A steaming and baking device with an oxygen sensor and its control method

Abstract

The present invention discloses a steaming and baking device with an oxygen sensor and its control method. The steaming and baking device includes an inner container and an oxygen sensor, and the oxygen sensor is arranged on the inner container. The oxygen sensor includes a chip, a housing, and a heating housing, wherein the chip is arranged inside the housing, and the heating housing is arranged outside the housing at the detection end of the chip, which can reduce the influence of oil stains and condensed water on the oxygen sensor and prolong the service life of the oxygen sensor at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular, to a steaming and baking device with an oxygen sensor and a control method thereof. Background Art

[0002] In the related art, during the cooking process of a steaming and baking device, it is necessary to control the cooking humidity according to different ingredients to control the taste of the ingredients. However, the maximum temperature of the steaming and baking device can reach 250°C, and conventional humidity sensors are difficult to meet the temperature resistance requirements.

[0003] Currently on the market, an oxygen sensor is used to detect the change in oxygen concentration to indirectly reflect the change in water vapor concentration. However, there is a lot of oil fume and condensed water in the steaming and baking device. After long-term cooking, oil stains adhere to the ceramic chip of the oxygen sensor, which will affect the detection accuracy of the ceramic chip. And when the ceramic chip heats up to ionize O2 at high temperature, if condensed water splashes onto the high-temperature ceramic chip at this time, it may cause the ceramic chip to crack and be damaged.

[0004] In addition, currently on the market, when the steaming and baking device is cooking, the oxygen sensor is turned on, and its own high temperature is used to reduce the influence of oil stains and water vapor. However, this will cause the service life of the oxygen sensor to decrease. Summary of the Invention

[0005] The present invention aims to solve at least one of the problems existing in the related art to some extent. For this reason, the present invention provides a steaming and baking device with an oxygen sensor, which can reduce the influence of oil stains and condensed water on the oxygen sensor and extend the service life of the oxygen sensor at the same time.

[0006] The above object is achieved by the following technical solutions:

[0007] A steaming and baking device with an oxygen sensor includes an inner container, an oxygen sensor, and a steam generator. The oxygen sensor is arranged on the inner container. The steam outlet of the steam generator is connected to the steam inlet of the inner container. The oxygen sensor includes a chip, a housing, and a heating housing. The chip is arranged inside the housing, and the heating housing is arranged outside the housing at the detection end of the chip.

[0008] In some embodiments, a first through hole is arranged on the housing at the detection end of the chip, and a second through hole is arranged on the heating housing. The positions of the first through hole and the second through hole are offset.

[0009] In some embodiments, a flange is sleeved outside the housing. The flange is connected to the inner container. A magnetic ring is arranged at one end of the heating housing facing the flange. The heating housing is fixed to the flange through the magnetic ring.

[0010] In some embodiments, the heating housing includes a housing and a heating member disposed within the housing. A spring probe electrode is provided on the flange, and the positive electrode and the negative electrode of the heating member are respectively connected to the corresponding spring probe electrodes.

[0011] In some embodiments, an insulating fixing seat is provided within the outer housing for fixing the chip.

[0012] In some embodiments, high-temperature sealant is provided within the outer housing at one end of the insulating fixing seat close to the detection end of the chip.

[0013] In some embodiments, an insulating terminal is provided within the outer housing. The wiring terminal of the chip is connected to the insulating terminal, and the signal output terminal of the insulating terminal extends outwards through the outer housing.

[0014] In some embodiments, a necking is provided at the end of the outer housing away from the heating housing. The signal output terminal of the insulating terminal extends outwards through the necking, and high-temperature silica gel is provided within the necking.

[0015] In addition, the present invention provides a control method for a steaming and baking device having an oxygen sensor, which can reduce the influence of oil stains and condensed water on the oxygen sensor and simultaneously extend the service life of the oxygen sensor.

[0016] The above object is achieved by the following technical solutions:

[0017] A control method for a steaming and baking device having an oxygen sensor, applied to the steaming and baking device as described above. The control method includes the following steps:

[0018] S101, determine the cooking mode selected by the user. If the user selects the pure baking mode, go to step S102. If the user selects the pure steaming mode or the steaming and baking mode, go to step S103;

[0019] S102, control the heating housing to operate;

[0020] S103, control the chip and the heating housing to operate.

