CN112043153B - Steam generation mechanism, steam cooking device and humidity control method - Google Patents
Steam generation mechanism, steam cooking device and humidity control method Download PDFInfo
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- CN112043153B CN112043153B CN202010799448.XA CN202010799448A CN112043153B CN 112043153 B CN112043153 B CN 112043153B CN 202010799448 A CN202010799448 A CN 202010799448A CN 112043153 B CN112043153 B CN 112043153B
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- 238000010411 cooking Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000007246 mechanism Effects 0.000 title claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 120
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 111
- 239000007788 liquid Substances 0.000 claims abstract description 74
- 230000008020 evaporation Effects 0.000 claims abstract description 72
- 238000001704 evaporation Methods 0.000 claims abstract description 72
- 239000011148 porous material Substances 0.000 claims abstract description 28
- 239000001301 oxygen Substances 0.000 claims description 138
- 229910052760 oxygen Inorganic materials 0.000 claims description 138
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 137
- 230000009467 reduction Effects 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 3
- 230000009471 action Effects 0.000 abstract description 7
- 230000005484 gravity Effects 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 229920006395 saturated elastomer Polymers 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/04—Cooking-vessels for cooking food in steam; Devices for extracting fruit juice by means of steam ; Vacuum cooking vessels
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/32—Time-controlled igniting mechanisms or alarm devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/04—Cooking-vessels for cooking food in steam; Devices for extracting fruit juice by means of steam ; Vacuum cooking vessels
- A47J2027/043—Cooking-vessels for cooking food in steam; Devices for extracting fruit juice by means of steam ; Vacuum cooking vessels for cooking food in steam
Abstract
The invention discloses a steam generating mechanism, a steam cooking device and a humidity control method, wherein the steam generating mechanism is used for the steam cooking device and comprises an evaporation cavity, a liquid level control cavity, a pore channel, a water inlet, a steam outlet, a heating assembly and a water storage assembly; the evaporation cavity and the liquid level control cavity are closed cavities and are horizontally connected, the pore is formed in the position where the evaporation cavity is connected with the liquid level control cavity and is used for enabling the evaporation cavity and the liquid level control cavity to be communicated, the water inlet is formed in the liquid level control cavity and is communicated with the water storage assembly through a pipeline, the height of the water inlet is higher than that of the pore, the heating assembly is arranged at the bottom of the evaporation cavity, and the steam outlet is communicated with the upper portion of the evaporation cavity. According to the invention, the evaporation cavity and the liquid level control cavity are connected through the pore channel, the water inlet is arranged on the liquid level control cavity, water automatically flows into the liquid level control cavity and the evaporation cavity under the action of gravity, the constant water level in the evaporation cavity can be ensured, and the problem that the evaporator cannot continuously and constantly output steam due to the arrangement of the water pump is effectively solved.
Description
Technical Field
The invention belongs to the technical field of steam cooking devices, and particularly relates to a steam generating mechanism, a steam cooking device and a humidity control method.
Background
The mouthfeel of food cooking is related to food materials and cooking environments, the cooking environments mainly comprise temperature, humidity and the like, and under the condition of keeping the temperature to be proper, the environmental humidity has great influence on the mouthfeel of the food cooking. For example, if the humidity is too high, the steamed food is wet and dirty due to too much moisture, and the steam-baked food is too wet and does not achieve the effect of crisp outside and tender inside; when the humidity is too low, the steamed food is difficult to be steamed, and the tender roasted food becomes too dry, etc., so that the optimal taste is obtained by proper cooking humidity.
Different food materials and different humidity required by different cooking modes are different, but the existing steam cooking device is provided with more optional humidity gears, and a user can select relatively proper gears by continuously trying the cooking environments with different gears, so that the cooking effect is poor.
Moreover, the existing steam generator is mostly connected with the water tank through the water pump, and water is intermittently added through the water pump, so that no steam is generated during water adding, and the steam generator can not continuously output steam.
Disclosure of Invention
In view of the above, the present invention provides a steam generating mechanism, in which an evaporation chamber and a liquid level control chamber are connected by a duct, and a water inlet communicated with a water storage assembly is disposed on the liquid level control chamber, so that water automatically flows into the liquid level control chamber and the evaporation chamber under the action of gravity, and the water level in the evaporation chamber is kept constant, thereby effectively solving the problem that an evaporator cannot continuously and constantly output steam due to the arrangement of a water pump.
Another object of the present invention is to provide a steam cooking apparatus having the above steam generating mechanism.
