TWI614454B - Automatic firepower calibration method for gas cooking system and gas cooking system with automatic firepower calibration function - Google Patents

Abstract

The invention provides a gas cooking system with an automatic fire power calibration function, which includes a gas regulating device and a gas heating device. The gas cooking system further includes: a gas pressure detection unit for measuring the gas pressure and outputting a gas pressure detection signal; and an environmental parameter detection unit for measuring the ambient temperature and the atmospheric pressure and outputting an environmental temperature detection signal And atmospheric pressure detection signals; a control processor for receiving a gas pressure detection signal, an ambient temperature detection signal, and an atmospheric pressure detection signal, and processing the measured ambient temperature and atmospheric pressure to obtain a target gas pressure, and A gas pressure control signal is output to the gas regulating device based on the measured gas pressure and the target gas pressure. The invention also provides an automatic firepower calibration method for a gas cooking system. The invention can obtain the same or approximately the same firepower under various working environments, realize stable firepower output, and cook dishes and other cooking foods with stable quality.

Description

Gas cooking system with automatic fire calibration function and gas cooking Automatic fire calibration method

The present invention relates to the field of cooking appliances; more specifically, the present invention relates to a gas-fired cooking system with an automatic fire calibration function.

Cooking is the process of heating and seasoning the cooking ingredients that have undergone various processing and finishing, and making them into dishes with excellent color, aroma, taste, shape and nutrition. The types of dishes are complex, and their cooking techniques are also very different. Especially for Chinese dishes, their cooking techniques are particularly diverse, such as frying, frying, cooking, frying, slipping, popping, simmering, steaming, cooking, cooking, etc. For every dish and its cooking technique, the mastery of the heat is one of the key factors. For example, techniques such as frying, exploding, cooking, and frying are commonly used for rapid fire, and techniques such as burning, stewing, cooking, and braising are often cooked on low fire for a long time. The so-called mastery of the fire is to adjust and control the intensity and time of the heating power according to the cooking method, the characteristics of the dishes and the different specific requirements of the food.

The fire power of the heat source, the temperature of the heat transfer medium and the heating time are the three main elements that make up the heat of the fire. Among them, the fire power can be measured by the heat load of the cookware used. For a gas cooker, its heat load refers to the heat released per unit time when the gas is burned in the cooker. Cooking, especially when using a semi-automatic or automatic cooking system to cook in a standardized way, if there is an error in the setting or adjustment of the heat load or firepower, when the error value reaches a level that is sufficient to affect the quality of the dish, the process parameters related to the fire The number must be corrected or adjusted accordingly, otherwise the quality and consistency of the dish will be affected due to incorrect cooking conditions. Studies by the inventor have shown that when the deviation between the actual firepower and the set standard firepower exceeds 2%, it will cause a relatively large adverse effect on the quality of some dishes, especially fire-sensitive dishes.

For an automatic or semi-automatic cooking system, theoretically, it can measure various parameters such as the temperature of the heat transfer medium, the temperature of the object to be cooked, etc., to control the fire intensity and the heat of the cooking system. For example, Chinese patent CN03154580.1 discloses an adjustable firepower cooker with a sensor and a cooking system thereof. The adjustable firepower cooker includes at least one sensor for measuring the state of the fire, which is used for detecting The physical and / or chemical quantity and / or its variation of the heat transfer medium and / or the object being cooked, and transmit the measured data to the control processor, so that the control processor dynamically and timely judges and controls the cooking atmosphere .

During the cooking process, due to various reasons such as irregular movement of the object to be cooked in the cooking container, the heat transfer process between the heat transfer medium and the object to be cooked is complicated and irregular. The heat transfer medium and the object to be cooked are located in different areas. The temperature is usually not the same. However, the above existing cooking systems only measure parts of the heat transfer medium and the object being cooked. Since the data obtained by such local measurements are difficult to represent, these measurement data cannot accurately reflect the firepower intensity and cooking. The actual condition of the fire, of course, the fire control based on these measurements is not accurate enough.