[0021] In some embodiments, step S103 includes:

[0022] Set a preset humidity;

[0023] Control the chip to start heating operation;

[0024] Control the heating housing to perform working heating;

[0025] Control the steaming and baking device to start cooking;

[0026] Control the operation of the steam cooking device to maintain the oxygen concentration in the inner cavity at a preset oxygen concentration, where the preset oxygen concentration corresponds to a preset humidity;

[0027] End cooking.

[0028] In some embodiments, after steps S102 and S103, the following steps are included:

[0029] S104, after opening the door of the steam cooking device, control the heating housing to close with a delay.

[0030] Compared with the prior art, the present invention has at least the following beneficial effects:

[0031] 1. The present invention provides a steam cooking device with an oxygen sensor, which can reduce the influence of oil stains and condensate on the oxygen sensor and extend the service life of the oxygen sensor at the same time.

[0032] 2. The present invention provides a control method for a steam cooking device with an oxygen sensor, which can reduce the influence of oil stains and condensate on the oxygen sensor and extend the service life of the oxygen sensor at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic structural diagram of the steam cooking device in the embodiment;

[0034] Figure 2 is a three-dimensional schematic diagram of the oxygen sensor in the embodiment;

[0035] Figure 3 is an exploded schematic diagram of the oxygen sensor in the embodiment;

[0036] Figure 4 is another exploded schematic diagram of the oxygen sensor in the embodiment;

[0037] Figure 5 is a schematic structural diagram of the oxygen sensor in the embodiment;

[0038] Figure 6 is a schematic flow diagram of the control method in the embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The following embodiments are used to illustrate the present invention, but the present invention is not limited by these embodiments. Modifying the specific embodiments of the present invention or equivalently replacing some technical features without departing from the spirit of the present invention shall be covered within the scope of the technical solution claimed by the present invention.

[0040] Embodiment 1: As Figures 1 to 5As shown in the figure, this embodiment provides a steaming and baking device with an oxygen sensor, which includes an inner container 1, an oxygen sensor 2, and a steam generator. The oxygen sensor 2 is arranged on the inner container 1. The steam outlet of the steam generator is connected to the steam inlet of the inner container 1. The oxygen sensor 2 includes a chip 21, a housing 22, and a heating housing 23. The chip 21 is arranged inside the housing 22, and the heating housing 23 is arranged outside the housing 22 at the detection end of the chip 21.

[0041] In the steaming and baking device with an oxygen sensor of this embodiment, the arranged heating housing 23 can reduce the influence of oil stains and condensed water on the oxygen sensor during cooking, and can delay high-temperature heating after cooking to carbonize the oil stains and complete self-cleaning.

[0042] In addition, the running time of the oxygen sensor chip can be reduced, achieving the effect of extending the service life.

[0043] In this embodiment, a first through hole 220 is arranged on the housing 22 outside the detection end of the chip 21, and a second through hole 230 is arranged on the heating housing 23. The positions of the first through hole 220 and the second through hole 230 are staggered. By using the arranged heating housing 23 as the first protection and the housing 22 as the second protection, this can effectively protect and prevent water or oil during the cooking process from splashing onto the ceramic chip 21, which may cause the ceramic chip 21 to crack. The second through hole 230 of the heating housing 23 is staggered from the first through hole 220 of the housing 22, so that water or oil during the cooking process splashes onto the ceramic chip 21. In addition, the oil stains and condensed water attached to the inner wall of the heating housing 23 and the second through hole 230 will be carbonized and evaporated under the high temperature of the heating housing 23, thereby achieving the self-cleaning effect.

[0044] Preferably, a flange 24 is sleeved outside the housing 22. The flange 24 is connected to the inner container 1. A magnetic ring 25 is arranged at one end of the heating housing 23 facing the flange 24. The heating housing 23 is fixed to the flange 24 through the magnetic ring 25. Its structure is simple, which is convenient for fixing the heating housing 23 and the housing 22 together and is beneficial to improving the assembly and disassembly efficiency of the product. During installation, the oxygen sensor is directly installed on the inner container 1 of the steaming and baking device and is connected to the flange 24 through screws to fix the flange 24 inside the inner container 1. The flange 24 is used for the adsorption of the magnetic ring 25 on the heating housing 23 to achieve the function of fixing the heating housing 23. In addition, a sealing gasket 4 is arranged between the flange 24 and the inner side of the inner container 1, which can improve the sealing performance between the flange 24 and the inner container 1 to a certain extent.

