CN111897386A - Method for defining fire power and duration - Google Patents
Method for defining fire power and duration Download PDFInfo
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- CN111897386A CN111897386A CN202010690428.9A CN202010690428A CN111897386A CN 111897386 A CN111897386 A CN 111897386A CN 202010690428 A CN202010690428 A CN 202010690428A CN 111897386 A CN111897386 A CN 111897386A
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- fire
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/30—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature
- G05D23/32—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature with provision for adjustment of the effect of the auxiliary heating device, e.g. a function of time
Abstract
The invention discloses a method for defining firepower duration, which comprises the following steps of; step (1), defining the meaning of firepower, defining the firepower unit as 'element' and using character 'Y' to represent; step (2), according to an endothermic formula: q = cm Δ t, available: 1Y = cm, wherein: c: as the specific heat capacity of the heat absorbing object, m: is the mass of the heat absorbing object; step (3), obtaining a formula for calculating firepower; and (4) determining the definition of the relationship between the element and common micro-fire, slow fire, medium fire, strong fire and violent fire: and (5) defining a calculation expression of the duration of heat as follows: hp = Y × t; wherein: hp: duration, Y: firepower, t: and (4) heating time. The invention uses the terms of firepower duration and the digital expression to more accurately control the heating and processing technologies of frying, boiling, steaming and the like, more clearly defines the quantitative indexes of firepower and duration in the processing process of the material, is convenient for the application of intelligent control field of fire in the future, and has better unified standard.
Description
Technical Field
The invention relates to the technical field of fire degree definition, in particular to a fire degree definition method.
Background
In the application of fire such as traditional Chinese medicine processing and food processing, the terms of micro fire, slow fire, medium fire, strong fire (strong fire), strong fire and the like are used as descriptions of fire intensity in thousands of years of history, but the descriptions are concluded based on human sensory judgment, and the fire intensity reflected by different processed materials (hereinafter, referring to fire application, mainly heated materials including but not limited to food materials or medicinal materials) or different quality processed materials is deviated even if the heating source with the same gear is used. Under the historical background that the existing intelligent control technology is more mature, an intelligent control technology in application of pushing fire by using quantifiable firepower and fire degree standards is urgently needed.
Disclosure of Invention
The present invention aims to provide a method for defining fire power and duration to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a definition method of firepower and duration comprises the following steps;
step (1), defining: 1 yuan of firepower represents a certain mass of heated materials, and in the process of absorbing heat and raising temperature without changing the state, the 1 yuan of firepower can raise the temperature by 1 ℃ in the heating process for 1 minute;
wherein, the firepower unit is defined as 'element' and is represented by the character 'Y';
step (2), according to an endothermic formula: q = cm Δ t, available: 1Y = cm, wherein: c: as the specific heat capacity of the heat absorbing object, m: is the mass of the heat absorbing object;
and (3) obtaining a formula for calculating firepower as follows:
wherein:
: is the specific heat capacity of the container,
: is the mass of the container;
and (4) determining the definition of the relationship between the element and common micro-fire, slow fire, medium fire, strong fire and violent fire:
wherein: and (3) micro fire: 0-4 yuan fire power;
slow fire: 4-8 yuan fire power;
middle fire: 8-16 yuan fire power;
and (3) strong fire: 16-32 yuan fire power;
violent fire: 32-64 yuan fire power;
and (5) defining a calculation expression of the duration of heat as follows: hp = Y × t;
wherein: hp: duration, Y: firepower, t: and (4) heating time.
Preferably, in the step (4), the 0-4 yuan fire is 1L of fire of water at 20 ℃ for about 20 minutes or more (standard atmospheric pressure).
Preferably, in the step (4), the 4-8 yuan fire power is 1L of fire power (standard atmospheric pressure) of water at 20 ℃ for about 10-20 minutes.
Preferably, in the step (4), the 8-16 yuan fire power is 1L of fire power (standard atmospheric pressure) of water at 20 ℃ for about 5-10 minutes.
Preferably, in the step (4), the 16-32 yuan fire power is 1L of fire power (standard atmospheric pressure) of water at 20 ℃ for about 3-5 minutes.
Preferably, in the step (4), the 32-64 yuan fire power is 1L of fire power (standard atmospheric pressure) of water at 20 ℃ for about 2-3 minutes.