In addition, Chinese patent CN200910107623.8 discloses a fire control system of a cooking system based on machine vision, which is used in conjunction with the main processor and the fire power adjustment device of the cooking equipment. The fire control system includes a motion module, an image imaging module, a thermal module Infrared sensor module, vision processing module and communication module, the image imaging module receives commands or information from the main processor, and after sampling images of the dishes being cooked, it sends the image information to the communication module through Vision processing module The information is processed in real time to obtain the position information of a typical heating object. Based on the position information, the motion module drives the thermal infrared sensor module to sample the temperature of the typical heating object, and sends the temperature information to the cooking device through the communication module. Main processor or power adjustment device.

The above-mentioned fire control system can theoretically obtain representative temperature measurement data and achieve accurate control of the cooking fire, but it is not only complicated in structure, but also for certain cooking processes, especially for frying, frying, frying, and exploding. In terms of cooking processes such as cooking and cooking, since the object to be cooked is usually in a "smoky fire" state at this time, the oil fume will interfere with the dish image obtained by the image imaging module, making it actually difficult to accurately Obtaining the correct typical heating object, of course, the fire control based on these incorrect measurement data is certainly not accurate enough.

In view of the shortcomings of the prior art, the object of the present invention is to provide a gas-fired cooking system and an automatic fire power calibration method for the gas-fired cooking system. The gas-fired cooking system can automatically calibrate its firepower according to changes in the working environment. So as to achieve a stable fire output under different working environments, to precisely control the cooking temperature, and to cook dishes and other cooking food with stable quality.

In one aspect, in order to achieve the above-mentioned object of the present invention, the present invention provides a gas-fired cooking system with an automatic fire calibration function, which includes a gas regulating device and a gas heating device. The gas regulating device is at least used to regulate gas heating. Gas pressure in the unit. The gas cooking system further includes a gas pressure detection unit for measuring a gas pressure in a gas pipeline located downstream of the gas regulating device in a gas flow direction, and based on the measured gas pressure Generate gas pressure detection signal; environmental parameter detection unit for measuring ambient temperature and atmospheric pressure, and based on the measured ambient temperature and atmospheric pressure The air pressure generates the ambient temperature detection signal and the atmospheric pressure detection signal respectively; the control processor is used to receive the gas pressure detection signal, the ambient temperature detection signal and the atmospheric pressure detection signal, and process the measured ambient temperature and atmospheric pressure To obtain the target gas pressure, and output a gas pressure control signal to the gas regulating device based on the measured gas pressure and the target gas pressure.

In the gas-fired cooking system of the present invention, the heat load and variables such as ambient temperature, atmospheric pressure, and gas pressure have the following variable function relationships (refer to the Chinese National Standard for Domestic Gas Cookers):

In the formula: Φ _actual -measured heat load, kW; Q ₁ -0 ℃, 101.3kPa state low heat value of test gas, MJ / m ³ ; V- actual measured gas flow, m ³ / h; t _g -fuel Gas temperature in the gas flow meter, ℃; P _amb -Atmospheric pressure during the test, kPa; P _m -Measured relative static pressure of the gas in the gas flow meter, kPa; S-Saturated water at temperature t _g Vapor pressure, kPa (when measured with a dry gas flow meter, the S value should be multiplied by the relative humidity of the test gas for correction).

The measured converted heat load of the gas heating device is calculated by the following formula (2):

In the formula: Φ-Measured converted thermal load, unit is kilowatt (kW); Q ₁ -0 ℃, low heat value of design gas at 101.3kPa, unit is megajoule per cubic meter (MJ / m ³ ); v-measured Gas flow rate in cubic hours per hour (m ³ / h); d _a -relative density of dry test gas under standard conditions; d _mg -relative density of dry design gas under standard conditions; p _amb -atmospheric pressure during testing , Unit is kilopascal (kPa); p _s -rated gas supply pressure used in design, unit is kilopascal (kPa); P _m -measured relative static pressure of gas in the gas flow meter, unit is thousand Pa (kPa); t _g -the measured gas temperature in the gas flow meter, in degrees Celsius (° C); S-saturated water vapor pressure at temperature tg, in kilopascals (kPa) (when using dry gas When measuring with a flow meter, the S value should be multiplied by the relative humidity of the test gas to be corrected); 0.622-the relative density of the ideal gas of water vapor.