[0045] In this embodiment, the heating housing 23 includes a housing 231 and a heating member 232 disposed within the housing 231. Preferably, the housing 231 has an inner cavity that is open at one end facing the flange 24. Thus, when the housing 231 is fixed to the flange 24 by the magnetic ring 25, a relatively enclosed cavity is formed, which can further improve the protection of the oxygen sensor. Preferably, the heating member 232 is a heating wire that is wound around the inside of the housing 231, which can further reduce the influence of oil stains and condensed water on the oxygen sensor and can perform delayed high-temperature heating after cooking to carbonize the oil stains and complete self-cleaning.

[0046] Further, a spring needle electrode 3 is provided on the flange 24. The positive electrode 2321 and the negative electrode 2322 of the heating member 232 are respectively connected to the corresponding spring needle electrodes 3. The positive and negative electrodes of the heating member 232 are in contact with the spring needle electrodes 3 on the flange 24 for energized heating, which facilitates disassembly, wiping, or replacement.

[0047] In this embodiment, an insulating fixing seat 26 is provided inside the outer housing 22 to fix the chip 21, which facilitates the fixation of the chip 21 and can improve the stability and reliability of the chip 21 to a certain extent.

[0048] Preferably, a high-temperature sealant 27 is provided inside the outer housing 22 at one end of the insulating fixing seat 26 close to the detection end of the chip 21, which can seal other components such as the insulating terminal 28 inside the outer housing 22 to prevent the high-temperature steam inside the inner tank 1 from affecting or damaging other components such as the insulating terminal 28 inside the outer housing 22, thereby achieving the purpose of improving the stability and reliability of the oxygen sensor's operation and extending the service life of the oxygen sensor.

[0049] Further, an insulating terminal 28 is provided inside the outer housing 22. The wiring terminal of the chip 21 is connected to the insulating terminal 28, and the signal output terminal 281 of the insulating terminal 28 extends outwards through the outer housing 22. By providing the insulating terminal 28 and the signal output terminal 281, it is convenient to output the detection signal of the chip 21 outwards, improving the convenience of external connection of the oxygen sensor and the reliability of the detection signal output.

[0050] In this embodiment, a necking 220 is provided at the end of the outer housing 22 away from the heating housing 23. The signal output terminal 281 of the insulating terminal 28 extends outwards through the necking 220, and a high-temperature silica gel 221 is provided inside the necking 220. By providing the necking 220 and the high-temperature silica gel 221, the protection of the components inside the oxygen sensor can be improved to a certain extent, achieving the purpose of improving the reliability of the oxygen sensor's use and extending the service life of the oxygen sensor.

[0051] Embodiment Two: As Figures 1 to 6As shown in the figure, this embodiment provides a control method for a steaming and baking device with an oxygen sensor, which is applied to the steaming and baking device described in Embodiment 1. The control method includes the following steps:

[0052] S101, determine the cooking mode selected by the user. If the user selects the pure baking mode, go to step S102; if the user selects the pure steaming mode or the steaming and baking mode, go to step S103;

[0053] S102, control the heating housing to work;

[0054] S103, control the chip and the heating housing to work.

[0055] This embodiment provides a control method for a steaming and baking device with an oxygen sensor, which can reduce the influence of oil stains and condensed water on the oxygen sensor, and at the same time extend the service life of the oxygen sensor.

[0056] Specifically, in the pure baking mode, only the heating housing 23 is turned on to reduce the influence of oil stains and condensed water on the ceramic chip 21, without starting the heating of the ceramic chip 21, reducing the usage time of the ceramic chip 21 and extending its service life.

[0057] Further, step S103 includes:

[0058] Set a preset humidity;

[0059] Control the ceramic chip 21 to start heating and running;

[0060] Control the heating housing 23 to work and heat at the same time to reduce the influence of oil stains or condensed water on the ceramic chip 21;

[0061] Control the steaming and baking device to start cooking;

[0062] Control the steaming and baking device to work. Specifically, by controlling the steam generation amount of the steaming and baking device, the oxygen concentration in the inner container is maintained at a preset oxygen concentration. The preset oxygen concentration corresponds to the preset humidity. Specifically, when the user sets the preset humidity, the steaming and baking device can calculate the preset oxygen concentration corresponding to the preset humidity according to the user's setting;

[0063] End cooking.

