CN204830058U - Gas formula cooking system with function is markd to automatic firepower - Google Patents

Abstract

The utility model provides a gas formula cooking system with function is markd to automatic firepower, it includes gas adjusting device and gas heating device. Wherein, this gas formula cooking system still includes: gas pressure detecting element for measure gas pressure and export the gas pressure detected signal, environmental parameter detecting element for measuring ring border temperature and atmospheric pressure and output environment temperature detected signal and atmospheric pressure detected signal, the control treater for receive gas pressure detected signal, ambient temperature detected signal and atmospheric pressure detected signal, and handle in order obtaining target gas pressure the ambient temperature that measures and atmospheric pressure, and export gas pressure ambient temperature 0 based on gas pressure and the target gas pressure who measures to gas adjusting device. The utility model provides a cooking system can realize stable firepower output under various operational environment to cook out stable quality's cooked food and other and cook food.

Description

There is the combustion type cooking system of automatic fire power calibrating function

Technical field

The utility model relates to cooking appliance field; More particularly, the utility model relates to a kind of combustion type cooking system with automatic fire power calibrating function.

Background technology

The cooking is heated and seasoning the Cooking Materials through various processing and sorting, is made into the process of all good dish of color, shape, nutrition.The kind of dish is complicated, and its cooking method also varies, and particularly for Chinese meal, its cooking method is especially various, such as fried, fried, cooked, fried, saute, quick-fried, stir-fry before stewing, steam, burn, boil, etc.For each dish and cooking method thereof, the grasp of the duration and degree of heating is all one of key factor.Such as, fry, quick-fried, cook, the multiplex very hot oven short-term training of skill and technique such as explode, the multiplex little fiery long-time cooking of skill and technique such as burning, stew, boil, boil in a covered pot over a slow fire.So-called grasp the duration and degree of heating, be exactly according to cooking method, vegetable feature and edible different specific requirements, regulate, control intensity of fire and the time of heating, raw-food material is cooked to meeting edible demand and reaching the quality standard of regulation.

The firepower of thermal source, the temperature of heat transfer medium and heat time are three staples forming the duration and degree of heating, and wherein, the thermic load that firepower can pass through used cooker is weighed.For gas combustion cooking utensil, the heat discharged in the unit interval when its thermic load refers to that combustion gas is burnt in cooker.The cooking, especially adopt semi-automatic or automatic-cooking system is cooked in a standardized way time, if setting or the adjustment of thermic load or firepower have error, when this error amount reaches the degree being enough to affect dish quality, the technological parameter relevant to the duration and degree of heating just must carry out corresponding correction or adjustment, otherwise can affect quality and the uniformity thereof of dish because the duration and degree of heating is incorrect.The research of the present inventor shows, when the deviation between actual firepower and the standard firepower of setting is more than 2%, will cause larger adverse effect to the quality of the responsive dish of part dish especially firepower.

For automatic or automanual cooking system, the parameter of the various reaction duration and degree of heating state such as the temperature of heat transfer medium, the temperature of cooked can be measured in theory, and then the intensity of fire of cooking system and the duration and degree of heating are controlled.Such as, Chinese patent CN03154580.1 discloses a kind of adjustable firepower cooker and cooking system thereof of belt sensor, this adjustable firepower cooker comprises at least one for measuring the sensor of duration and degree of heating state, it comprises the heat transfer medium of cooking-vessel and/or the physical quantity of cooked and/or chemical quantity and/or its variable quantity for detecting, and send measured data to control processor, control processor is dynamically judged in time and controls to cook the duration and degree of heating.

In gastronomical process, make a variety of causes such as irregular motion due to cooked in cooking-vessel, the diabatic process between heat transfer medium and cooked is complicated and irregular, and the heat transfer medium being positioned at zones of different is usually not identical with the temperature of cooked.But, above existing cooking system is only measured the local of heat transfer medium and cooked, the data obtained due to this local measurement are difficult to representative, thus these measurement data can not reflect the real conditions of intensity of fire and the cooking duration and degree of heating exactly, control certainly namely accurate not according to the duration and degree of heating that these measurement data are carried out.

In addition, Chinese patent CN200910107623.8 discloses a kind of duration and degree of heating control system of the cooking system based on machine vision, the primary processor of cooking device and fire power regulator is coordinated to use, this duration and degree of heating control system comprises motion module, image image-forming module, thermal infrared sensor module, vision processing module and communication module, image image-forming module receives order or the information of primary processor, after image sampling is carried out to the dish cooked, by communication module, image information is sent to vision processing module, vision processing module processes in real time to image information, obtain the positional information of representative heat object, according to this positional information, motion module drives thermal infrared sensor module to carry out temperature sampling to representative heat object, and by communication module, this temperature information is sent to primary processor or the fire power regulator of cooking device.

Above-mentioned this duration and degree of heating control system theory can obtain representative temperature measuring data and realize the accurate control to the cooking duration and degree of heating, but it is complex structure not only, and for some cooking craft, especially for decocting, fried, fry, quick-fried, the cooking craft such as to saute, because now cooked is in the state of one " smoke fire burns " usually, thus the dish image that oil smoke can obtain image image-forming module forms interference, cause in fact being difficult to get correct representative heat object exactly, control certainly namely accurate not according to the duration and degree of heating that these incorrect measurement data are carried out.

Summary of the invention

For the deficiencies in the prior art, the purpose of this utility model is to provide a kind of combustion type cooking system, this combustion type cooking system can carry out automatic Calibration according to the change of working environment to its firepower, thus the stable firepower realized under different operating environment exports, accurately to control the cooking duration and degree of heating, and cook out dish and other cooked food of stay in grade.

