump 10 is fixed to the interface integrated structure 30 by bolting to enhance the structural stability of the air pump 10, and / or the molecular sieve assembly 20 is fixed to the interface integrated structure 30 by bolting to enhance the structural stability of the molecular sieve assembly 20.

[0085] In this way, the air pump 10 and the molecular sieve assembly 20 can be integrated on the interface integrated structure 30, thereby reducing the volume of the oxygen concentration regulating device 100 and facilitating its miniaturized design.

[0086] Of course, the connection method between the air pump 10 and / or the molecular sieve assembly 20 and the interface integrated structure 30 can also be a snap-on connection, a plug-in connection, or a magnetic fit, etc., which is not limited here.

[0087] According to the oxygen concentration regulating device 100 of the embodiment of the present invention, a built-in flow channel is provided on the interface integrated structure 30, and the connection inlet 301 of the built-in flow channel is communicated with the gas outlet 22 of the molecular sieve assembly, so as to realize the discharge of high-concentration oxygen and high-concentration nitrogen through the built-in flow channel of the interface integrated structure 30. At the same time, the oxygen outlet 302 and the nitrogen outlet 303 are integrated on the interface integrated structure 30, so as to reduce the volume of the oxygen concentration regulating device 100, which is conducive to realizing its miniaturized design, so that it can be suitable for small household appliances.

[0088] In some embodiments, Figure 3 As shown, the built-in flow channel includes an inlet flow channel 311 , a first outlet flow channel 312 and a second outlet flow channel 313 .

[0089] The connecting inlet 301 is communicated with the inlet flow channel 311 , the first outlet flow channel 312 is communicated between the inlet flow channel 311 and the oxygen outlet 302 , and the second outlet flow channel 313 is communicated between the inlet flow channel 311 and the nitrogen outlet 303 .

[0090] Thus, by providing the first outlet flow channel 312 and the second outlet flow channel 313 , the gas with a higher oxygen concentration and the gas with a higher nitrogen concentration can be discharged from the oxygen outlet 302 and the nitrogen outlet 303 respectively.

[0091] In some embodiments, the nitrogen switch 40 and / or the oxygen switch is a solenoid valve.

[0092] For example, the nitrogen switch 40 is a solenoid valve, or the oxygen switch is a solenoid valve, or both the nitrogen switch 40 and the oxygen switch are solenoid valves. This makes it easy to reduce the difficulty of setting the nitrogen switch 40 and / or the oxygen switch, and helps to reduce the difficulty of controlling the nitrogen switch 40 and / or the oxygen switch.

[0093] For example, the nitrogen switch 40 is configured as a solenoid valve, which is disposed in the second outlet flow passage 313 and is used to control the second outlet flow passage 313 to be opened or closed.

[0094] Therefore, by providing the solenoid valve, it is possible to control whether the gas with a high nitrogen concentration can be discharged from the nitrogen outlet 303 .

[0095] For example, the nitrogen switch 40 is constructed as a solenoid valve, and a solenoid valve interface 308 is also provided on the interface integrated structure 30, and the solenoid valve interface 308 is connected to the second outlet flow channel 313, wherein two solenoid valve interfaces 308 are provided, and the two solenoid valve interfaces 308 are respectively used to communicate with the solenoid valve inlet 306 and the solenoid valve outlet 307, so that when the gas with a higher nitrogen concentration flows along the second outlet flow channel 313 toward the nitrogen outlet 303, the gas with a higher nitrogen concentration will flow through the solenoid valve. At this time, the solenoid valve can control the on-off of the second outlet flow channel 313, thereby controlling whether the gas with a higher nitrogen concentration can be discharged from the nitrogen outlet 303.

[0096] At the same time, such a configuration allows the solenoid valve to be directly installed on the interface integrated structure 30, that is, there is no need to set up a separate connecting pipeline between the two, thereby facilitating further reducing the volume of the oxygen concentration regulating device 100, facilitating its miniaturized design, and making it suitable for small household appliances.