The method for defining the fire degree provided by the invention has the beneficial effects that:
1. the invention replaces the traditional experience and sensory feeling fire degree by eyes, hands, ears, noses and the like by quantifying the fire degree term, avoids the instability caused by the change of factors such as people or environment and the like, and can more accurately control the heating and processing processes such as frying, decocting, boiling, steaming and the like by using the term and the digital expression of the fire degree;
2. the invention defines the quantitative indexes of firepower and duration of heat in the processing process of the material more clearly, is convenient for the application of intelligent control field of fire in the future and has better unified standard.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: a definition method of firepower and duration comprises the following steps;
step (1), defining: 1 yuan of firepower represents a certain mass of heated materials, and in the process of absorbing heat and raising temperature without changing the state, the 1 yuan of firepower can raise the temperature by 1 ℃ in the heating process for 1 minute;
wherein, the unit of firepower is defined as element and is represented by character Y;
step (2), according to an endothermic formula: q = cm Δ t, available: 1Y = cm, wherein: c: as the specific heat capacity of the heat absorbing object, m: is the mass of the heat absorbing object;
and (3) obtaining a formula for calculating firepower as follows:
wherein:
: is the specific heat capacity of the container,
: is the mass of the container;
and (4) determining the definition of the relationship between the element and common micro-fire, slow fire, medium fire, strong fire and violent fire:
wherein: and (3) micro fire: 0-4 yuan fire power; the 0-4 yuan fire power is the fire power (standard atmospheric pressure) for boiling 1L of water at 20 ℃ for more than 20 minutes;
slow fire: 4-8 yuan fire power; the 4-8 yuan fire power is 1L of water boiled in about 10-20 minutes at 20 ℃ (standard atmospheric pressure);
middle fire: 8-16 yuan fire power; the 8-16 yuan fire power is 1L of water boiled in about 5-10 minutes at 20 ℃ (standard atmospheric pressure);
and (3) strong fire: 16-32 yuan fire power; the 16-32 yuan fire power is 1L of water boiled in about 3-5 minutes at 20 ℃ (standard atmospheric pressure);
violent fire: 32-64 yuan fire power; the 32-64 yuan fire in the step (4) is 1L of fire of water at 20 ℃ in about 2-3 minutes (standard atmospheric pressure);
and (5) defining a calculation expression of the duration of heat as follows: hp = Y × t;
wherein: hp: duration, Y: firepower, t: and (4) heating time.
Examples of the conventional containers, generally stainless steel pots, iron pots, ceramic pots, aluminum pots, heat-resistant glass pots, etc., the specific heat capacities of these containers are respectively (refer to the related art, and are not studied here): a stainless steel pan: 0.46X 103J/(kg. DEG C), iron pan: 0.46X 103J/(kg. DEG C), ceramic pan: 0.85X 103J/(kg. degree. C.) (Normal temperature), 1.25X 103J/(kg. DEG C.) (900 ℃ C.), aluminum pan: 0.88X 103J/(kg. DEG C) (ambient temperature), high borosilicate heat-resistant glass: 0.82X 103J/(kg. DEG C) (100 ℃ or lower);
common processed materials, such as water, solid water-containing food materials and the like; water: 4.2X 103J/(kg. DEG C.) (liquid) saturated steam: normal pressure 100 deg.C about 2.1X 103J/(kg. DEG C.) (liquid);
to illustrate the definition of firepower:
example 1: cooking 0.4kg of pears in 1L of water in a glass container, wherein the weight of the glass container is about 0.5 kg;
wherein, the density of the pear is 0.993g/cm, the water content is 88.89%, the content of soluble solid is 10.17%, and the specific heat capacity is as follows: 3.28 KJ/(kg.k) at 10 ℃, 3.42 KJ/(kg.k) at 15 ℃ and 3.46 KJ/(kg.k) at 20 ℃, taking the approximate values: 3.5 KJ/(kg.K);
the corresponding 1Y fire values are: 0.82X 103×0.5+4.2×103×1.0+3.5×103×0.4=6.01×103(J)
The commonly used heating source, generally electric heating, fuel burning heating (other heating methods are omitted, the principle is consistent), neglect the influence of conversion efficiency:
if electric heating is used: from Q = Pt, it can be calculated: (P is electric heating power);
P=1Y/60≈100W；
the heating power corresponding to the 1Y fire power value is about 100W, so that the corresponding fire power value can be controlled quantitatively by controlling the heating power;
the corresponding general term ranges are:
and (3) micro fire: the heating power is below 400W;
slow fire: the heating power is 400W-800W;
middle fire: the heating power is 800W-1600W;
and (3) strong fire: the heating power is 1600W-3200W;
violent fire: the heating power is 3200W-6400W;
if the natural gas is used for combustion heating: the heat formula Q = Vq and the flow formula V =
t can be calculated as: q =
tq（
: actual volume flow, q: natural gas calorific value 7.5 x 107J/m3Combustion efficiency calculated as 100%);
the gas flow corresponding to the 1Y fire power value is about 0.08L/min, and the corresponding fire power value can be controlled quantitatively by controlling the gas flow;
the corresponding general term ranges:
and (3) micro fire: the gas flow is below 0.32L/min;
slow fire: the gas flow is 0.32L/min-0.64L/min;
middle fire: the gas flow is 0.64L/min-1.28L/min;
and (3) strong fire: the gas flow is 1.28L/min-2.56L/min;
violent fire: the gas flow is 2.56L/min-5.12L/min.