In order to realize foregoing invention object, the utility model provides a kind of combustion type cooking system with automatic fire power calibrating function, it comprises gas regulating device and gas-operated thermal bath facility, and this gas regulating device is at least for the gaseous-pressure in regulating gas heater.Wherein, this combustion type cooking system also comprises: gaseous-pressure detecting unit, for measuring the gaseous-pressure of the gas pipeline being arranged in gas regulating device downstream on fuel gas flow direction, and based on measured gaseous-pressure generating gas pressure detecting signal; Ambient parameter detecting unit, for measures ambient temperature and atmospheric pressure, and based on measured environment temperature and atmospheric pressure build environment temperature detection signal and atmospheric pressure detection signal respectively; Control processor, for receiving gaseous-pressure detection signal, environment temperature detection signal and atmospheric pressure detection signal, and process to obtain target gaseous-pressure to measured environment temperature and atmospheric pressure, and export gaseous-pressure control signal based on measured gaseous-pressure and target gaseous-pressure to gas regulating device.

In combustion type cooking system of the present utility model, there is between the variablees such as thermic load and environment temperature, atmospheric pressure, gaseous-pressure following varying function relation (with reference to China's " household gas utensils " national standard):

In formula:

Φ _real-actual measurement thermic load, kW;

Q ₁-0 DEG C, test the low heat value of combustion gas, MJ/m under 101.3kPa state ³;

V-actual measurement gas flow, m ³/ h;

T _gfuel gas temperature in-gas meter, DEG C;

P _ambatmospheric pressure during-test, kPa;

P _mcombustion gas relative static pressure power in-actual measurement gas meter, kPa;

S-temperature is t _gtime saturation vapor pressure, kPa (when using dry type flowmeter survey, S value should be multiplied by be tested the relative humidity of combustion gas and revises).

The actual measurement reduced heat input of gas-operated thermal bath facility is calculated by following formula (2):

$\mathrm{\φ}=\frac{1}{3.6}\×\frac{273}{288}\×Q_1\×v\×\sqrt{\frac{d_a}{d_{mg}}}\×\frac{101.3+p_s}{101.3}\×\frac{p_{amb}+p_m}{p_{amb}+p_g}\×\sqrt{\frac{288}{273+t_g}\×\frac{p_{amb}+p_m-(1-0.622/d_a)\×S}{101.3+p_s}}......\left(2\right)$

In formula:

Φ-actual measurement reduced heat input, unit is kilowatt (kW);

Q ₁-0 DEG C, design the low heat value of gas under 101.3kPa state, unit is megajoule every cubic metre (MJ/m ³);

V-actual measurement gas flow, unit is a cube (m per hour ³/ h);

D _athe relative density of dry test gas under-standard state;

D _mgthe relative density of dry design gas under-standard state;

P _ambatmospheric pressure during-test, unit is kPa (kPa);

P _sthe specified gas supply pressure used during-design, unit is kPa (kPa);

P _mcombustion gas relative static pressure power in-actual measurement gas meter, unit is kPa (kPa);

T _gfuel gas temperature in-actual measurement gas meter, unit is degree Celsius (DEG C);

S-temperature is t _gtime saturation vapor pressure, unit is kPa (kPa) (when using dry type flowmeter survey, S value should be multiplied by be tested the relative humidity of combustion gas and revises);

The relative density of 0.622-steam perfect gas.

By deducing above-mentioned formula, when a gas-operated thermal bath facility is when gas component, gaseous-pressure and gas valve aperture etc. are constant, fuel gas temperature and atmospheric pressure change to the interact relation of gas flow and thermic load respectively represented by following formula (3) and (4):

$\frac{{\mathrm{\ν}}_1}{{\mathrm{\ν}}_2}\≈\sqrt{\frac{T_2}{T_1}}\×\sqrt{\frac{p_{amb2}+2}{p_{amb1}+2}}\×\frac{p_{amb1}+2-s_1}{p_{amb2}+2-s_2}.........\left(3\right)$

In formula:

V ₁and v ₂-be respectively state 1 and state 2 time gas flow, m ³/ h;

T ₁and T ₂-be respectively state 1 and state 2 time fuel gas temperature, K;

P _amb1and P _amb2-be respectively state 1 and state 2 time atmospheric pressure, kPa;

S ₁and s ₂-be respectively state 1 and state 2 time saturation vapor pressure corresponding to corresponding fuel gas temperature, kPa.

$\frac{{\mathrm{\Φ}}_1}{{\mathrm{\Φ}}_2}=\sqrt{\frac{T_2}{T_1}}\×\sqrt{\frac{p_{amb2}+2}{p_{amb1}+2}}\×\frac{p_{amb1}+2-s_1}{p_{amb2}+2-s_2}.........\left(4\right)$

In formula:

Φ ₁and Φ ₂-be respectively state 1 and state 2 time thermic load;

T ₁and T ₂-be respectively state 1 and state 2 time fuel gas temperature, K;

P _amb1and p _amb2-be respectively state 1 and state 2 time atmospheric pressure, kPa;

S ₁and s ₂-be respectively state 1 and state 2 time saturation vapor pressure corresponding to corresponding fuel gas temperature, kPa.

Another according to hydrodynamics, Bernoulli equation, can obtain following formula (5):

$P+\frac{1}{2}{\mathrm{\ρV}}^2=C......\left(5\right)$

In formula:

P is gas pressure;

ρ is gas density;

V is gas flow rate;

C is Bernoulli constant.