[0097] Optionally, the solenoid valve can be fixed to the interface integrated structure 30, such as the solenoid valve is fixed to the interface integrated structure 30 by bolt connection, so as to enhance the structural stability of the solenoid valve. Of course, the solenoid valve and the interface integrated structure 30 can also be connected by snap connection, plug connection, or magnetic attraction, etc., which is not limited here.

[0098] In some embodiments, the first outlet flow channel 312 and the second outlet flow channel 313 are connected in parallel.

[0099] Therefore, the first outlet air duct 312 and the second outlet air duct 313 can be arranged reasonably, which reduces the difficulty of arranging the first outlet air duct 312 and the second outlet air duct 313. The first outlet air duct 312 and the second outlet air duct 313 are connected in parallel to reduce the volume of the interface integrated structure 30, which is conducive to realizing its miniaturized design.

[0100] The inner diameter of the air inlet of the first outlet flow channel 312 is smaller than the inner diameter of the air outlet of the first outlet flow channel 312 .

[0101] It should be noted that the inner diameter of the air inlet of the first outlet flow channel 312 is relatively small, so that the air inlet of the first outlet flow channel 312 is formed as a flow limiting hole 3121. Therefore, when the solenoid valve closes the second outlet flow channel 313, the air inlet (flow limiting hole 3121) of the first outlet flow channel 312 with a smaller inner diameter can form a certain pressure in the molecular sieve assembly 20, so that the molecular sieve assembly 20 can adsorb the nitrogen in the air pumped into the air pump 10 to a certain extent. At this time, the gas with a higher oxygen concentration can be discharged from the oxygen outlet 302 through the first outlet flow channel 312 under the action of pressure.

[0102] Furthermore, when the solenoid valve opens the second outlet flow channel 313 , the pressure in the molecular sieve assembly 20 is reduced. At this time, part of the nitrogen adsorbed by the molecular sieve assembly 20 will be separated from the molecular sieve assembly 20 and discharged from the nitrogen outlet 303 through the second outlet flow channel 313 .

[0103] In some embodiments, the molecular sieve assembly 20 includes: a molecular sieve and a shell, wherein the molecular sieve is filled in the shell.

[0104] Therefore, it is convenient to utilize the shell to protect the molecular sieve, and it is convenient to fix the shell on the interface integrated structure 30, thereby reducing the volume of the oxygen concentration regulating device 100, facilitating its miniaturized design, so that it can be suitable for small household appliances.

[0105] For example Figure 3 As shown, the housing can be constructed as a molecular sieve tank 201, and the molecular sieve is filled in the molecular sieve tank 201 to control the volume of the molecular sieve tank 201, or as shown in FIG. Figure 6 As shown, the shell can be constructed as a flexible molecular sieve tube 202, and the molecular sieve is filled in the molecular sieve tube 202, so that the molecular sieve tube 202 can be reasonably arranged according to the arrangement requirements, making the layout of the molecular sieve tube 202 more reasonable.

[0106] Of course, the shell can also be constructed as other structures that meet the use requirements, which is not limited here.

[0107] The following is combined with Figure 1-Figure 6 A specific embodiment of the oxygen concentration regulating device 100 of the present invention is described as follows:

[0108] like Figure 1-Figure 6 As shown, the oxygen concentration regulating device 100 includes: an air pump 10, a molecular sieve component 20, an interface integrated structure 30 and a nitrogen switch 40.

[0109] The interface integrated structure 30 is provided with an air pump interface 304 and a molecular sieve assembly inlet 305, the air pump outlet 11 is connected to the air pump interface 304, the air pump interface 304 is connected to the molecular sieve assembly inlet 305, and the air inlet 21 of the molecular sieve assembly is suitable for being connected to the molecular sieve assembly inlet 305, so that the connection between the air pump 10 and the molecular sieve assembly 20 can be achieved through the air pump interface 304 and the molecular sieve assembly inlet 305 on the interface integrated structure 30.