The third objective of the present invention is to provide a humidity control method for the above steam cooking device, wherein according to the theoretical corresponding relationship between the working power of the heating assembly and the oxygen concentration when the humidity of the inner container is balanced under the working power, the working power of the heating assembly is adjusted to the theoretical power corresponding to the oxygen concentration when the humidity of the inner container reaches the preset humidity, and the working power of the heating assembly is adjusted according to the comparison relationship between the real-time oxygen concentration and the oxygen concentration control threshold interval, so that the user can set the humidity by himself, and the problem of poor cooking effect caused by the fact that the user needs to try different gears to determine a proper cooking gear is effectively solved.
The technical scheme adopted by the invention is as follows:
a steam generating mechanism is used for a steam cooking device and comprises an evaporation cavity, a liquid level control cavity, a pore channel, a water inlet, a steam outlet, a heating assembly and a water storage assembly; the evaporation cavity with the liquid level control chamber is closed cavity, and both horizontal connections, the pore sets up in the junction department in evaporation cavity and liquid level control chamber for make both intercommunications, the water inlet sets up on the liquid level control chamber, and through the pipeline with the water storage component intercommunication, the height of water inlet is higher than the height in pore, heating element set up in evaporation cavity bottom, the steam outlet intercommunication sets up in evaporation cavity upper portion.
Preferably, the heating assembly is a thick film heater.
Preferably, the volume of the evaporation cavity is larger than that of the liquid level control cavity, and the pore passage is communicated with the evaporation cavity and the inner bottom of the liquid level control cavity.
Preferably, a water inlet pipeline communicated with the water inlet is arranged on the water storage assembly, and the water inlet pipeline is arranged at the bottom of the side wall of the water storage assembly.
The invention also discloses a steam cooking device which comprises the steam generating mechanism, a shell and a liner, wherein the liner is arranged in the shell, the evaporation cavity and the liquid level control cavity are arranged in the shell, and the steam outlet is communicated with the liner through a steam inlet pipe.
The invention also provides a humidity control method, which is applied to the steam cooking device and comprises the following steps:
s1, starting the steam cooking device, and inputting a preset temperature and a preset humidity;
s2, preheating the inner container of the steam cooking device to the preset temperature;
s3, starting the steam generating mechanism, adjusting the working power of the heating component to the maximum power, continuously humidifying the inner container, and adjusting the power of the heating component to the theoretical power corresponding to the preset humidity when the humidity of the inner container reaches the preset humidity;
the theoretical power is obtained according to the theoretical corresponding relation between the working power of the heating assembly and the oxygen concentration when the humidity of the inner container is balanced under the working power;
and S4, acquiring the real-time oxygen concentration of the inner container, and adjusting the working power of the heating assembly according to the comparison relation between the real-time oxygen concentration and the oxygen concentration control threshold interval.
Preferably, the oxygen concentration control threshold interval in S4 includes a first threshold interval and a second threshold interval, where the first threshold interval is the oxygen concentration a corresponding to the preset humidityPreset of+/-0.05-0.15 percent, wherein the second threshold interval is the oxygen concentration a corresponding to the preset humidityPreset of±(0.2～0.4)％。
Preferably, the first threshold interval is aPreset ofPlus or minus 0.1 percent and the second threshold interval is aPreset of±0.2％。
Preferably, in S4, the adjusting the operating power of the heating assembly according to the comparison relationship between the real-time oxygen concentration and the oxygen concentration control threshold interval specifically includes:
s4.1, judging whether the real-time oxygen concentration meets a formula (I);
apreset of-(0.05～0.15)％<Real time oxygen concentration<aPreset of+ (0.05-0.15)% of formula (I);
if yes, the heating component continues to work;
on the contrary, when the oxygen concentration is in real time>aPreset ofWhen the content is plus (0.05-0.15)%, entering S4.2;
as the real time oxygen concentration<aPreset of- (0.05-0.15)% of the total weight of the mixture, and entering S4.3;
s4.2, judging whether the real-time oxygen concentration meets a formula (II);
real time oxygen concentration>aPreset of+ (0.2-0.4)% of formula (II);
if yes, increasing the working power of the heating component;
otherwise, adjusting the working power of the heating component according to the increasing rate of the real-time oxygen concentration;
s4.3, judging whether the real-time oxygen concentration meets the formula (III);
real time oxygen concentration<aPreset of- (0.05-0.15)% of formula (III);
if yes, reducing the working power of the heating component;
and otherwise, adjusting the working power of the heating component according to the reduction rate of the real-time oxygen concentration.
Preferably, in S4.2, the operating power of the heating assembly is increased, specifically: increasing the working power of the heating assembly by 80-120W;
in S4.3, reducing the operating power of the heating assembly specifically includes: and reducing the working power of the heating assembly by 80-120W.
