Steam oven with humidity detection device and control method thereof

Abstract

The present invention proposes a steam oven with a humidity detection device and a control method thereof, comprising a box shell, an inner cavity, an exhaust device and an exhaust pipe assembly, wherein the exhaust pipe assembly comprises a main exhaust pipe, a first exhaust branch pipe and a second exhaust branch pipe, the air inlet end of the main exhaust pipe is connected to the inner cavity, the air outlet end of the main exhaust pipe is connected to the air inlet end of the first exhaust branch pipe and the air inlet end of the second exhaust branch pipe respectively, a steam dilution detection area is provided on the first exhaust branch pipe, and a humidity detection device is provided in the steam dilution detection area. The exhaust pipe assembly is arranged between the inner cavity and the box shell, and the humidity detection device is arranged on the first exhaust branch pipe of the exhaust pipe assembly, so as to avoid the influence of the high temperature environment of the inner cavity on the humidity detection device, so that the humidity detection device is suitable for high temperature cooking occasions.

Description

Technical Field

[0001] The invention relates to the technical field of steam ovens, and in particular to a steam oven with a humidity detection device and a control method thereof. Background Art

[0002] In the existing steam oven cooking mode, the main focus is on controlling the temperature of the inner cavity. Especially in the food cooking mode, the humidity parameters and temperature parameters in the inner cavity are not combined for comprehensive control. Therefore, for foods that require high humidity control, the taste is often not good after cooking, resulting in a poor user experience. In addition, the current sensors used for humidity detection in household steam ovens can adapt to low working environment temperatures and have a relatively small detection range, which cannot meet the requirements of high-temperature baking, high-humidity and other cooking occasions. Summary of the invention

[0003] The present invention aims to solve one of the problems existing in the prior art to a certain extent. To this end, one object of the present invention is to provide a steaming oven with a humidity detection device, wherein the humidity detection device arranged thereon is suitable for high temperature cooking occasions.

[0004] The above purpose is achieved through the following technical solutions:

[0005] A steam oven with a humidity detection device comprises a box shell, an inner cavity, an exhaust device and an exhaust pipe assembly, wherein the inner cavity is arranged in the box shell, the exhaust device is arranged on the inner cavity, the air inlet end of the exhaust device is connected with the inner cavity through the exhaust pipe assembly, the exhaust pipe assembly is arranged between the inner cavity and the box shell, the exhaust pipe assembly comprises a main exhaust pipe, a first exhaust branch pipe and a second exhaust branch pipe, the air inlet end of the main exhaust pipe is connected with the inner cavity, the air outlet end of the main exhaust pipe is connected with the air inlet end of the first exhaust branch pipe and the air inlet end of the second exhaust branch pipe respectively, a steam dilution detection area is provided on the first exhaust branch pipe, and a humidity detection device is provided in the steam dilution detection area.

[0006] As a further improvement of the present invention, the inner diameter cross-sectional area of ​​the main exhaust pipe is smaller than the sum of the inner diameter cross-sectional area of ​​the first exhaust branch pipe and the second exhaust branch pipe, and the inner diameter cross-sectional area of ​​the second exhaust branch pipe is larger than the inner diameter cross-sectional area of ​​the first exhaust branch pipe.

[0007] As a further improvement of the present invention, the inner diameter of the main exhaust pipe is greater than or equal to 12 mm, the inner diameter of the first exhaust branch pipe is greater than or equal to 6 mm, and the inner diameter of the second exhaust branch pipe is greater than or equal to 11 mm.

[0008] As a further improvement of the present invention, the maximum inner diameter of the steam dilution detection zone is 1.5 times or more of the inner diameter of the first exhaust branch pipe.

[0009] As a further improvement of the present invention, the humidity detection device is arranged perpendicular to the steam flow direction in the steam dilution detection area.

[0010] As a further improvement of the present invention, the humidity detection device is arranged at the location where the inner diameter of the steam dilution detection zone is the largest, and is arranged at a position close to the rear end of the first exhaust branch pipe.

[0011] Another object of the present invention is to provide a control method for a steam oven to achieve precise control of the humidity in the inner cavity.