In conjunction with above formula (3) to (5), following formula (6) can be drawn:

$\frac{P_1-C_1}{P_2-C_1}={\left(\frac{{\mathrm{\Φ}}_1}{{\mathrm{\Φ}}_2}\right)}^2=\frac{T_2}{T_1}\×\frac{p_{amb2}+2}{p_{amb1}+2}\×{\left(\frac{p_{amb1}+2-s_1}{p_{amb2}+2-s_2}\right)}^2=\mathrm{\η}......\left(6\right)$

In formula:

P ₁and P ₂-be respectively state 1 and state 2 time combustion gas export time pressure, kPa;

T ₁and T ₂-be respectively state 1 and state 2 time fuel gas temperature (K), because combustion gas is normally supplied by pipeline or bottled mode, therefore fuel gas temperature is only approximately environment temperature;

P _amb1and p _amb2-be respectively state 1 and state 2 time atmospheric pressure, kPa;

S ₁and s ₂-be respectively state 1 and state 2 time saturation vapor pressure corresponding to corresponding fuel gas temperature, kPa;

C ₁and C ₂-be respectively state 1 and state 2 time corresponding combustion gas Bernoulli constant.

From above formula (4), as fuel gas temperature T (being approximately environment temperature), atmospheric pressure P _ambwhen changing with any one in saturation vapor pressure, the thermic load of gas-operated thermal bath facility will change.Such as, when the geographical position residing for cooking system is different, may there is difference due to the difference of atmospheric pressure and environment temperature in its firepower exported; And, even if for having the cooking system determining position, its working environment also may change because of climate change and/or other reasons, such as, after cooking system runs certain hour, its environment temperature may be higher than environment temperature when bringing into operation, and this is because cooking system can the cause of Environment release heat towards periphery in running.

Therefore, constant for ensureing that thermic load exports, gaseous-pressure P just should change.If environment temperature T ₂, atmospheric pressure P _amb2, and gaseous-pressure P ₂for given value under a certain state, and environment temperature degree T under another state can be measured ₁, atmospheric pressure P _amb1, introduce the adjusted coefficient K of the impact such as other factors of reacting such as combustion gas Wobbe index simultaneously, can be released by formula (6):

${p_1}^{\′}-C_1=K\×\frac{1}{\mathrm{\η}}\left(P_2-C_2\right)=K\×\frac{T_1}{T_2}\×\frac{p_{amb1}+2}{p_{amb2}+2}\×{\left(\frac{p_{amb2}+2-s_2}{p_{amb1}+2-s_1}\right)}^2\×\left(P_2-C_2\right)......\left(7\right)$

In formula, p ₁' should be the gas pressure force value after adjustment.

C in formula (7) ₁and C ₂when value is 0, following formula (8) can be obtained:

${p_1}^{\′}=K\×\frac{1}{\mathrm{\η}}{P}_2=K\×\frac{T_1}{T_2}\×\frac{p_{amb1}+2}{p_{amb2}+2}\×{\left(\frac{p_{amb2}+2-s_2}{p_{amb1}+2-s_1}\right)}^2\×P_2......\left(8\right)$

Combustion type cooking system of the present utility model, especially semi-automatic or automatic gas formula cooking system, standardized cooking program is adopted to cook, the wherein intensity of fire (firepower gear) of established standards and the heat time in cooking program, to obtain the qualified and stable dish of quality and other cooked food.Therefore, to combustion type cooking system of the present utility model, especially semi-automatic or automatic gas formula cooking system, initial firepower demarcation is carried out under initial alignment environment, to make each firepower gear have standardized intensity of fire, and gaseous-pressure corresponding to each firepower gear under obtaining this initial alignment environment.That is, to combustion type cooking system of the present invention, especially semi-automatic or automatic gas formula cooking system, the environment temperature T under its initial alignment environment ₂, atmospheric pressure P _amb2, corresponding to each thermic load gaseous-pressure P ₂, and saturation vapor pressure s ₂determine.Therefore, combustion type cooking system of the present utility model is according to environment temperature T measured under current operating environment ₁with atmospheric pressure P _amb1, and current operating environment under saturation vapor pressure s ₁the target gaseous-pressure that will obtain under current operating environment required for equal with the thermic load of initial alignment or substantially equal thermic load just automatically can be determined based on the relation represented by above-mentioned formula (8), and can according to the comparison result between target gaseous-pressure and measured gaseous-pressure, gaseous-pressure is controlled automatically or regulates, thus the stable firepower realized under different operating environment exports.

Combustion type cooking system of the present utility model both can carry out initial firepower demarcation before dispatching from the factory under initial alignment environment, also can carry out initial firepower demarcation making land used under initial alignment environment.When the combustion gas adopted when the combustion gas that initial timing signal adopts and work has identical Wobbe index, the value of adjusted coefficient K can be 1.Such as, due to each department use the Wobbe index of combustion gas normally identical, therefore, when making land used carry out initial firepower timing signal, the value of adjusted coefficient K can be 1.

According to a detailed description of the invention of the present utility model, control processor comprises processing unit and memory cell, store in memory cell represent environment temperature, environment temperature, the atmospheric pressure-target gaseous-pressure relation table of corresponding relation between atmospheric pressure and target gaseous-pressure, processing unit inquires about this relation table to obtain target gaseous-pressure based on measured environment temperature and atmospheric pressure.

In this specific embodiment, various working environment can be founded in laboratory, and using gaseous-pressure measured time equal with the thermic load of initial alignment for the actual measurement thermic load of cooking system under each environment temperature and atmospheric pressure or substantially equal as target gaseous-pressure, thus obtain environment temperature, atmospheric pressure-target gaseous-pressure relation table; Or the target gaseous-pressure that will obtain at each specific environment temperature and atmospheric pressure required for equal with the thermic load of initial alignment or substantially equal thermic load can be determined according to above-mentioned formula (8), thus obtain environment temperature, atmospheric pressure-target gaseous-pressure relation table.Wherein, environment temperature, atmospheric pressure-target gaseous-pressure relation table can run corresponding program by combustion type cooking system and obtain, and also can be inputted by outside.