Preferably, in S4.2, the operating power of the heating assembly is adjusted according to the increase rate of the real-time oxygen concentration, specifically:
judging whether the increasing rate of the real-time oxygen concentration is less than 0.01%/s;
if so, increasing the working power of the heating assembly by 10-30W;
and otherwise, increasing the working power of the heating assembly by 40-60W.
Preferably, in S4.3, the operating power of the heating assembly is adjusted according to the reduction rate of the real-time oxygen concentration, specifically:
judging whether the reduction rate of the real-time oxygen concentration is less than 0.01%/s;
if so, reducing the working power of the heating assembly by 10-30W;
and otherwise, reducing the working power of the heating assembly by 40-60W.
Preferably, said S4.2 and said S4.3 further comprise: and after the working power of the heating assembly is adjusted, collecting the real-time oxygen concentration after 5-30S, and entering S4.1.
Preferably, the theoretical power in S3 is obtained according to a theoretical correspondence between the working power of the heating element and the oxygen concentration when the humidity of the liner is balanced, and specifically includes:
and when the inner container is in a cavity state, adjusting the heating assembly to different working powers, and recording an oxygen concentration value when the inner container reaches humidity balance under the corresponding working power, so as to obtain the theoretical corresponding relation between the working power of the heating assembly and the oxygen concentration when the inner container is in humidity balance.
The invention has the beneficial effects that: according to the invention, the evaporation cavity is connected with the liquid level control cavity through the pore channel, the liquid level control cavity is provided with the water inlet communicated with the water storage assembly, water automatically flows into the liquid level control cavity and the evaporation cavity under the action of gravity, the water level of the evaporation cavity automatically stops water inlet when passing through the pore channel, the water inlet automatically starts when being lower than the pore channel, the water level of the evaporation cavity is always kept constant under the condition of not needing a water pump, so that the steam generating mechanism can continuously generate steam with the same quantity, and the problem that the evaporator cannot continuously and constantly output steam due to the arrangement of the water pump is effectively solved;
meanwhile, according to the theoretical corresponding relation between the working power of the heating assembly and the oxygen concentration when the humidity of the inner container is balanced under the working power, the working power of the heating assembly is adjusted to the theoretical power corresponding to the oxygen concentration when the humidity of the inner container reaches the preset humidity, and the working power of the heating assembly is adjusted according to the comparison relation between the real-time oxygen concentration and the oxygen concentration control threshold value interval, so that a user can set the humidity by himself, and the problem of poor cooking effect caused by the fact that the user needs to try different gears to determine a proper cooking gear is effectively solved.
Drawings
Fig. 1 is a structural diagram of an evaporation chamber and a liquid level control chamber in a steam generating mechanism according to embodiment 1 of the present invention after assembly;
fig. 2 is a structural view of a steam generating mechanism provided in embodiment 1 of the present invention;
fig. 3 is a structural view of a steam cooking apparatus according to embodiment 2 of the present invention;
fig. 4 is a flowchart of a humidity control method according to embodiment 3 of the present invention;
fig. 5 is a specific flowchart of a humidity control method according to embodiment 3 of the present invention.
In the figure: 1. an evaporation chamber; 2. a liquid level control chamber; 3. a duct; 4. a water inlet; 5. a steam outlet; 6. a heating assembly; 7. a water storage assembly; 71. a water inlet pipe 8 and a shell; 9. an inner container.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The present embodiment provides a steam generating mechanism for a steam cooking device, as shown in fig. 1 and fig. 2, comprising an evaporation chamber 1, a liquid level control chamber 2, a pore 3, a water inlet 4, a steam outlet 5, a heating assembly 6 and a water storage assembly 7; the evaporation cavity 1 with the liquid level control chamber 2 is closed cavity, and both horizontal connections, pore 3 sets up in the junction department of evaporation cavity 1 and liquid level control chamber 2 for make both intercommunications, water inlet 4 sets up on liquid level control chamber 2, and through the pipeline with water storage component 7 communicates, water inlet 4 highly be higher than pore 3's height. The heating assembly 6 is arranged at the bottom of the evaporation cavity 1, and the steam outlet 5 is communicated with the upper part of the evaporation cavity 1.