[0110] Furthermore, the interface integrated structure 30 is provided with a built-in flow channel, and the built-in flow channel includes an air inlet channel connection, a first air outlet channel and a second air outlet channel.

[0111] Among them, the connecting inlet 301 is connected to the air outlet 22 of the molecular sieve assembly, the connecting inlet 301 is connected to the air inlet channel, the oxygen outlet 302 is connected to the air inlet channel through the first air outlet channel, the nitrogen outlet 303 is connected to the connecting inlet 301 through the second air outlet channel, and the nitrogen switch 40 is arranged between the nitrogen outlet 303 and the connecting inlet 301 to control the opening and closing of the second air outlet channel.

[0112] It should be noted that the air pump 10, the molecular sieve assembly 20 and the nitrogen switch 40 are all fixedly mounted on the interface integrated structure 30. In this way, the air pump 10, the molecular sieve assembly 20 and the nitrogen switch 40 can be reasonably installed on the gas path, effectively reducing the space required for the gas path pipeline connection in the related technology, so as to reduce the volume of the oxygen concentration regulating device 100, which is conducive to realizing its miniaturized design. When the regulating device 100 is applied to other structures such as cooking utensils 1000, it is not necessary to fix the air pump 10, the molecular sieve assembly 20 and the nitrogen switch 40 separately. The fixed assembly of the entire regulating device 100 can be achieved only by fixing the interface integrated structure 30, which is conducive to reducing the difficulty of assembly.

[0113] In actual use, the nitrogen switch 40 can be used to control the connection inlet 301 and the nitrogen outlet 303 to be disconnected, so that a certain pressure can be formed in the molecular sieve assembly 20. At this time, when the air pumped by the air pump 10 flows through the interior of the molecular sieve assembly 20, the molecular sieve in the molecular sieve assembly 20 can adsorb the nitrogen in the air to form a gas with a higher oxygen concentration.

[0114] Therefore, by controlling the connection inlet 301 and the nitrogen outlet 303 to be disconnected, a certain pressure can be formed in the molecular sieve component 20, and under the action of this pressure, the molecular sieve component 20 can better adsorb nitrogen in the air to facilitate the formation of gas with a higher oxygen concentration.

[0115] Next, when the pressure in the molecular sieve assembly 20 reaches a set value, since the oxygen outlet 302 is always connected to the connecting inlet 301 , at this time, the gas with a higher oxygen concentration will be discharged from the oxygen outlet 302 .

[0116] Then, the nitrogen switch 40 is used to control the connection of the connecting inlet 301 and the nitrogen outlet 303. In this way, after the connecting inlet 301 and the nitrogen outlet 303 are connected, it is equivalent to that the nitrogen outlet 303 is connected to the space in the molecular sieve component 20, so that the pressure in the molecular sieve component 20 is reduced, that is, it plays a role in pressure relief. At this time, the pressure in the molecular sieve component 20 gradually decreases, causing the nitrogen adsorbed in the molecular sieve component 20 to separate from the molecular sieve component 20 to form a gas with a higher nitrogen concentration, and the gas with a higher nitrogen concentration can be discharged from the nitrogen outlet 303.

[0117] Of course, the description of this specific embodiment is only a preferred embodiment and does not represent a limitation to this solution.

[0118] The present invention also provides a cooking appliance 1000 .

[0119] like Fig.10 As shown, the cooking appliance 1000 according to the embodiment of the present invention includes: a housing 200 and an oxygen concentration adjustment device 100 .

[0120] Specifically, a cooking space is provided in the housing 200 , the oxygen concentration adjusting device 100 is the oxygen concentration adjusting device 100 in any one of the above embodiments, and the oxygen concentration adjusting device 100 is installed in the housing 200 .