According to another detailed description of the invention of the present utility model, control processor has the algorithm according to measured environment temperature and atmospheric pressure determination target gaseous-pressure, and obtains target gaseous-pressure according to this algorithm.

According to another detailed description of the invention of the present utility model, control processor also for processing to obtain saturation vapor pressure to measured environment temperature, and processes to obtain target gaseous-pressure to saturation vapor pressure and measured environment temperature and atmospheric pressure.

In the utility model, control processor can obtain saturation vapor pressure by the relation table of inquiry environment temperature and saturation vapor pressure, also can carry out calculation process to obtain saturation vapor pressure according to the empirical equation of saturation vapor pressure and environment temperature relation to measured environment temperature.

According to another detailed description of the invention of the present utility model, combustion type cooking system comprises gas flow rate detecting unit further, it is for measuring the gas flow rate in gas pipeline, and based on measured gas flow rate to control processor transmission gas flow rate detection signal; Control processor is also for processing to measured gas flow rate and gaseous-pressure the Bernoulli constant obtaining combustion gas, and process to obtain the target gaseous-pressure after correcting to the Bernoulli constant of combustion gas and measured environment temperature and atmospheric pressure, and export gaseous-pressure control signal based on measured gaseous-pressure and the target gaseous-pressure after correcting to gas regulating device.

In the utility model, by carrying out the test and appraisal of more than twice or twice to gas flow rate and gaseous-pressure, and according to above-mentioned formula (5), the Bernoulli constant C of combustion gas under corresponding state just can be obtained.

In the utility model, the target gaseous-pressure after correction obtains by following formula (9):

${p_1}^{\′\′}-C_1=K\×\frac{T_1}{T_2}\×\frac{p_{amb1}+2}{p_{amb2}+2}\×{\left(\frac{p_{amb2}+2-s_2}{p_{amb1}+2-s_1}\right)}^2\×(P_2-C_2)......\left(9\right)$

In formula:

P ₁" be the target gaseous-pressure after correction;

K is correction factor;

P ₂for the gaseous-pressure under initial alignment environment;

T ₁and T ₂the environment temperature under measured environment temperature and initial alignment environment respectively;

P _amb1and P _amb2the atmospheric pressure under measured atmospheric pressure and initial alignment environment respectively;

S ₁and s ₂the saturation vapor pressure under current operating environment and initial alignment environment respectively;

C ₁and C ₂the Bernoulli constant of combustion gas in gas pipeline under current operating environment and initial alignment environment respectively.

From above technical scheme, by correcting target gaseous-pressure, combustion type cooking system of the present utility model can control more accurately its intensity of fire and regulate.Further, the Bernoulli constant C of combustion gas when considering that cooking system works can produce dynamic change, also can dynamically carry out the correction of target gaseous-pressure.

According to another detailed description of the invention of the present utility model, combustion type cooking system comprises gas flow detecting unit further, it is for measuring the gas flow in gas pipeline, and based on measured gas flow to control processor transmission gas flow detection signal; Control processor also for obtaining target gas flow according to conversion formula or form, and exports gas flow control signal based on measured gas flow and described target gas flow to gas regulating device.Wherein, gas flow directly can be measured and obtain, and also by measuring gas flow rate, and gas flow rate can be converted to gas flow and indirect inspection obtains.

In technique scheme, control processor by the following conversion formula (10) of computing and under obtaining each working environment, the thermic load of combustion type cooking system is equal with the thermic load of initial alignment or substantially equal time required target gas flow:

$\mathrm{\Φ}=\frac{1}{3.6}\×V\×Q_1\×\frac{273}{273+t_g}\×\frac{p_{amb}+p_m-S}{101.3}.........\left(10\right)$

In formula:

Φ-initial alignment thermic load, kW;

Q ₁-0 DEG C, the low heat value of combustion gas under 101.3kPa state, MJ/m ³;

V-target gas flow, m ³/ h;

T _genvironment temperature measured under-current operating environment, DEG C;

P _ambatmospheric pressure measured under-current operating environment, kPa;

P _mcombustion gas relative static pressure power in-actual measurement gas meter, kPa;

S-temperature is t _gtime saturation vapor pressure, kPa (when use dry type flowmeter survey time, the relative humidity that S value should be multiplied by combustion gas is revised).

Or, can obtain representing combustion gas relative static pressure power under each intensity of fire, environment temperature and the converting form of corresponding relation between atmospheric pressure and target gas flow in advance according to above-mentioned formula (10), control processor obtains target gas flow by inquiring about this converting form.

Carry out control by regulating gas pressure to intensity of fire and have fireballing advantage, this is particularly suitable for combustion type cooking system carries out quick adjustment requirement to intensity of fire.And control to have the higher advantage of control accuracy by adjustment of combustion gas flow to intensity of fire, but it requires longer regulating time.In technique scheme, adopt regulating gas pressure and gas flow to control intensity of fire simultaneously, there is the significant advantage that governing speed is fast, precision is high.

According to another detailed description of the invention of the present utility model, ambient parameter detecting unit comprises environment temperature detecting unit and atmospheric pressure detection unit, environment temperature detecting unit is used for measures ambient temperature and based on measured environment temperature build environment temperature detection signal, atmospheric pressure detection unit is for measuring atmospheric pressure and generating atmospheric pressure detection signal based on measured atmospheric pressure.

According to another detailed description of the invention of the present utility model, ambient parameter detecting unit comprises environment temperature and atmospheric pressure detection unit, and it is for measures ambient temperature and atmospheric pressure and based on measured environment temperature and atmospheric pressure build environment temperature detection signal and atmospheric pressure detection signal respectively.This considers that atmospheric pressure detection unit is when measuring atmospheric pressure, needs measures ambient temperature to carry out the static drift of automatic calibration wherein sensor; Further, with while environment for use temperature detecting unit compare with atmospheric pressure detection unit, the cost of environment for use temperature and atmospheric pressure detection unit is lower.