Thus, the evaporation cavity 1 and the liquid level control cavity 2 are horizontally connected, are both closed cavities and are communicated through the pore canal 3, the water inlet 4 of the liquid level control cavity 2 is communicated with the water storage component 7 through a pipeline, and the height of the water inlet 4 is higher than that of the pore canal 3; based on U type pipe principle, the liquid level on evaporation chamber 1 and 2 both sides of liquid level control chamber is the same height, when the liquid level is less than the height in pore 3, water is under the action of gravity, flow into liquid level control chamber 2 through the pipeline in the water storage component 7, then flow into in the evaporation chamber 1, when the liquid level does not have pore 3, form airtight space between the interior top in liquid level control chamber 2 interior liquid level and liquid level control chamber 2, water in the water storage component 7 no longer flows into in liquid level control chamber 2 because the effect of atmospheric pressure, also stop adding water by oneself promptly, until water in the evaporation chamber 1 when the liquid level is less than pore 3 because the evaporation leads to the liquid level, the air intercommunication between evaporation chamber 1 and the liquid level control chamber 2, water storage component 7's water flows into in liquid level control chamber 2 once more.
The steam generating mechanism of the embodiment can keep the liquid level of the evaporation cavity 1 constant, realize automatic water adding and automatic water stopping when water is needed or not needed, and does not need manual control; the constant liquid level can ensure that the evaporation cavity 1 continuously generates equivalent steam, a constant-humidity cooking environment which continuously generates steam is created, and the humidity control is facilitated; in addition, in the process of continuously adding water, new steam can be continuously used to replace old steam, and the cooking taste of food materials is favorably improved.
In specific implementation, the evaporation cavity 1 and the liquid level control cavity 2 can be arranged integrally or separately.
In specific implementation, the heating component 6 is a thick film heater, the thick film heater belongs to surface heating, the heating rate is high, and steam can be rapidly generated according to needs; and the heating power, that is, the adjustment of the working power (generally 0-2000W) can be carried out through the controllable silicon, so that the evaporation cavity 1 can generate different steam amounts.
In order to enable the evaporation chamber 1 to generate more steam, the volume of the evaporation chamber 1 is larger than the volume of the liquid level control chamber 2.
In order to avoid water storage at the bottom in the evaporation cavity 1, the water storage still exists after multiple times of self-watering, and the pore channel 3 is communicated with the evaporation cavity 1 and the inner bottom of the liquid level control cavity 2;
like this, can make and be new water in the evaporation chamber 1 and trade old water all the time, also make the steam that evaporation chamber 1 produced be new steam and replace old steam all the time exactly, be favorable to improving the taste of eating the material to and avoid depositing the bacterial growing problem that leads to for a long time.
In order to enable water at the middle lower part and the bottom of the water storage assembly 7 to automatically enter the liquid level control chamber 2, a water inlet pipeline 71 communicated with the water inlet 4 is arranged on the water storage assembly 7, and the water inlet pipeline 71 is arranged at the bottom of the side wall of the water storage assembly 7.
The working principle is as follows: when the steam generating mechanism of the embodiment is used, based on the principle of a U-shaped pipe, the liquid levels on the two sides of the evaporation cavity 1 and the liquid level control cavity 2 are equal in height, when the liquid level is lower than the height of the pore 3, water flows into the liquid level control cavity 2 from the water storage component 7 through the water inlet pipeline 71 under the action of gravity and then flows into the evaporation cavity 1, when the liquid level is not through the pore 3, a closed space is formed between the liquid level in the liquid level control cavity 2 and the inner top of the liquid level control cavity 2, and water in the water storage component 7 does not flow into the liquid level control cavity 2 under the action of air pressure, namely, the water adding is automatically stopped; in the process, the heating component 6 heats the water in the evaporation cavity 1, so that the water is evaporated to generate steam, until the liquid level of the water in the evaporation cavity 1 is lower than the pore canal 3 due to evaporation, the air between the evaporation cavity 1 and the liquid level control cavity 2 is communicated, and the water in the water storage component 7 flows into the liquid level control cavity 2 again;
the heating assembly 6 evaporates the water in the evaporation cavity 1 to obtain steam, and the steam escapes through the steam outlet 5.
In the embodiment, the evaporation cavity is connected with the liquid level control cavity through the pore channel, the liquid level control cavity is provided with the water inlet communicated with the water storage assembly, water automatically flows into the liquid level control cavity and the evaporation cavity under the action of gravity, and the water is automatically stopped to be added when the liquid level in the liquid level control cavity reaches the height of the pore channel, so that the constancy of the water level in the evaporation cavity can be ensured, and the problem that the evaporator cannot continuously and constantly output steam due to the arrangement of the water pump is effectively solved;
moreover, the steam generating mechanism of the embodiment can continuously replace old steam with new steam, and is beneficial to improving the taste of food materials.
Example 2
The embodiment provides a steam cooking device, as shown in fig. 3, the steam cooking device includes a steam generating mechanism of embodiment 1, a housing 8 and a liner 9, the liner 9 is disposed in the housing 8, the evaporation chamber 1 and the liquid level control chamber 2 are disposed in the housing 8, and the steam outlet 5 is communicated with the liner 9 through a steam inlet pipe.