By deriving the above formula, when a gas heating device has the same gas composition, gas pressure, and gas valve opening, the relationship between the gas temperature and atmospheric pressure changes on the gas flow and heat load They are represented by the following formulas (3) and (4):

Where: v ₁ and v ₂ -the gas flow rate in state 1 and state 2, respectively, m ³ / h; T ₁ and T ₂ -the gas temperature in state 1 and state 2, respectively, K; P _amb1 And P _amb2 -atmospheric pressures in states 1 and 2, respectively, kPa;

s ₁ and s ₂ -are the saturated water vapor pressures corresponding to the corresponding gas temperatures in states 1 and 2, respectively, kPa.

In the formula: Φ ₁ and Φ ₂ -are the heat load in state 1 and state 2, respectively; T ₁ and T ₂ -are the gas temperature in state 1 and state 2, respectively, K; p _amb1 and p _amb2 -respectively Atmospheric pressures in states 1 and 2, kPa; s ₁ and s ₂ -are the saturated water vapor pressures, kPa, corresponding to the corresponding gas temperatures in states 1 and 2, respectively.

In addition, according to fluid mechanics and Bernoulli's equation, the following formula (5) can be obtained:

In the formula: P is the gas pressure; ρ is the gas density; V is the gas flow rate; C is the Bernoulli constant.

Combining the above formulas (3) to (5), the following formula (6) can be obtained:

In the formula: P ₁ and P ₂ -are the gas output pressures in state 1 and state 2, respectively, kPa; T ₁ and T ₂ -are the gas temperature (K) in state 1 and state 2, respectively. Gas is usually supplied by pipes or bottles, so the gas temperature is only approximately the ambient temperature; p _am1 and p _amb2 -are the atmospheric pressures in state 1 and state 2, respectively, kPa; s ₁ and s ₂ -are state 1 respectively Saturated water vapor pressure corresponding to the corresponding gas temperature in state 2, kPa; C ₁ and C ₂ -are Bernoulli constants of the corresponding gas in state 1 and state 2, respectively.

It can be known from the above formula (4) that when any one of the gas temperature T (approximately the ambient temperature), the atmospheric pressure P _amb and the saturated water vapor pressure changes, the thermal load of the gas heating device will change. For example, when the cooking system is located in different geographical locations, the output of its firepower may vary due to different atmospheric pressure and ambient temperature; and even for a cooking system with a certain location, its working environment may also vary Changes due to climate change and / or other reasons, for example, when the cooking system is operated for a certain period of time, its ambient temperature may be higher than the ambient temperature at the beginning of operation. This is because the cooking system will release to the surrounding environment during operation. For the sake of heat.

Therefore, in order to ensure the constant heat load output, the gas pressure P should be changed accordingly. Let the ambient temperature T ₂ , the atmospheric pressure P _amb2 , and the gas pressure P ₂ be known values in one state, and measure the ambient temperature T ₁ and the atmospheric pressure P _{amb1 in} another state, while introducing reactions such as gas The correction factor K, which is affected by other factors such as Huabai number, can be derived from formula (6):

In the formula, p ₁ 'should be the adjusted gas pressure value.

When the values of C ₁ and C ₂ in formula (7) are 0, the following formula (8) can be obtained:

The gas-fired cooking system of the present invention, especially a semi-automatic or automatic gas-fired cooking system, uses a standardized cooking program for cooking, wherein a standardized fire power intensity (fire power range) and heating time are set in the cooking program to obtain quality Qualified and stable dishes and other cooking foods. Therefore, for the gas-fired cooking system of the present invention, especially the semi-automatic or automatic gas-fired cooking system, the initial firepower calibration is performed in the initial calibration environment, so that each firepower gear has a standardized firepower intensity, and the initial calibration environment is obtained. Lower the gas pressure corresponding to each fire position. That is, for the gas-fired cooking system of the present invention, especially the semi-automatic or automatic gas-fired cooking system, the ambient temperature T ₂ , the atmospheric pressure P _amb2 , and the gas pressure P corresponding to each thermal load in the initial calibration environment. ₂ and the saturated water vapor pressure s ₂ are determined. Therefore, the gas-fired cooking system of the present invention is based on the measured ambient temperature T ₁ and atmospheric pressure P _amb1 under the current working environment, and the saturated water vapor pressure s ₁ under the current working environment, based on the above formula (8) Relationship can automatically determine the target gas pressure required to obtain a thermal load equal to or substantially equal to the initially calibrated thermal load under the current working environment, and can be based on the target gas pressure and the measured gas pressure. As a result of comparison, the gas pressure is automatically controlled or adjusted, so as to achieve stable firepower output under different working environments.