[0121] Thus, the oxygen concentration adjusting device 100 is installed in the housing 200 so that the oxygen concentration adjusting device 100 is not directly visible from the outside, thereby facilitating reduction in the volume of the cooking appliance 1000 .

[0122] Optionally, a filter 300 is further provided on the cooking utensil 1000 , and the filter 300 is connected to the air pump 10 so as to filter the air entering the air pump 10 to reduce impurities such as dust in the air, thereby improving the cleanliness of the air entering the air pump 10 .

[0123] For example, the cooking utensil 1000 may be an air fryer. Of course, the cooking utensil 1000 may also be other equipment for cooking food, which is not limited here.

[0124] The oxygen outlet 302 is opened toward the inside of the cooking space, and the nitrogen outlet 303 is opened toward the outside of the cooking space.

[0125] Thus, when the cooking appliance 1000 processes food, the preparation process of the gas with a high oxygen concentration is as follows: Fig.11As shown, the oxygen concentration regulating device 100 can utilize the oxygen outlet 302 to discharge the gas with a higher oxygen concentration into the cooking space, thereby regulating the concentration of oxygen and nitrogen in the air entering the cooking utensil 1000, thereby affecting the progress of the Maillard reaction, so as to improve the flavor and color of the cooked food, thereby enhancing the user experience.

[0126] Furthermore, the gas with a higher nitrogen concentration can be discharged outside the cooking space through the nitrogen outlet 303, thereby reducing the influence of the gas with a higher nitrogen concentration on the progress of the Maillard reaction.

[0127] According to the cooking appliance 1000 of the embodiment of the present invention, the oxygen concentration regulating device thereof can achieve regulation of the oxygen concentration of the gas discharged from the oxygen outlet 302 by providing a molecular sieve component, and can achieve control of nitrogen emission by providing a nitrogen switch 40 to control the opening and closing of the nitrogen outlet 303 through the nitrogen switch 40.

[0128] The invention also provides a control method for the oxygen concentration regulating device.

[0129] According to the control method of the oxygen concentration regulating device of the embodiment of the present invention, the control method is applied to the above-mentioned regulating device 100, and as Figure 7 As shown, the control method includes:

[0130] S10: Control the air pump 10 to start, and control the nitrogen switch 40 to close the nitrogen outlet 303.

[0131] It can be understood that by controlling the nitrogen switch 40 to close the nitrogen outlet 303, a certain pressure can be formed in the molecular sieve assembly 20. At this time, when the air pumped by the air pump 10 flows through the interior of the molecular sieve assembly 20, the molecular sieve in the molecular sieve assembly 20 can have a certain adsorption effect on the nitrogen in the air to form a gas with a higher oxygen concentration.

[0132] Therefore, by controlling the nitrogen switch 40 to close the nitrogen outlet 303, a certain pressure can be formed in the molecular sieve assembly 20, and under the action of the pressure, the molecular sieve assembly 20 can better adsorb nitrogen in the air to form a gas with a higher oxygen concentration.

[0133] S20: within a first set time, or when the pressure in the molecular sieve assembly 20 reaches a first set value, or when the oxygen concentration at the outlet of the molecular sieve assembly 20 reaches a first concentration value, high-concentration oxygen is controlled to be discharged from the oxygen outlet 302.

[0134] For example, during the first set time, high-concentration oxygen is controlled to be discharged from the oxygen outlet 302 .

[0135] Alternatively, when the pressure in the molecular sieve assembly 20 reaches a first set value, high-concentration oxygen is controlled to be discharged from the oxygen outlet 302 .

[0136] Alternatively, when the oxygen concentration at the gas outlet of the molecular sieve assembly 20 reaches a first concentration value, high-concentration oxygen is controlled to be discharged from the oxygen outlet 302 .