Thus, the steam generated by the evaporation cavity 1 in the steam generating mechanism enters the inner container 9 through the steam inlet pipe, and the food in the inner container 9 is cooked.
In specific implementation, the evaporation cavity 1 and the liquid level control cavity 2 can be arranged above the inner container 9;
meanwhile, in order to better fix the evaporation cavity 1, a fixing frame is further arranged on the evaporation cavity 1.
In specific implementation, the steam cooking device further comprises an exhaust hood, an oxygen concentration detection assembly and the like.
In specific implementation, the steam cooking device can be a steam box, a micro-steam box, a steam oven, a micro-steaming and baking integrated machine and the like.
This embodiment can be for the inner bag to continuously input invariable steam through setting up steam generation mechanism at steam cooking device, makes the inner bag keep the culinary art environment of constant humidity, and at the input steam in-process, continuously uses new steam to replace old steam, is favorable to improving the taste of culinary art edible material.
Example 3
The present embodiment provides a humidity control method applied to the steam cooking apparatus of embodiment 2, as shown in fig. 4, including the steps of:
s1, starting the steam cooking device, and inputting a preset temperature and a preset humidity;
s2, preheating the inner container of the steam cooking device to the preset temperature;
s3, starting the steam generating mechanism, adjusting the working power of the heating component to the maximum power, continuously humidifying the inner container, and adjusting the power of the heating component to the theoretical power corresponding to the preset humidity when the humidity of the inner container reaches the preset humidity, namely the oxygen concentration of the inner container reaches the oxygen concentration corresponding to the preset humidity;
the theoretical power is obtained according to the theoretical corresponding relation between the working power of the heating assembly and the oxygen concentration when the humidity of the inner container is balanced under the working power;
and S4, acquiring the real-time oxygen concentration of the inner container, and adjusting the working power of the heating assembly according to the comparison relation between the real-time oxygen concentration and the oxygen concentration control threshold interval.
Like this, preheat the completion back, adjust heating element's operating power to the maximum operating power and heat the evaporation to the water in the evaporation chamber, and transmit steam and give the inner bag, humidity when the inner bag reaches preset humidity, that is to say when the oxygen concentration of inner bag reaches the oxygen concentration that preset humidity corresponds, the operating power of adjusting heating element is the theoretical power that corresponds under this oxygen concentration, the operating power of adjusting heating element through the comparison according to real-time oxygen concentration and oxygen concentration control threshold interval this moment, also be exactly adjust heating element's operating power, thereby keep the invariant of inner bag humidity.
The reasons for adjusting the operating power of the heating assembly are: different food materials have different capacities of absorbing or releasing water vapor at different time and temperature; the steam generating mechanism has the advantages that after the steam generating mechanism is used for a long time, scales exist in the inner container, the heat conductivity can be changed, and the like, the heating power corresponding to the set relative humidity can be changed due to the factors, and therefore the heating power of the heating component in the steam generating mechanism needs to be adjusted in a micro-scale mode in the constant humidity process. During the constant humidity process, the control chip records the measured oxygen concentration of the oxygen sensor.
In specific implementation, the theoretical power in S3 is obtained according to a theoretical correspondence between the working power of the heating element and the oxygen concentration when the humidity of the liner is balanced, and specifically includes:
and when the inner container is in a cavity state, adjusting the heating assembly to different working powers, and recording an oxygen concentration value when the inner container reaches humidity balance under the corresponding working power, so as to obtain the theoretical corresponding relation between the working power of the heating assembly and the oxygen concentration when the inner container is in humidity balance.
That is, through the experimental mode, when confirming that the steam cooking device inner bag is the cavity, heating element among the steam generating mechanism is under different operating power, the corresponding oxygen concentration when inner bag humidity is balanced.
Because the difference of the humidity inside and outside the inner container of the steam cooking device is larger, the reduction speed of the humidity of the inner container is higher, so that different steam generation speeds correspond to different equilibrium humidities, and different working voltages can be matched with the corresponding relative humidities of different temperatures through calculation of a conversion formula of oxygen concentration and humidity.