According to another detailed description of the invention of the present utility model, gas regulating device comprises with motor and/or the signal of telecommunication and/or other drive unit is direct and/or indirectly drive to carry out gas control valve that is multistage and/or stepless continuous adjustment.

According to another detailed description of the invention of the present utility model, between ambient parameter detecting unit and control processor, between gaseous-pressure detecting unit and control processor, between control processor and gas regulating device, Signal transmissions can be carried out by wired or wireless mode.

According to another detailed description of the invention of the present utility model, gaseous-pressure detecting unit comprises pressure sensor, such as differential pressure pick-up, and this pressure sensor is arranged on the gas pipeline between gas regulating device and gas nozzle.Another enforceable mode is on this gas pipeline, arrange coal gas detection bypass, and pressure sensor is arranged in this coal gas detection bypass.

According to another detailed description of the invention of the present utility model, combustion type cooking system is automatic or semiautomatic gas formula cooking system.

Combustion type cooking system of the present utility model can according to the change of its working environment dynamically and automatically demarcate intensity of fire, to export the thermic load identical or roughly the same with initial alignment numerical value under various working environment, thus realize the stable output of firepower.Therefore, combustion type cooking system of the present utility model can realize the accurate control to the cooking duration and degree of heating, and cooks out dish and other cooked food of stay in grade.

In order to more clearly set forth the purpose of this utility model, technical scheme and advantage, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.In each accompanying drawing, identical Reference numeral has identical implication.

Accompanying drawing explanation

Fig. 1 is the structured flowchart of the utility model combustion type cooking system embodiment 1;

Fig. 2 is that the automatic fire power of the utility model combustion type cooking system embodiment 1 demarcates flow chart;

Fig. 3 is according to the flow chart that corrects of the intensity of fire of target gaseous-pressure to the utility model combustion type cooking system embodiment 1 after correcting;

Fig. 4 is the flow chart corrected according to the intensity of fire of target gas flow to the utility model combustion type cooking system embodiment 1;

Fig. 5 is the structured flowchart of the utility model combustion type cooking system embodiment 2;

Fig. 6 is that the automatic fire power of the utility model combustion type cooking system embodiment 2 demarcates flow chart.

Detailed description of the invention

Embodiment 1

Fig. 1 is the structured flowchart that the utility model has the combustion type cooking system embodiment 1 of automatic fire power calibrating function.Wherein, 1 represents gaseous-pressure detecting unit, and 2 represent atmospheric pressure detection unit, and 3 represent environment temperature detecting unit, 4 represent control processor, 41 represent memory cell, and 42 represent processing unit, and 5 represent gas regulating device, 6 represent gas-operated thermal bath facility, 7 represent gas pipeline, and 8 represent gas meter, and 9 represent gas flow rate detecting unit.

Gaseous-pressure detecting unit 1 comprises gaseous-pressure sensor and gaseous-pressure detects and change-over circuit, atmospheric pressure detection unit 2 comprises barometric pressure sensor and atmospheric pressure detection and change-over circuit, environment temperature detecting unit 3 comprises environment temperature sensor and environment temperature detects and change-over circuit, gas regulating device 5 comprises proportioning valve and valve activator, and gas flow rate detecting unit 9 comprises gas flow rate sensor and gas flow rate detects and change-over circuit.Wherein, environment temperature sensor and barometric pressure sensor are arranged on the shell body of cooking system, are easy to contact with environment facies and avoid the interference of thermal source as far as possible; Gaseous-pressure sensor is arranged on the gas pipeline between proportioning valve and the gas nozzle of gas-operated thermal bath facility; Gas flow rate sensor is arranged on the gas pipeline between gas meter 8 and proportioning valve; Gaseous-pressure detects and change-over circuit, atmospheric pressure detection and change-over circuit, environment temperature detection and change-over circuit, gas flow rate detection and change-over circuit are integrated on the control circuit board of control processor 4.

As shown in Figure 1, gaseous-pressure detecting unit 1 for the gaseous-pressure in the gas pipeline between measurement scale valve and gas nozzle, and based on measured gaseous-pressure generating gas pressure detecting signal; Atmospheric pressure detection unit 2 for measuring atmospheric pressure, and generates atmospheric pressure detection signal based on measured atmospheric pressure; Environment temperature detecting unit 3 for measures ambient temperature, and based on measured environment temperature build environment temperature detection signal; Gas flow rate detecting unit 9 for the gas flow rate in the gas pipeline between measurement scale valve and gas meter 8, and based on measured gas flow rate generating gas flow rate detection signal.Gaseous-pressure detection signal, atmospheric pressure detection signal, environment temperature detection signal and gas flow rate detection signal input and are stored in memory cell 41; Simultaneously, also store in memory cell 41 and represent environment temperature under each thermic load and environment temperature, the atmospheric pressure-target gaseous-pressure relation table of corresponding relation between atmospheric pressure and target gaseous-pressure, environment temperature and saturation vapor pressure relation table, and the data such as cooking program.Corresponding data in processing unit 42 reading cells 41 also exports gaseous-pressure as required and gas flow controls signal to gas regulating device 5.

In the present embodiment, target gaseous-pressure and there is between environment temperature and atmospheric pressure the functional relation shown in following formula (8):

${p_1}^{,}=K\×\frac{T_1}{T_2}\×\frac{p_{amb1}+2}{p_{amb2}+2}\×{\left(\frac{p_{amb2}+2-s_2}{p_{amb1}+2-s_1}\right)}^2\×P_2......\left(8\right)$

In formula:

P ₁' be target gaseous-pressure, kPa;

K is correction factor, for fixed case if other factors such as combustion gas Wobbe index are on the impact of target gaseous-pressure;

P ₂for the gaseous-pressure under initial alignment environment, kPa;

T ₁and T ₂-be environment temperature under predetermined work environment and initial alignment environment respectively, K;

P _amb1and P _amb2-be atmospheric pressure under predetermined work environment and initial alignment environment respectively, kPa;

S ₁and s ₂-be the saturation vapor pressure corresponding with predetermined work environment temperature and initial alignment environment temperature respectively, kPa.Saturation vapor pressure is obtained by inquiry environment temperature and saturation vapor pressure relation table.