[0012] The above purpose is achieved through the following technical solutions:

[0013] A control method for a steam oven is applied to a steam oven with a humidity detection device as mentioned above, comprising:

[0014] The steam oven enters the preheat cooking mode;

[0015] Divide the entire cycle of humidity control in the steam oven cavity into several humidity control intervals;

[0016] Control the humidity in each humidity control interval;

[0017] Implement humidity control on the current humidity control interval, compare the preset humidity control result of the current humidity control interval with the implementation result, and generate the control logic for the next humidity control interval;

[0018] Execute the corresponding control logic for the next humidity control interval;

[0019] Determine whether it is the last humidity control interval;

[0020] If it is the last humidity control interval, then all humidity control intervals are completed.

[0021] As a further improvement of the present invention, humidity control is implemented in the current humidity control interval, and the preset humidity control result of the current humidity control interval is compared with the implementation result, and the control logic for generating the next humidity control interval is specifically as follows:

[0022] If the implementation result is within ±5%-10% of the preset humidity control result, it will run according to the current parameter settings;

[0023] If the implementation result is greater than 105%-110% of the preset humidity control result, the evaporator heating time and heating interval time of the steam oven are maintained, and the fan speed of the steam oven is increased by 10%-20%;

[0024] If the implementation result is less than 90%-95% of the preset humidity control result, the evaporator heating time and heating interval time of the steam oven are maintained, and the fan speed of the steam oven is reduced by 10%-20%.

[0025] As a further improvement of the present invention, the step of detecting whether it is the last humidity control cycle is specifically as follows: if it is not the last humidity control interval, humidity control is implemented on the current humidity control interval, and the preset humidity control result of the current humidity control interval is compared with the implementation result to generate the control logic of the next humidity control interval; if it is the last humidity control interval, the execution of all humidity control intervals is completed.

[0026] As a further improvement of the present invention, the plurality of humidity control intervals are humidity control intervals with equal time.

[0027] Compared with the prior art, the present invention has at least the following beneficial effects:

[0028] 1. The present invention proposes a steam oven with a humidity detection device, wherein the exhaust pipe assembly is arranged between the inner cavity and the outer shell of the box body, and the humidity detection device is arranged on the first exhaust branch pipe of the exhaust pipe assembly, thereby avoiding the influence of the high temperature environment of the inner cavity on the humidity detection device, so that the humidity detection device is suitable for high-temperature cooking occasions.

[0029] 2. The present invention proposes a control method for a steam oven to achieve precise control of the humidity in the inner cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a steam oven with a humidity detection device in an embodiment;

[0031] Figure 2 is a schematic structural diagram of an exhaust pipe assembly in an embodiment;

[0032] Figure 3 The figure is a flow chart of a control method of a steam oven in an embodiment. DETAILED DESCRIPTION

[0033] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacement of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed by the present invention.

[0034] Embodiment 1:

[0035] See attached Figure 1-2A steam oven with a humidity detection device of the present invention is shown, comprising a box shell 1, an inner cavity 2, an exhaust device 3 and an exhaust pipe assembly 4, wherein the inner cavity 2 is arranged in the box shell 1, the exhaust device 3 is arranged on the inner cavity 2, the air inlet end of the exhaust device 3 is connected with the inner cavity 2 through the exhaust pipe assembly 4, the exhaust pipe assembly 4 is arranged between the inner cavity 2 and the box shell 1, the exhaust pipe assembly 4 comprises a main exhaust pipe 41, a first exhaust branch pipe 42 and a second exhaust branch pipe 43, the air inlet end of the main exhaust pipe 41 is connected with the inner cavity 2, an inner cavity exhaust joint is provided at the connection between the main exhaust pipe 41 and the inner cavity 2, the air outlet end of the main exhaust pipe 41 is connected with the air inlet end of the first exhaust branch pipe 42 and the air inlet end of the second exhaust branch pipe 43 respectively, a steam dilution detection area 44 is provided on the first exhaust branch pipe 42, and a humidity detection device 45 is provided in the steam dilution detection area 44. The steam in the inner cavity 2 is discharged from the inner cavity 2 of the steam oven to the exhaust pipe assembly 4 under the negative pressure of the fan assembly 31, and then discharged from the exhaust pipe assembly 4 to the outside of the box shell 1 through the exhaust device 3. The humidity detection device 45 does not need to be installed in the inner cavity 2, so that the high temperature of the inner cavity 2 is avoided from affecting the humidity detection device 45.