Here, a process of detecting humidity by oxygen concentration, that is, a conversion process of oxygen concentration and humidity will be described:
as the steam cooking device is in communication with the atmosphere, it defaults to atmospheric pressure; the integral of oxygen gas in the atmosphere is 21%, and nitrogen gas and other gases account for 79%, so that after water vapor is introduced, assuming that the oxygen concentration (i.e., volume fraction) is a, the volume fraction e of the gas other than oxygen (nitrogen gas and other gases) is a/21% 79a/21, based on the volume ratio of nitrogen gas, other gases and oxygen gas in the air;
when the humidity is increased, the water vapor is increased, the volume fractions of oxygen and gases except the oxygen are reduced, and the volume fraction d of the water vapor is 1-a-e and 1-100 a/21;
according to an ideal gas state equation: PV is equal to nRT,
both sides are multiplied by the density ρ, divided by the amount of substance n, to give the equation: PM ═ ρ RT
Therefore, the water vapor density ρ is PM/RT
Wherein, P is the absolute pressure of the inner container of the steaming oven, namely the atmospheric pressure; v is the volume; n is the amount of substance; r is a common gas constant 8.314J/(mol.K); t is the temperature in Kelvin; m is relative molecular mass, and the water vapor is 18 g/mol;
according to the related knowledge, the absolute humidity is the density of water vapor in the air, namely
Absolute humidity b ═ ρ · d
At this time, the relative humidity c is b/saturated absolute humidity, which is the maximum absolute humidity that can be reached at a certain temperature; or c is d P/saturated vapor pressure, P is atmospheric pressure, and the saturated vapor pressure is related to temperature (which can be searched by the existing saturated vapor pressure table of water at different temperatures).
Therefore, the humidity of the inner container can be obtained by detecting the real-time oxygen concentration of the inner container.
In a specific implementation, the oxygen concentration of the inner container can be detected by an oxygen concentration detection component, such as an oxygen sensor.
In a specific implementation, the oxygen concentration control threshold interval in S4 includes a first threshold interval and a second threshold interval, where the first threshold interval is the oxygen concentration a corresponding to the preset humidityPreset of+/-0.05-0.15 percent, wherein the second threshold interval is the oxygen concentration a corresponding to the preset humidityPreset of±(0.2～0.4)％。
Preferably, the first threshold interval is aPreset of0.1%, the secondThreshold interval of aPreset of±0.2％。
In order to avoid the influence on humidity control caused by different water absorbing or releasing capacities of different food materials during cooking and scales generated by the steam generating assembly after being used for a long time, in S4, the working power of the heating assembly is adjusted according to the comparison relationship between the real-time oxygen concentration and the oxygen concentration control threshold interval, specifically:
s4.1, judging whether the real-time oxygen concentration meets a formula (I);
apreset of-(0.05～0.15)％<Real time oxygen concentration<aPreset of+ (0.05-0.15)% of formula (I);
if yes, the heating component continues to work;
on the contrary, when the oxygen concentration is in real time>aPreset ofWhen the content is plus (0.05-0.15)%, entering S4.2;
as the real time oxygen concentration<aPreset of- (0.05-0.15)% of the total weight of the mixture, and entering S4.3;
s4.2, judging whether the real-time oxygen concentration meets a formula (II);
real time oxygen concentration>aPreset of+ (0.2-0.4)% of formula (II);
if yes, increasing the working power of the heating component;
otherwise, adjusting the working power of the heating component according to the increasing rate of the real-time oxygen concentration;
s4.3, judging whether the real-time oxygen concentration meets the formula (III);
real time oxygen concentration<aPreset of- (0.05-0.15)% of formula (III);
if yes, reducing the working power of the heating component;
and otherwise, adjusting the working power of the heating component according to the reduction rate of the real-time oxygen concentration.
Wherein, increasing the working power of the heating assembly in S4.2 specifically is: increasing the working power of the heating assembly by 80-120W, preferably 100W;
in S4.3, reducing the operating power of the heating assembly specifically includes: and reducing the working power of the heating assembly by 80-120W, preferably 100W.
In order to cook different food materials with different capabilities of absorbing or releasing water vapor during cooking, the operating power of the heating assembly is adjusted according to the increasing rate of the real-time oxygen concentration in S4.2, specifically:
judging whether the increasing rate of the real-time oxygen concentration is less than 0.01%/s;
if so, increasing the working power of the heating assembly by 10-30W, preferably 20W;
and conversely, increasing the working power of the heating assembly by 40-60W, preferably 50W.
And in the S4.3, adjusting the working power of the heating assembly according to the reduction rate of the real-time oxygen concentration, specifically:
judging whether the reduction rate of the real-time oxygen concentration is less than 0.01%/s;
if so, reducing the working power of the heating assembly by 10-30W, preferably 20W;
and conversely, the working power of the heating assembly is reduced by 40-60W, preferably 50W.
In specific implementation, the humidity control is a closed-loop control, that is, the humidity control is not performed after the operating power of the heating assembly is adjusted, but the real-time oxygen concentration of the liner is collected after the adjustment, and the judgment is performed again based on the real-time oxygen concentration, and the S4.2 and the S4.3 further include: and after the working power of the heating assembly is adjusted, collecting the real-time oxygen concentration after 5-30S, preferably 10S, and entering S4.1.