For combustion type cooking system of the present utility model, its initial alignment environment and the gaseous-pressure corresponding with each initial alignment thermic load are well-determined, just can calculate the target gaseous-pressure that will to obtain under predetermined work environment required for equal with the thermic load of initial alignment or substantially equal thermic load according to above formula (8), and then obtain representing environment temperature and environment temperature, the atmospheric pressure-target gaseous-pressure relation table of corresponding relation between atmospheric pressure and target gaseous-pressure.

Fig. 2 is that the automatic fire power of the present embodiment combustion type cooking system demarcates flow chart.As shown in Figure 2, first, under initial alignment environment, initial firepower demarcation is carried out to cooking system, and determine the target gaseous-pressure that will reach at each specific environment temperature and atmospheric pressure required for each intensity of fire of initial alignment according to above formula (8), to obtain environment temperature, atmospheric pressure-target gaseous-pressure relation table be stored to memory cell 41.Before the cooking or in gastronomical process, automatic fire power is carried out to cooking system and demarcates to realize stable firepower output, for this reason, atmospheric pressure detection unit 2 measures current atmospheric pressure, environment temperature detecting unit 3 measures current environmental temperature, the current gas pressure that gaseous-pressure detecting unit 1 is measured, control processor 4 is by inquiry environment temperature, atmospheric pressure-target gaseous-pressure relation table determines or immediate atmospheric pressure identical with environment temperature with measured atmospheric pressure and environment temperature, thus obtain the target gaseous-pressure corresponding with it, and the gaseous-pressure that this target gaseous-pressure and gaseous-pressure detecting unit 1 are surveyed is compared, if comparison result does not have deviation, although or have deviation, but this deviation within the range of permission, obvious or unacceptable impact is not had on dish quality, then need not regulate, if there is unallowed deviation in comparison result, then export gaseous-pressure and control signal to gas regulating device 5, gas regulating device 5 according to the aperture of the automatic resize ratio valve of this control signal, thus makes gaseous-pressure reach or close to target gaseous-pressure.

Further, as shown in Figure 3, control processor 4 also corrects to obtain the target gaseous-pressure after correcting to target gaseous-pressure after automatic fire power has been demarcated, and the comparison result of the gaseous-pressure of surveying according to target gaseous-pressure and the gaseous-pressure detecting unit 1 after correcting, output gaseous-pressure controls signal to gas regulating device 5; Gas regulating device 5 according to the aperture of the automatic resize ratio valve of this control signal, thus gaseous-pressure is reached or close to correct after target gaseous-pressure.

Wherein, control processor 4 has corresponding software program or logical operation circuit, to obtain the target gaseous-pressure after correcting according to the algorithm represented by following formula (9):

${p_1}^{\′\′}-C_1=K\×\frac{T_1}{T_2}\×\frac{p_{amb1}+2}{p_{amb2}+2}\×{\left(\frac{p_{amb2}+2-s_2}{p_{amb1}+2-s_1}\right)}^2\×(P_2-C_2)......\left(9\right)$

In formula:

P ₁" be the target gaseous-pressure after correction;

K is correction factor, for fixed case if other factors such as combustion gas Wobbe index are on the impact of target gaseous-pressure;

P ₂for the gaseous-pressure under initial alignment environment;

T ₁and T ₂the environment temperature under measured environment temperature and initial alignment environment respectively;

P _amb1and P _amb2the atmospheric pressure under measured atmospheric pressure and initial alignment environment respectively;

S ₁and s ₂the saturation vapor pressure under current operating environment and initial alignment environment respectively;

C ₁and C ₂the Bernoulli constant of combustion gas in gas pipeline under current operating environment and initial alignment environment respectively, its by control processor by processing measured gas flow rate and gaseous-pressure and obtain.

Meanwhile, the combustion type cooking system of the present embodiment is also controlled its intensity of fire by adjustment of combustion gas flow, to realize the stable output of firepower.Further, the adjustment of gas flow is normally carried out after the adjustment of gaseous-pressure.In order to realize the adjustment of gas flow, as shown in Figure 4, first, control processor 4 obtains target gas flow, and processes to obtain actual gas flow to the gas flow rate measured by gas flow rate detecting unit 9 (now also as gas flow detecting unit); Then, control processor 4 is according to the comparison result of target gas flow and actual gas flow, export gaseous-pressure and control signal to gas regulating device 5, gas regulating device 5 according to the aperture of the automatic resize ratio valve of this control signal, thus makes gas flow reach or close to target gas flow.

Wherein, control processor 4 has corresponding software program or logical operation circuit, to obtain target gas flow according to the algorithm represented by following formula (10):

$\mathrm{\Φ}=\frac{1}{3.6}\×V\×Q_1\×\frac{273}{273+t_g}\×\frac{p_{amb}+p_m-S}{101.3}.........\left(10\right)$

In formula:

Φ-initial alignment thermic load, kW;

Q ₁-0 DEG C, the low heat value of combustion gas under 101.3kPa state, MJ/m ³;

V-target gas flow, m ³/ h;

T _genvironment temperature measured under-current operating environment, DEG C;

P _ambatmospheric pressure measured under-current operating environment, kPa;

P _mcombustion gas relative static pressure power in-actual measurement gas meter, kPa;

S-temperature is t _gtime saturation vapor pressure, kPa (when use dry type flowmeter survey time, the relative humidity that S value should be multiplied by combustion gas is revised).