[0036] The exhaust device 3 includes a fan assembly 31 and an exhaust hood 32. The outlet ends of the first exhaust branch pipe 42 and the second exhaust branch pipe 43 are connected to the exhaust hood 32. One end of the exhaust hood 32 is connected to the fan assembly 31, and the other end is connected to the box shell 1. Under the action of the fan, the steam exhausted from the inner cavity 2 is discharged to the main exhaust pipe 41, and is discharged from the main exhaust pipe 41 to the first exhaust branch pipe 42 or the second exhaust branch pipe 43, and is collected in the exhaust hood through the first exhaust branch pipe 42 and the second exhaust branch pipe 43, and is discharged to the outside of the box shell 1 through the exhaust hood 32.

[0037] The main exhaust pipe 41, the first exhaust branch pipe 42 and the second exhaust branch pipe 43 are in a "Y"-shaped pipeline, so as to realize the diversion of the exhaust steam and reduce the exhaust temperature.

[0038] The inner diameter cross-sectional area of ​​the main exhaust pipe 41 is smaller than the sum of the inner diameter cross-sectional areas of the first exhaust branch pipe 42 and the second exhaust branch pipe 43 to reduce the steam discharge resistance, and the inner diameter cross-sectional area of ​​the second exhaust branch pipe 43 is larger than the inner diameter cross-sectional area of ​​the first exhaust branch pipe 42. Most of the steam entering the main exhaust pipe 41 enters the second exhaust branch pipe 43, and the remaining part enters the first exhaust branch pipe 42, so as to achieve flow diversion.

[0039] The inner diameter of the main exhaust pipe 41 is greater than or equal to 12 mm to ensure the exhaust area of ​​the smoke. The inner diameter of the first exhaust branch pipe 42 is greater than or equal to 6 mm, and the inner diameter of the second exhaust branch pipe 43 is greater than or equal to 11 mm to prevent condensed water from accumulating and blocking the pipeline. In this embodiment, the inner diameter of the main exhaust pipe 41 is 12 mm, the inner diameter of the first exhaust branch pipe 42 is 6 mm, and the inner diameter of the second exhaust branch pipe 43 is 11 mm.

[0040] The steam dilution detection area 44 includes a steam dilution detection area body and a connection part. The steam dilution detection area body is connected to the first exhaust branch pipe 42 through the connection part. The inner diameter of the connection part gradually decreases from the steam dilution detection area body to the first exhaust branch pipe 42. The maximum inner diameter of the steam dilution detection area 44 is 1.5 times or more of the inner diameter of the first exhaust branch pipe 42. In this embodiment, the maximum inner diameter of the steam dilution detection area 44 is 1.5 times the inner diameter of the first exhaust branch pipe 42. By increasing the volume of the steam dilution detection area 44 to reduce the humidity of the steam dilution detection area 44, the detection range of the humidity detection device 45 is reduced.

[0041] The humidity detection device 45 is arranged perpendicular to the steam flow direction in the steam dilution detection area 44 .

[0042] The humidity detection device 45 is arranged at the place where the inner diameter of the steam dilution detection area 44 is larger, and is arranged near the rear end of the first exhaust branch pipe 42. This further reduces the humidity, temperature and flow rate of the steam after diversion, so that the humidity detection device 45 can effectively detect the humidity at a slow steam flow rate and avoid the humidity being too high and exceeding the range of the humidity detection device 45.

[0043] The steam oven also includes an evaporator 5 and an evaporation pipeline 6, which are arranged between the inner cavity 2 and the cabinet shell 1. One end of the evaporation pipeline 6 is connected to the evaporator 5, and the other end is connected to the inner cavity 2. The steam generated by the evaporator 5 enters the inner cavity 2 through the evaporation pipeline 6.

[0044] Embodiment 2:

[0045] See attached Figure 3 A control method for a steam oven is shown, which is applied to a steam oven with a humidity detection device as mentioned above, comprising:

[0046] The steam oven enters the preheating cooking mode S1;

[0047] The whole cycle of humidity control in the steam oven cavity is divided into a number of humidity control intervals S2;

[0048] Perform humidity control S3 on the current humidity control interval;

[0049] Compare the preset humidity control result of the current humidity control interval with the implementation result to generate the control logic S4 for the next humidity control interval;

[0050] Execute the corresponding control logic S5 for the next humidity control interval;

[0051] Determine whether it is the last humidity control interval S6;

[0052] If it is the last humidity control interval, all humidity control intervals are executed and ended in S7.