[0064] The above steps detect the oxygen concentration in the inner container through the oxygen sensor, and by controlling the steam generation amount of the steaming and baking device to maintain the oxygen concentration in the inner container at the preset oxygen concentration, the humidity in the inner container can be maintained at the preset humidity. Its design is reasonable and ingenious, and it can accurately detect the change of the water vapor concentration in the inner container to control the steam generation amount of the steaming and baking device, thereby achieving a better cooking effect.

[0065] In some embodiments, after step S102 and step S103, the following steps are included:

[0066] S104, after opening the door of the steaming and baking device, control the heating housing to close with a delay

[0067] After cooking is completed, the ceramic chip 21 can be turned off, and the heating housing 23 closes with a delay after the door of the steaming and baking device is opened, avoiding the influence of oil stains and water vapor after completion.

[0068] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several deformations and improvements can be made, and these all belong to the protection scope of the present invention.

Claims

1. A control method for a steaming and baking device with an oxygen sensor, the steaming and baking device comprising an inner container (1), an oxygen sensor (2) and a steam generator, the oxygen sensor (2) being disposed on the inner container (1), and an outlet of the steam generator being connected to an inlet of the inner container (1), characterized in that, The oxygen sensor (2) comprises a chip (21), a shell (22) and a heating shell (23), wherein the chip (21) is arranged inside the shell (22), the heating shell (23) is arranged outside the shell (22) outside the detection end of the chip (21), a first through hole (220) is arranged on the shell (22) outside the detection end of the chip (21), and a second through hole (230) is arranged on the heating shell (23); The control method comprises the following steps: S101, judging the cooking mode selected by the user, if the user selects the pure baking mode, then entering step S102, if the user selects the pure steaming mode or the steaming and baking mode, then entering step S103; S102, only controlling the heating shell to work; S103, the control chip and the heating shell work.

2. The control method of a steaming and baking device with an oxygen sensor according to claim 1, wherein, The positions of the first through hole (220) and the second through hole (230) are staggered.

3. The control method of a steaming and baking device with an oxygen sensor according to claim 1, characterized in that A flange (24) is provided on the outer shell of the shell (22), and the flange (24) and the inner tank (1) are connected together. A magnetic ring (25) is provided on one end of the heating shell (23) facing the flange (24), and the heating shell (23) is fixed together with the flange (24) through the magnetic ring (25).

4. The control method of a steaming and baking device with an oxygen sensor according to claim 3, characterized in that, The heating shell (23) comprises a shell (231) and a heating component (232) arranged in the shell (231); a spring-loaded needle electrode (3) is arranged on the flange (24); and a positive electrode (2321) and a negative electrode (2322) of the heating component (232) are respectively connected to the corresponding spring-loaded needle electrode (3).

5. The control method of a steaming and baking device with an oxygen sensor according to claim 1, characterized in that, An insulating fixing seat (26) is provided in the housing (22) for fixing the chip (21).

6. The control method of a steaming and baking device with an oxygen sensor according to claim 5, characterized in that, A high-temperature sealant (27) is provided at one end of the insulating fixing seat (26) close to the detection end of the chip (21) and inside the housing (22).

7. The control method of a steaming and baking device with an oxygen sensor according to any one of claims 1 to 6, characterized in that, An insulating terminal (28) is arranged in the housing (22), the connection terminal of the chip (21) is connected to the insulating terminal (28), and the signal output terminal (281) of the insulating terminal (28) extends outward through the housing (22).

8. The control method of a steaming and baking device with an oxygen sensor according to claim 7, characterized in that, A closing opening is provided at the end of the housing (22) away from the heating shell (23), the signal output terminal (281) of the insulating terminal (28) protrudes outward through the closing opening, and high-temperature silica gel (221) is provided in the closing opening.

9. The control method of a steaming and baking device with an oxygen sensor according to claim 1, characterized in that, Step S103 includes: Set preset humidity; The control chip starts heating operation; Controlling the heating shell to perform working heating; Control the steaming and baking equipment to start cooking; Controlling the steaming and baking equipment to maintain the oxygen concentration in the inner pot at a preset oxygen concentration, wherein the preset oxygen concentration corresponds to the preset humidity; Cooking ends and the chip ends heating operation.

10. The control method of a steaming and baking device with an oxygen sensor according to claim 1 or 9, characterized in that, After step S102 and step S103, the following steps are included: S104, after the door of the steaming and baking device is opened, controlling the heating shell to close with a delay.

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