[0137] Therefore, when high-concentration oxygen is discharged from the oxygen outlet 302 , at least one of the above three conditions must be met, so as to control the high-concentration oxygen to be reasonably discharged from the oxygen outlet 302 .

[0138] S30: After the first set time, or when the pressure in the molecular sieve assembly 20 reaches the second set value, or when the oxygen concentration at the outlet of the molecular sieve assembly 20 reaches the second concentration value, the nitrogen switch 40 is controlled to open the nitrogen outlet 303, and the high-concentration nitrogen is controlled to be discharged from the nitrogen outlet 303.

[0139] It can be understood that when the nitrogen switch 40 is controlled to open the nitrogen outlet 303, it is equivalent to that the nitrogen outlet 303 is connected to the space in the molecular sieve assembly 20, so that the pressure in the molecular sieve assembly 20 is reduced, that is, it plays a role in pressure relief. At this time, the pressure in the molecular sieve assembly 20 gradually decreases, causing the nitrogen adsorbed in the molecular sieve assembly 20 to separate from the molecular sieve assembly 20 to form a gas with a higher nitrogen concentration, and the gas with a higher nitrogen concentration can be discharged from the nitrogen outlet 303.

[0140] For example, after a first set time, the nitrogen switch 40 is controlled to open the nitrogen outlet 303 , and high-concentration nitrogen is controlled to be discharged from the nitrogen outlet 303 .

[0141] Alternatively, when the pressure in the molecular sieve assembly 20 reaches the second set value, the nitrogen switch 40 is controlled to open the nitrogen outlet 303 , and the high-concentration nitrogen is controlled to be discharged from the nitrogen outlet 303 .

[0142] Alternatively, when the oxygen concentration at the gas outlet of the molecular sieve assembly 20 reaches a second concentration value, the nitrogen switch 40 is controlled to open the nitrogen outlet 303 , and high-concentration nitrogen is controlled to be discharged from the nitrogen outlet 303 .

[0143] Therefore, when the high-concentration nitrogen is discharged from the nitrogen outlet 303 , at least one of the above three conditions must be met, so as to control the high-concentration nitrogen to be reasonably discharged from the nitrogen outlet 303 .

[0144] In some embodiments, Figure 8 As shown, the control method also includes:

[0145] S40: After controlling the nitrogen switch 40 to open the nitrogen outlet 303 , before controlling the high-concentration nitrogen to be discharged from the nitrogen outlet 303 , the oxygen switch is turned off to close the oxygen outlet 302 .

[0146] Thus, the oxygen outlet 302 can be closed by the oxygen switch, so as to avoid the gas being erroneously discharged from the oxygen outlet 302 when the nitrogen outlet 303 is used to discharge the gas having a high nitrogen concentration.

[0147] The present invention also provides another control method for the oxygen concentration regulating device.

[0148] According to the control method of the oxygen concentration regulating device of the embodiment of the present invention, the control method is applied to the above-mentioned regulating device 100, and as Fig. 9 As shown, the control method includes:

[0149] S50: Control the air pump 10 to start, and control the nitrogen switch 40 to close the nitrogen outlet 303.

[0150] It can be understood that by controlling the nitrogen switch 40 to close the nitrogen outlet 303, a certain pressure can be formed in the molecular sieve assembly 20. At this time, when the air pumped by the air pump 10 flows through the interior of the molecular sieve assembly 20, the molecular sieve in the molecular sieve assembly 20 can adsorb the nitrogen in the air to form a gas with a higher oxygen concentration.

[0151] Therefore, by controlling the nitrogen switch 40 to close the nitrogen outlet 303, a certain pressure can be formed in the molecular sieve assembly 20, and under the action of the pressure, the molecular sieve assembly 20 can better adsorb nitrogen in the air to form a gas with a higher oxygen concentration.

[0152] S60: within a first set time, or when the pressure in the molecular sieve assembly 20 reaches a first set value, or when the oxygen concentration at the outlet of the molecular sieve assembly 20 reaches a first concentration value, controlling high-concentration oxygen to be discharged from the oxygen outlet 302.