[0053] The plurality of humidity control intervals are humidity control intervals of equal duration, and can be divided into 2, 3, or 4 humidity control intervals of equal duration.

[0054] At present, when the steam oven is preheated for cooking, if the humidity in the inner cavity is too high, condensation will be generated in the inner cavity, causing the food to have too much moisture and affecting the taste; if the humidity in the inner cavity is too high or too low, the food will be too dry and affect the taste. Due to the lack of a corresponding method for accurately controlling the humidity in the prior art, it is impossible to control the humidity in the inner cavity, and thus it is impossible to ensure that the user's taste is satisfied. In order to solve the above problems, the present invention proposes a control method for a steam oven to achieve accurate control of the humidity in the inner cavity and prevent the humidity in the inner cavity from being too high.

[0055] The preset humidity control result of the current humidity control interval is compared with the implementation result to generate the control logic for the next humidity control interval as follows: if the implementation result is within ±5%-10% of the preset humidity control result, it will operate according to the current parameter settings; if the implementation result is greater than 105%-110% of the preset humidity control result, the evaporator heating time and heating interval time of the steam oven will be maintained, and the fan speed of the steam oven will be increased by 10%-20%; if the implementation result is less than 90%-95% of the preset humidity control result, the evaporator heating time and heating interval time of the steam oven will be maintained, and the fan speed of the steam oven will be reduced by 10%-20%.

[0056] In this embodiment, if the implementation result is within ±5% of the preset humidity control result, it will operate according to the current parameter settings; if the implementation result is greater than 105% of the preset humidity control result, the evaporator heating time and heating interval time of the steam oven are maintained, and the fan speed of the steam oven is increased by 10%; if the implementation result is less than 95% of the preset humidity control result, the evaporator heating time and heating interval time of the steam oven are maintained, and the fan speed of the steam oven is reduced by 10%.

[0057] If the implementation result is greater than 105% of the preset humidity control result, and the current humidity control interval is "heating time is 40S, stop time is 35S, and crossflow fan speed is 1500r / min", the next humidity control interval is adjusted to "heating time is 40S, stop time is 35S, and crossflow fan speed is 1650r / min". The fan assembly is controlled to increase the speed to enhance the exhaust capacity of the inner cavity, thereby reducing the humidity of the inner cavity under test.

[0058] If the implementation result is less than 95% of the preset humidity control result, and the current humidity control interval is "heating time is 40S, stop time is 35S, and crossflow fan speed is 1500r / min", the next humidity control interval is adjusted to "heating time is 40S, stop time is 35S, and crossflow fan speed is 1350r / min". The fan assembly is controlled to reduce the speed to reduce the exhaust capacity of the inner cavity, thereby increasing the detected inner cavity humidity.

[0059] If the fluctuation rate of two consecutive test results is less than 5%, that is, the implementation result is not greater than 105% of the preset humidity control result, and the implementation result is not less than 95% of the preset humidity control result, it means that the inner cavity of the steam oven is in a humidity balance state, and the current speed of the fan assembly can be kept unchanged to maintain this state, thereby effectively maintaining the humidity of the inner cavity.

[0060] The humidity in the inner cavity can also be adjusted by increasing or decreasing the heating time or the heating interval time.

[0061] The specific steps of detecting whether it is the last humidity control cycle are: if it is not the last humidity control interval, return to step S4, implement humidity control on the current humidity control interval, compare the preset humidity control result of the current humidity control interval with the implementation result, and generate the control logic of the next humidity control interval; if it is the last humidity control interval, all humidity control intervals are executed and ended S7.

[0062] The above-mentioned preferred implementation modes should be regarded as illustrative examples of the implementation modes of the present application scheme. Any technical deductions, replacements, improvements, etc. that are identical or similar to the present application scheme or made based on this scheme should be regarded as within the scope of protection of this patent.