Under the various working environments different from initial alignment environment, the thermic load of the combustion type cooking system of the present embodiment is measured, result shows, the deviation under these working environments between the actual measurement thermic load of each firepower gear and the thermic load of initial alignment is less than 0.02kW.

Embodiment 2

Fig. 5 is the structured flowchart that the utility model has the combustion type cooking system embodiment 2 of automatic fire power calibrating function.Wherein, 1 represents gaseous-pressure detecting unit, and 23 represent environment temperature and atmospheric pressure detection unit, 4 represent control processor, and 5 represent gas regulating device, and 6 represent gas-operated thermal bath facility, 7 represent gas pipeline, and 8 represent gas meter, and 9 represent gas flow rate detecting unit.

Gaseous-pressure detecting unit 1 comprises the gaseous-pressure sensor and gaseous-pressure detection and change-over circuit that become one, environment temperature and atmospheric pressure detection unit 23 comprise the environment temperature and barometric pressure sensor and corresponding detection and change-over circuit that become one, environment temperature detecting unit 3 comprises the environment temperature sensor and environment temperature detection and change-over circuit that become one, gas regulating device 5 comprises proportioning valve and valve activator, gas flow rate detecting unit 9 comprises the gas flow rate sensor and gas flow rate detection and change-over circuit that become one.Wherein, environment temperature and atmospheric pressure detection unit 23 are arranged on the shell body of cooking system; Gaseous-pressure detecting unit 1 is arranged on the gas pipeline 7 between proportioning valve and the gas nozzle of gas-operated thermal bath facility; Gas flow rate sensor is arranged on the gas pipeline between gas meter 8 and proportioning valve; Gaseous-pressure detecting unit 1, environment temperature and atmospheric pressure detection unit 23, gas regulating device 5 and gas flow rate detecting unit 9 wirelessly carry out Signal transmissions with control processor 4 respectively.

As shown in Figure 5, gaseous-pressure detecting unit 1 for the gaseous-pressure in the gas pipeline between measurement scale valve and gas nozzle, and based on measured gaseous-pressure generating gas pressure detecting signal; Environment temperature and atmospheric pressure detection unit 23 for measures ambient temperature and atmospheric pressure, and distinguish build environment temperature detection signal and atmospheric pressure detection signal based on measured environment temperature and atmospheric pressure; Gas flow rate detecting unit 9 for the gas flow rate in the gas pipeline between measurement scale valve and gas meter 8, and based on measured gas flow rate generating gas flow rate detection signal.Control processor 4 carries out calculation process to obtain target gaseous-pressure to measured atmospheric pressure and environment temperature, and exports gaseous-pressure adjustment signal as required to gas regulating device 5.

In the present embodiment, control processor 4 has corresponding software program or logical operation circuit, with according to the algorithm determination target gaseous-pressure represented by following formula (8):

${p_1}^{,}=K\×\frac{T_1}{T_2}\×\frac{p_{amb1}+2}{p_{amb2}+2}\×{\left(\frac{p_{amb2}+2-s_2}{p_{amb1}+2-s_1}\right)}^2\×P_2......\left(8\right)$

In formula:

P ₁' be target gaseous-pressure, kPa;

K is correction factor, for fixed case if other factors such as combustion gas Wobbe index are on the impact of target gaseous-pressure;

P ₂for the gaseous-pressure under initial alignment environment, kPa;

T ₁and T ₂-be environment temperature under measured environment temperature and initial alignment environment respectively, K;

P _amb1and P _amb2-be atmospheric pressure under measured atmospheric pressure and initial alignment environment respectively, kPa;

S ₁and s ₂-be the saturation vapor pressure corresponding with measured environment temperature and initial alignment environment temperature respectively, kPa.Saturation vapor pressure is obtained by inquiry environment temperature and saturation vapor pressure relation table.

For combustion type cooking system of the present utility model, its initial alignment environment and the gaseous-pressure corresponding with each initial alignment thermic load are well-determined, just can calculate the target gaseous-pressure that will to obtain under current operating environment required for equal with the thermic load of initial alignment or substantially equal thermic load according to above formula (8).

Fig. 6 is that the automatic fire power of the present embodiment combustion type cooking system demarcates flow chart.As shown in Figure 6, first, under initial alignment environment, initial firepower demarcation is carried out to cooking system.Before the cooking or in gastronomical process, automatic fire power is carried out to cooking system and demarcates to realize stable firepower output, for this reason, gaseous-pressure detecting unit 1 measures current gas pressure, and environment temperature and atmospheric pressure detection unit 23 measure current environmental temperature and atmospheric pressure, control processor 4 obtains current saturation vapor pressure by inquiry environment temperature and saturation vapor pressure relation table, and the algorithm represented by above-mentioned formula (8) carries out calculation process to measured environment temperature and atmospheric pressure, obtain the target gaseous-pressure corresponding with current operating environment, and the gaseous-pressure that this target gaseous-pressure and gaseous-pressure detecting unit 1 are surveyed is compared, if comparison result does not have deviation, although or have deviation, but this deviation within the range of permission, then need not regulate, if there is unallowed deviation in comparison result, then export gaseous-pressure and control signal to gas regulating device 5, gas regulating device 5 according to the aperture of the automatic resize ratio valve of this control signal, thus makes gaseous-pressure reach or close to target gaseous-pressure.

In the present embodiment, identical with embodiment 1 is, also correct to obtain the target gaseous-pressure after correcting to target gaseous-pressure after automatic fire power has been demarcated, and according to the comparison result of gaseous-pressure of the target gaseous-pressure after correcting and actual measurement, gaseous-pressure is controlled or regulates.Further, same identical with embodiment 1, the combustion type cooking system of the present embodiment is also controlled its intensity of fire by adjustment of combustion gas flow, to realize the stable output of firepower.