Fig. 5 is a specific process of the humidity control method according to the embodiment, and as shown in fig. 5, the humidity control method according to the embodiment includes the following steps:
s1, starting the steam cooking device, and inputting a preset temperature and a preset humidity;
s2, preheating the inner container of the steam cooking device to the preset temperature;
s3, starting the steam generating mechanism, adjusting the working power of the heating component to the maximum power, and aligning the inner containerContinuously humidifying, and when the humidity of the inner container reaches the preset humidity, the real-time oxygen concentration of the inner container reaches the oxygen concentration a corresponding to the preset humidityPreset ofAdjusting the power of the heating assembly to the theoretical power corresponding to the preset humidity;
s4, collecting the real-time oxygen concentration of the liner, and adjusting the working power of the heating assembly according to the comparison relation between the real-time oxygen concentration and the oxygen concentration control threshold interval;
the method specifically comprises the following steps:
s4.1, judging whether the real-time oxygen concentration meets a formula (I);
apreset of-0.1％<Real time oxygen concentration<aPreset of+ 0.1% of formula (I);
if yes, the heating component continues to work;
on the contrary, when the oxygen concentration is in real time>aPreset ofWhen + 0.1%, enter S4.2;
as the real time oxygen concentration<aPreset of0.1%, go to S4.3;
s4.2, judging whether the real-time oxygen concentration meets a formula (II);
real time oxygen concentration>aPreset of+ 0.2% of formula (II);
if yes, increasing the working power of the heating assembly, namely increasing the working power of the heating assembly by 100W; collecting the real-time oxygen concentration after 10S and entering S4.1;
otherwise, judging whether the increasing rate of the real-time oxygen concentration is less than 0.01%/s;
if yes, increasing the working power of the heating assembly by 20W, collecting the real-time oxygen concentration after 10S, and entering S4.1;
and otherwise, increasing the working power of the heating assembly by 50W, collecting the real-time oxygen concentration after 10S, and entering S4.1.
S4.3, judging whether the real-time oxygen concentration meets the formula (III);
real time oxygen concentration<aPreset of-0.2% of formula (III);
if yes, reducing the working power of the heating assembly, namely reducing the working power of the heating assembly by 100W; collecting the real-time oxygen concentration after 10S and entering S4.1;
otherwise, judging whether the reduction rate of the real-time oxygen concentration is less than 0.01%/s;
if yes, reducing the working power of the heating assembly by 20W, collecting the real-time oxygen concentration after 10S, and entering S4.1;
and otherwise, reducing the working power of the heating assembly by 50W, collecting the real-time oxygen concentration after 10S, and entering S4.1.
This embodiment is through the theoretical corresponding relation of the oxygen concentration when working power according to heating element and this working power lower liner humidity balance, adjust the theoretical power that the oxygen concentration corresponds when this hour with heating element's working power when inner liner humidity reaches preset humidity, and adjust heating element's working power according to the comparative relation between real-time oxygen concentration and oxygen concentration control threshold interval, the user can set up humidity by oneself, effectively solved the user and needed to try different gears and confirm the not good problem of culinary art effect that more suitable culinary art gear leads to.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (11)
1. A humidity control method is applied to a steam cooking device and is characterized by comprising the following steps:
s1, starting the steam cooking device, and inputting a preset temperature and a preset humidity;
s2, preheating the inner container of the steam cooking device to the preset temperature;
s3, starting the steam generating mechanism, adjusting the working power of the heating component to the maximum power, continuously humidifying the inner container, and adjusting the power of the heating component to the theoretical power corresponding to the preset humidity when the humidity of the inner container reaches the preset humidity;
the theoretical power is obtained according to the theoretical corresponding relation between the working power of the heating assembly and the oxygen concentration when the humidity of the inner container is balanced under the working power;
s4, collecting the real-time oxygen concentration of the liner, and adjusting the working power of the heating assembly according to the comparison relation between the real-time oxygen concentration and the oxygen concentration control threshold interval;
in S4, adjusting the operating power of the heating element according to the comparison between the real-time oxygen concentration and the oxygen concentration control threshold interval, specifically:
s4.1, judging whether the real-time oxygen concentration meets a formula (I);
apreset of-(0.05～0.15)％<Real time oxygen concentration<aPreset of+ (0.05-0.15)% of formula (I);
if yes, the heating component continues to work;
on the contrary, when the oxygen concentration is in real time>aPreset ofWhen the content is plus (0.05-0.15)%, entering S4.2;
as the real time oxygen concentration<aPreset of- (0.05-0.15)% of the total weight of the mixture, and entering S4.3;