[0153] For example, during the first set time, high-concentration oxygen is controlled to be discharged from the oxygen outlet 302 .

[0154] Alternatively, when the pressure in the molecular sieve assembly 20 reaches a first set value, high-concentration oxygen is controlled to be discharged from the oxygen outlet 302 .

[0155] Alternatively, when the oxygen concentration at the gas outlet of the molecular sieve assembly 20 reaches a first concentration value, high-concentration oxygen is controlled to be discharged from the oxygen outlet 302 .

[0156] Therefore, when high-concentration oxygen is discharged from the oxygen outlet 302 , at least one of the above three conditions must be met, so as to control the high-concentration oxygen to be reasonably discharged from the oxygen outlet 302 .

[0157] S70: After the first set time, or when the pressure in the molecular sieve assembly 20 reaches the second set value, or when the oxygen concentration at the outlet of the molecular sieve assembly 20 reaches the second concentration value, the nitrogen switch 40 is controlled to open the nitrogen outlet 303, the oxygen switch is turned off to close the oxygen outlet 302, and the high-concentration nitrogen is controlled to be discharged from the nitrogen outlet 303.

[0158] It can be understood that when the nitrogen switch 40 is controlled to open the nitrogen outlet 303, it is equivalent to that the nitrogen outlet 303 is connected to the space in the molecular sieve assembly 20, so that the pressure in the molecular sieve assembly 20 is reduced, that is, it plays a role in pressure relief. At this time, the pressure in the molecular sieve assembly 20 gradually decreases, causing the nitrogen adsorbed in the molecular sieve assembly 20 to separate from the molecular sieve assembly 20 to form a gas with a higher nitrogen concentration, and the gas with a higher nitrogen concentration can be discharged from the nitrogen outlet 303.

[0159] For example, after a first set time, the nitrogen switch 40 is controlled to open the nitrogen outlet 303 , and high-concentration nitrogen is controlled to be discharged from the nitrogen outlet 303 .

[0160] Alternatively, when the pressure in the molecular sieve assembly 20 reaches the second set value, the nitrogen switch 40 is controlled to open the nitrogen outlet 303 , and the high-concentration nitrogen is controlled to be discharged from the nitrogen outlet 303 .

[0161] Alternatively, when the oxygen concentration at the gas outlet of the molecular sieve assembly 20 reaches a second concentration value, the nitrogen switch 40 is controlled to open the nitrogen outlet 303 , and high-concentration nitrogen is controlled to be discharged from the nitrogen outlet 303 .

[0162] Therefore, when the high-concentration nitrogen is discharged from the nitrogen outlet 303 , at least one of the above three conditions must be met, so as to control the high-concentration nitrogen to be reasonably discharged from the nitrogen outlet 303 .

[0163] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0164] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0165] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0166] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0167] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0168] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An oxygen concentration regulating device, characterized in that: include: air pump; A molecular sieve assembly, wherein the air pump is connected to the molecular sieve assembly; An oxygen outlet, one end of which is connected to the gas outlet of the molecular sieve assembly, and the other end of which is connected to the outside; A nitrogen outlet, one end of which is connected to the gas outlet of the molecular sieve assembly, and the other end of which is connected to the outside; A nitrogen switch is used to control the opening and closing of the nitrogen outlet.

2. The oxygen concentration regulating device according to claim 1, characterized in that: The cross-sectional area of ​​the oxygen outlet is smaller than the cross-sectional area of ​​the nitrogen outlet.

3. The oxygen concentration regulating device according to claim 2, characterized in that: It also includes an oxygen switch, which is used to control the opening and closing of the oxygen outlet.

4. The oxygen concentration regulating device according to claim 1, characterized in that: The cross-sectional area of ​​the oxygen outlet is not less than the cross-sectional area of ​​the nitrogen outlet. The oxygen concentration regulating device further comprises an oxygen switch, which is used to control the opening and closing of the oxygen outlet.