Claims

1. A steam oven with a humidity detection device, comprising a box shell (1), an inner cavity (2), an exhaust device (3) and an exhaust pipe assembly (4), wherein the inner cavity (2) is arranged in the box shell (1), the exhaust device (3) is arranged on the inner cavity (2), and the air inlet end of the exhaust device (3) is connected to the inner cavity (2) through the exhaust pipe assembly (4), characterized in that: The exhaust device (3) comprises a fan assembly (31) and an exhaust hood (32); one end of the exhaust hood (32) is connected to the fan assembly (31), and the other end is connected to the box shell (1); The exhaust pipe assembly (4) is arranged between the inner cavity (2) and the box shell (1), and the exhaust pipe assembly (4) comprises a main exhaust pipe (41), a first exhaust branch pipe (42) and a second exhaust branch pipe (43); the air inlet end of the main exhaust pipe (41) is connected to the inner cavity (2), the air outlet end of the main exhaust pipe (41) is connected to the air inlet end of the first exhaust branch pipe (42) and the air inlet end of the second exhaust branch pipe (43), respectively; the air outlet end of the first exhaust branch pipe (42) and the air outlet end of the second exhaust branch pipe (43) are connected to the exhaust hood (32), and the inner diameter cross-sectional area of ​​the second exhaust branch pipe (43) is larger than the inner diameter cross-sectional area of ​​the first exhaust branch pipe (42); A steam dilution detection area (44) is provided on the first exhaust branch pipe (42), and a humidity detection device (45) is provided in the steam dilution detection area (44).

2. The steam oven with a humidity detection device according to claim 1, characterized in that: The inner diameter cross-sectional area of ​​the main exhaust pipe (41) is smaller than the sum of the inner diameter cross-sectional areas of the first exhaust branch pipe (42) and the second exhaust branch pipe (43).

3. The steam oven with a humidity detection device according to claim 2, characterized in that: The inner diameter of the main exhaust pipe (41) is greater than or equal to 12 mm, the inner diameter of the first exhaust branch pipe (42) is greater than or equal to 6 mm, and the inner diameter of the second exhaust branch pipe (43) is greater than or equal to 11 mm.

4. A steam oven with a humidity detection device according to claim 1, 2 or 3, characterized in that: The maximum inner diameter of the steam dilution detection zone (44) is 1.5 times or more of the inner diameter of the first exhaust branch pipe (42).

5. A steam oven with a humidity detection device according to claim 1, 2 or 3, characterized in that: The humidity detection device (45) is arranged perpendicular to the steam flow direction in the steam dilution detection area (44).

6. A steam oven with a humidity detection device according to claim 1, 2 or 3, characterized in that: The humidity detection device (45) is arranged at the location where the inner diameter of the steam dilution detection area (44) is the largest, and is arranged at a position close to the rear end of the first exhaust branch pipe (42).

7. A method for controlling a steam oven, characterized in that: A steam oven with a humidity detection device as described in any one of claims 1 to 6, comprising: The steam oven enters preheat cooking mode; Divide the entire cycle of humidity control in the steam oven cavity into several humidity control intervals; Control the humidity in each humidity control interval; Implement humidity control on the current humidity control interval, compare the preset humidity control result of the current humidity control interval with the implementation result, and generate the control logic for the next humidity control interval; Execute the corresponding control logic for the next humidity control interval; Determine whether it is the last humidity control interval; If it is the last humidity control interval, then all humidity control intervals are completed.

8. The control method of a steam oven according to claim 7, characterized in that: Implement humidity control on the current humidity control interval, compare the preset humidity control result of the current humidity control interval with the implementation result, and generate the control logic of the next humidity control interval as follows: If the implementation result is within ±5%-10% of the preset humidity control result, it will run according to the current parameter settings; If the implementation result is greater than 105%-110% of the preset humidity control result, the evaporator heating time and heating interval time of the steam oven are maintained, and the fan speed of the steam oven is increased by 10%-20%; If the implementation result is less than 90%-95% of the preset humidity control result, the evaporator heating time and heating interval time of the steam oven are maintained, and the fan speed of the steam oven is reduced by 10%-20%.

9. The control method of a steam oven according to claim 7, characterized in that: The specific steps for detecting whether it is the last humidity control cycle are: If it is not the last humidity control interval, humidity control is implemented for the current humidity control interval, and the preset humidity control result of the current humidity control interval is compared with the implementation result to generate the control logic for the next humidity control interval; If it is the last humidity control interval, then all humidity control intervals are completed.

10. The control method of a steam oven according to claim 7, wherein the plurality of humidity control intervals are humidity control intervals of equal duration.

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