s4.2, judging whether the real-time oxygen concentration meets a formula (II);
real time oxygen concentration>aPreset of+ (0.2-0.4)% of formula (II);
if yes, increasing the working power of the heating component;
otherwise, adjusting the working power of the heating component according to the increasing rate of the real-time oxygen concentration;
s4.3, judging whether the real-time oxygen concentration meets the formula (III);
real time oxygen concentration<aPreset of- (0.05-0.15)% of formula (III);
if yes, reducing the working power of the heating component;
otherwise, adjusting the working power of the heating component according to the reduction rate of the real-time oxygen concentration;
the steam cooking device comprises a steam generating mechanism, a shell (8) and a liner (9), wherein the liner (9) is arranged in the shell (8), an evaporation cavity (1) and a liquid level control cavity (2) are arranged in the shell (8), and a steam outlet (5) is communicated with the liner (9) through a steam inlet pipe;
the steam generating mechanism comprises an evaporation cavity (1), a liquid level control cavity (2), a pore channel (3), a water inlet (4), a steam outlet (5), a heating assembly (6) and a water storage assembly (7); evaporation chamber (1) with liquid level control chamber (2) are closed cavity, and both horizontally connect, pore (3) set up in the junction department of evaporation chamber (1) and liquid level control chamber (2) for make both intercommunications, water inlet (4) set up on liquid level control chamber (2), and through the pipeline with water storage component (7) intercommunication, the height of water inlet (4) is higher than the height of pore (3), heating element (6) set up in evaporation chamber (1) bottom, steam outlet (5) intercommunication sets up in evaporation chamber (1) upper portion.
2. The humidity control method according to claim 1, wherein the oxygen concentration control threshold interval in S4 includes a first threshold interval and a second threshold interval, and the first threshold interval is an oxygen concentration a corresponding to the preset humidityPreset of+/-0.05-0.15 percent, wherein the second threshold interval is the oxygen concentration a corresponding to the preset humidityPreset of±(0.2～0.4)％。
3. A humidity control method according to claim 2, characterized in that said first threshold interval is aPreset ofPlus or minus 0.1 percent and the second threshold interval is aPreset of±0.2％。
4. A humidity control method according to claim 1, characterized in that in S4.2, the operating power of the heating element is increased, specifically: increasing the working power of the heating assembly by 80-120W;
in S4.3, reducing the operating power of the heating assembly specifically includes: and reducing the working power of the heating assembly by 80-120W.
5. A humidity control method according to claim 1, wherein in S4.2, the operating power of the heating element is adjusted according to the increasing rate of the real-time oxygen concentration, specifically:
judging whether the increasing rate of the real-time oxygen concentration is less than 0.01%/s;
if so, increasing the working power of the heating assembly by 10-30W;
and otherwise, increasing the working power of the heating assembly by 40-60W.
6. A humidity control method according to claim 1, wherein in S4.3, the operating power of the heating element is adjusted according to the real-time oxygen concentration reduction rate, specifically:
judging whether the reduction rate of the real-time oxygen concentration is less than 0.01%/s;
if so, reducing the working power of the heating assembly by 10-30W;
and otherwise, reducing the working power of the heating assembly by 40-60W.
7. A humidity control method according to any one of claims 4 to 6,
said S4.2 and said S4.3 further comprise: and after the working power of the heating assembly is adjusted, collecting the real-time oxygen concentration after 5-30S, and entering S4.1.
8. The humidity control method according to claim 1, wherein the theoretical power in S3 is obtained according to a theoretical correspondence between the operating power of the heating element and the oxygen concentration when the humidity of the liner is balanced, and specifically includes:
and when the inner container is in a cavity state, adjusting the heating assembly to different working powers, and recording an oxygen concentration value when the inner container reaches humidity balance under the corresponding working power, so as to obtain the theoretical corresponding relation between the working power of the heating assembly and the oxygen concentration when the inner container is in humidity balance.
9. A humidity control method according to claim 1, characterized in that the heating element (6) is a thick film heater.
10. A humidity control method according to claim 1, characterized in that the volume of said evaporation chamber (1) is greater than the volume of said liquid level control chamber (2), and said duct (3) communicates with the inner bottom of both said evaporation chamber (1) and said liquid level control chamber (2).
11. A humidity control method according to claim 1, wherein a water inlet pipe (71) connected to the water inlet (4) is disposed on the water storage assembly (7), and the water inlet pipe (71) is disposed at the bottom of the side wall of the water storage assembly (7).
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| CN115944204A (en) * | 2021-10-09 | 2023-04-11 | 广东美的厨房电器制造有限公司 | Cooking utensil |
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