5. The oxygen concentration regulating device according to any one of claims 1 to 4, characterized in that: The oxygen concentration regulating device also includes: An interface integrated structure, wherein the interface integrated structure is provided with a built-in flow channel, the built-in flow channel has a connecting inlet, the connecting inlet is communicated with the gas outlet of the molecular sieve component, the oxygen outlet and the nitrogen outlet are both communicated with the built-in flow channel, and the oxygen outlet and the nitrogen outlet are respectively communicated with the outside of the interface integrated structure.

6. The oxygen concentration regulating device according to claim 5, characterized in that: The built-in flow channel includes an inlet flow channel, a first outlet flow channel and a second outlet flow channel, the connecting inlet is communicated with the inlet flow channel, the first outlet flow channel is communicated between the inlet flow channel and the oxygen outlet, and the second outlet flow channel is communicated between the inlet flow channel and the nitrogen outlet.

7. The oxygen concentration regulating device according to claim 5, characterized in that: The nitrogen switch and / or the oxygen switch is a solenoid valve.

8. The oxygen concentration regulating device according to claim 6, characterized in that: An inner diameter of an air inlet of the first outlet flow channel is smaller than an inner diameter of an air outlet of the first outlet flow channel.

9. The oxygen concentration regulating device according to claim 5, characterized in that: The molecular sieve assembly comprises: a molecular sieve and a shell, wherein the molecular sieve is filled in the shell.

10. A cooking utensil, characterized in that: include: A shell, wherein a cooking space is provided in the shell; An oxygen concentration regulating device, wherein the oxygen concentration regulating device is the oxygen concentration regulating device according to any one of claims 1 to 9, and the oxygen concentration regulating device is installed in the housing; The oxygen outlet opens toward the inside of the cooking space, and the nitrogen outlet opens toward the outside of the cooking space.

11. A control method for an oxygen concentration regulating device, characterized in that: The control method is applied to the above claims 1-3, 5-10, and the control method comprises: Controlling the air pump to start, and controlling the nitrogen switch to close the nitrogen outlet; Within a first set time, or when the pressure in the molecular sieve assembly reaches a first set value, or when the oxygen concentration at the gas outlet of the molecular sieve assembly reaches a first concentration value, controlling high-concentration oxygen to be discharged from the oxygen outlet; After a first set time, or when the pressure in the molecular sieve assembly reaches a second set value, or when the oxygen concentration at the outlet of the molecular sieve assembly reaches a second concentration value, the nitrogen switch is controlled to open the nitrogen outlet, and high-concentration nitrogen is controlled to be discharged from the nitrogen outlet.

12. The control method of the oxygen concentration regulating device according to claim 11, characterized in that: The control method further comprises: After controlling the nitrogen switch to open the nitrogen outlet, and before controlling the high-concentration nitrogen to be discharged from the nitrogen outlet, the oxygen switch is turned off to close the oxygen outlet.

13. A control method for an oxygen concentration regulating device, characterized in that: The control method is applied to the above claims 1, 4, 5-10, and the control method comprises: Controlling the air pump to start, and controlling the nitrogen switch to close the nitrogen outlet; Within a first set time, or when the pressure in the molecular sieve assembly reaches a first set value, or when the oxygen concentration at the gas outlet of the molecular sieve assembly reaches a first concentration value, controlling high-concentration oxygen to be discharged from the oxygen outlet; After a first set time, or when the pressure in the molecular sieve assembly reaches a second set value, or when the oxygen concentration at the outlet of the molecular sieve assembly reaches a second concentration value, the nitrogen switch is controlled to open the nitrogen outlet, and the oxygen switch is closed to close the oxygen outlet, and high-concentration nitrogen is controlled to be discharged from the nitrogen outlet.

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