Under the various working environments different from initial alignment environment, the thermic load of the combustion type cooking system of the present embodiment is measured, result shows, the deviation under these working environments between the actual measurement thermic load of each firepower gear and the thermic load of initial alignment is less than 0.02kW.

Comparative example

As a comparison case be a kind of combustion type cooking system without automatic fire power calibrating function, respectively illustrate this combustion type cooking system under different from initial alignment environment two kinds of working environments with following table 1 and table 2, the actual measurement thermic load of each firepower gear and and initial alignment thermic load between deviation.

Table 1

Table 2

Known by the measured data of above table 1 and table 2, even if under the working environment be more or less the same with initial alignment environment, deviation between the actual measurement thermic load of the combustion type cooking system of comparative example and initial alignment thermic load also can be greater than 0.02kW in most cases, and the deviation between actual measurement thermic load and initial alignment thermic load increases along with the increase of gap between working environment and initial alignment environment, this can badly influence quality and the uniformity thereof of dish and other cooked food.On the other hand, the deviation that the utility model has between the actual measurement thermic load of combustion type cooking system each firepower gear under above two kinds of working environments of automatic fire power calibrating function and the thermic load of initial alignment is all less than 0.02kW.

It should be noted that the various aspects of above described embodiment can carry out mutual combination and/or replacement, unless this combination and/or there is the situation mutually repelled between replacing it.

The utility model is depicted by embodiment although above, but should be understood that, those of ordinary skill in the art are not departing from invention scope of the present utility model, and the equal improvement done according to the utility model, should be invention scope of the present utility model and contained.

Claims (10)

1. one kind has the combustion type cooking system of automatic fire power calibrating function, it comprises gas regulating device and gas-operated thermal bath facility, described gas regulating device at least for regulating the gaseous-pressure in described gas-operated thermal bath facility, is characterized in that, described combustion type cooking system also comprises:

Gaseous-pressure detecting unit, for measuring the gaseous-pressure of the gas pipeline being arranged in described gas regulating device downstream on fuel gas flow direction, and based on measured gaseous-pressure generating gas pressure detecting signal;

Ambient parameter detecting unit, for measures ambient temperature and atmospheric pressure, and based on measured environment temperature and atmospheric pressure build environment temperature detection signal and atmospheric pressure detection signal respectively;

Control processor, for receiving described gaseous-pressure detection signal, described environment temperature detection signal and described atmospheric pressure detection signal, and process to obtain target gaseous-pressure to measured environment temperature and atmospheric pressure, and export gaseous-pressure control signal based on measured gaseous-pressure and described target gaseous-pressure to described gas regulating device.

2. combustion type cooking system as claimed in claim 1, it is characterized in that, described control processor comprises processing unit and memory cell, store environment temperature, atmospheric pressure-target gaseous-pressure relation table in described memory cell, described processing unit inquires about described relation table to obtain described target gaseous-pressure based on measured environment temperature and atmospheric pressure.

3. combustion type cooking system as claimed in claim 1, it is characterized in that, described control processor has the algorithm determining described target gaseous-pressure according to measured environment temperature and atmospheric pressure, and obtains described target gaseous-pressure according to described algorithm.

4. combustion type cooking system as claimed in claim 1, it is characterized in that, described control processor also for processing to obtain saturation vapor pressure to measured environment temperature, and processes to obtain described target gaseous-pressure to described saturation vapor pressure and measured environment temperature and atmospheric pressure.

5. combustion type cooking system as claimed in claim 1, it is characterized in that, this combustion type cooking system comprises gas flow rate detecting unit further, described gas flow rate detecting unit for measuring the gas flow rate in gas pipeline, and transmits gas flow rate detection signal based on measured gas flow rate to described control processor; Described control processor is also for processing to measured gas flow rate and gaseous-pressure the Bernoulli constant obtaining combustion gas, and process to obtain the target gaseous-pressure after correcting to described Bernoulli constant and measured environment temperature and atmospheric pressure, and export gaseous-pressure control signal based on measured gaseous-pressure and the target gaseous-pressure after correcting to described gas regulating device.

6. combustion type cooking system as claimed in claim 1, it is characterized in that, this combustion type cooking system comprises gas flow detecting unit further, described gas flow detecting unit for measuring the gas flow in gas pipeline, and transmits gas flow detection signal based on measured gas flow to described control processor; Described control processor also for obtaining target gas flow according to conversion formula or form, and exports gas flow control signal based on measured gas flow and described target gas flow to described gas regulating device.

7. combustion type cooking system as claimed in claim 1, it is characterized in that, described ambient parameter detecting unit comprises environment temperature detecting unit and atmospheric pressure detection unit, described environment temperature detecting unit is used for measures ambient temperature and based on measured environment temperature build environment temperature detection signal, described atmospheric pressure detection unit is for measuring atmospheric pressure and generating atmospheric pressure detection signal based on measured atmospheric pressure.

8. combustion type cooking system as claimed in claim 1, it is characterized in that, described ambient parameter detecting unit comprises environment temperature and atmospheric pressure detection unit, and it is for measures ambient temperature and atmospheric pressure and based on measured environment temperature and atmospheric pressure build environment temperature detection signal and atmospheric pressure detection signal respectively.

9. combustion type cooking system as claimed in claim 1, it is characterized in that, described gaseous-pressure detecting unit comprises pressure sensor, and described pressure sensor is arranged on the gas pipeline between described gas regulating device and gas nozzle.

10. combustion type cooking system as claimed in claim 1, is characterized in that, described combustion type cooking system is automatic or semiautomatic gas formula cooking system.