Example 2: frying 400g of beefsteak with an aluminum pan weighing 0.5 kg;
wherein the beefsteak: water content of 60%, protein of 25.0%, carbohydrate of 0.0%, fat of 13.0% and specific heat capacity of 3.056 KJ/(kg.k);
the corresponding 1Y fire values are: 0.88X 103×0.5+3.056×103×0.4=1.66×103(J)；
If electric heating is used: from Q = Pt, it can be calculated: (P is electric heating power);
P=1Y/60≈28W；
the heating power corresponding to the 1Y fire power value is about 27W, so that the corresponding fire power value can be controlled quantitatively by controlling the heating power;
the corresponding general term ranges are:
and (3) micro fire: the heating power is below 112W;
slow fire: the heating power is 112W-224W;
middle fire: the heating power is 224W-448W;
and (3) strong fire: the heating power is 448-896W;
violent fire: the heating power is 896W-1792W.
If the natural gas is used for combustion heating: the heat formula Q = Vq and the flow formula V =
t can be calculated as:
Q=
tq（
: actual volume flow, q: natural gas calorific value 7.5 x 107J/m3Combustion efficiency calculated as 100%);
the gas flow corresponding to the 1Y fire power value is about 0.022L/min, and the corresponding fire power value can be controlled quantitatively by controlling the gas flow;
the corresponding general term ranges are:
and (3) micro fire: the gas flow is below 0.088L/min;
slow fire: the gas flow is 0.088-0.176L/min;
middle fire: the gas flow is 0.176L/min-0.352L/min;
and (3) strong fire: the gas flow is 0.352L/min-0.704L/min;
violent fire: the gas flow is 0.704L/min-1.408L/min.
Example 3: achieving a certain duration state by controlling the duration of a certain fire is a common way of controlling the duration, for example: boiling with strong fire, and then decocting with slow fire for 30 minutes, wherein 2 fire states are expressed: 1, boiling water with strong fire, and 2, boiling with slow fire for 30 minutes;
with the latest definition: 30 yuan of fire, after 3 minutes, 6 yuan of fire, decoct for 30 minutes;
or decocting 25 yuan of fire for 3.6 minutes and 6 yuan of fire for 30 minutes;
the involved tempers were Hp1=30 × 3(Y min) Hp2=6 × 30(Y min), respectively;
and Hp1=25 × 3.6(Y min) Hp2=6 × 30(Y min);
the quantitative indexes of firepower and duration of a fire in the processing process of the material can be clearly defined, and the material is convenient to use in the field of intelligent control of fire later and has better unified standard.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A method for defining fire power and duration is characterized in that: comprises the following steps;
step (1), defining: 1 yuan of firepower represents a certain mass of heated materials, and in the process of absorbing heat and raising temperature without changing the state, the 1 yuan of firepower can raise the temperature by 1 ℃ in the heating process for 1 minute;
wherein, the firepower unit is defined as 'element' and is represented by the character 'Y';
step (2), according to an endothermic formula: q = cm Δ t, available: 1Y = cm, wherein: c: as the specific heat capacity of the heat absorbing object, m: is the mass of the heat absorbing object;
and (3) obtaining a formula for calculating firepower as follows:
wherein:
: is the specific heat capacity of the container,
: is the mass of the container;
and (4) determining the definition of the relationship between the element and common micro-fire, slow fire, medium fire, strong fire and violent fire:
wherein: and (3) micro fire: 0-4 yuan fire power;
slow fire: 4-8 yuan fire power;
middle fire: 8-16 yuan fire power;
and (3) strong fire: 16-32 yuan fire power;
violent fire: 32-64 yuan fire power;
and (5) defining a calculation expression of the duration of heat as follows: hp = Y × t;
wherein: hp: duration, Y: firepower, t: and (4) heating time.
2. A method for defining a fire power according to claim 1, wherein: in the step (4), the 0-4 yuan fire is 1L of water which is boiled for more than 20 minutes and has the temperature of 20 ℃ (standard atmospheric pressure).
3. A method for defining a fire power according to claim 1, wherein: in the step (4), the 4-8 yuan fire power is 1L of water at 20 ℃ in about 10-20 minutes (standard atmospheric pressure).
4. A method for defining a fire power according to claim 1, wherein: in the step (4), the 8-16 yuan fire power is 1L of water with the temperature of 20 ℃ in about 5-10 minutes (standard atmospheric pressure).
5. A method for defining a fire power according to claim 1, wherein: in the step (4), the 16-32 yuan fire power is 1L of fire power of water at 20 ℃ in about 3-5 minutes (standard atmospheric pressure).
6. A method for defining a fire power according to claim 1, wherein: the 32-64 yuan fire in the step (4) is 1L of fire of water at 20 ℃ in about 2-3 minutes (standard atmospheric pressure).
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2020
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Patent Citations (6)
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| CN108158421A (en) * | 2016-12-07 | 2018-06-15 | 佛山市顺德区美的电热电器制造有限公司 | Cooking apparatus anti-dry method, apparatus and cooking apparatus |
| CN107192476A (en) * | 2017-05-27 | 2017-09-22 | 九阳股份有限公司 | A kind of slurry temperature detection method in cooking equipment |
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