Alternatively, in the present invention, various working environments can be created in the laboratory, and the gas pressure measured when the measured thermal load of the cooking system at each ambient temperature and atmospheric pressure is equal to or substantially equal to the initially calibrated thermal load As the target gas pressure, an ambient temperature and atmospheric pressure-target gas pressure relationship table is obtained.

The gas-fired cooking system of the present invention can perform initial firepower calibration under the initial calibration environment before leaving the factory, or can use the initial firepower calibration under the initial calibration environment at the place of use. When the gas used in the initial calibration has the same Huabai number as the gas used at work, the value of the correction coefficient K can be 1. For example, because the number of white gas used in each region is usually the same, when the initial thermal calibration is performed at the place of use, the value of the correction coefficient K can be 1.

According to a specific embodiment of the present invention, the control processor includes a processing unit and a storage unit. The storage unit stores an environmental temperature, an atmospheric pressure, and a target gas pressure, which indicate a correspondence between the ambient temperature, the atmospheric pressure, and the target gas pressure. Relationship table, the processing unit queries the relationship table based on the measured ambient temperature and atmospheric pressure to obtain the target gas pressure.

In this specific embodiment, various working environments can be created in the laboratory, and the measured gas pressure when the measured thermal load of the cooking system at each ambient temperature and atmospheric pressure is equal to or substantially equal to the initially calibrated thermal load As the target gas pressure, the ambient temperature, atmospheric pressure-target gas pressure relationship table is obtained; or it can be determined according to the above formula (8) that the thermal load equal to or basically equal to the initial calibration is obtained at each predetermined ambient temperature and atmospheric pressure The target gas pressure required for equal thermal load, so as to obtain the relationship table of ambient temperature, atmospheric pressure and target gas pressure. Among them, the ambient temperature and atmospheric pressure-target gas pressure relationship table can be obtained by running the corresponding program of the gas-type cooking system, or it can be input from the outside.

According to another specific embodiment of the present invention, the control processor has an algorithm for determining a target gas pressure according to the measured ambient temperature and atmospheric pressure, and obtains the target gas pressure according to the algorithm.

According to another specific embodiment of the present invention, the control processor is further configured to process the measured ambient temperature to obtain a saturated water vapor pressure, and process the saturated water vapor pressure and the measured ambient temperature and atmospheric pressure. To get the target gas pressure.

In the present invention, the control processor can obtain the saturated water vapor pressure by querying the relationship table between the ambient temperature and the saturated water vapor pressure, and can also perform arithmetic processing on the measured ambient temperature according to the empirical formula of the relationship between the saturated water vapor pressure and the environmental temperature. To get saturated water vapor pressure.

According to another specific embodiment of the present invention, the gas-fired cooking system further includes a gas flow rate detecting unit for measuring a gas flow rate in the gas pipeline, and transmitting the gas flow rate to the control processor based on the measured gas flow rate. Gas flow rate detection signal; the control processor is also used to process the measured gas flow rate and gas pressure to obtain the Bernoulli constant of the gas, and to measure the Bernoulli constant of the gas and the measured environment The temperature and the atmospheric pressure are processed to obtain a corrected target gas pressure, and a gas pressure control signal is output to the gas regulating device based on the measured gas pressure and the corrected target gas pressure.

In the present invention, the Bernoulli constant C of the gas in the corresponding state can be obtained by measuring the gas flow rate and the gas pressure twice or more, and according to the above formula (5).

In the present invention, the corrected target gas pressure can be obtained by the following formula (9):

In the formula: p ₁ ”is the corrected target gas pressure; K is the correction coefficient; P ₂ is the gas pressure in the initial calibration environment; T ₁ and T ₂ are the measured ambient temperature and the initial calibration environment, respectively Ambient temperature; P _amb1 and P _amb2 are the measured atmospheric pressure and the atmospheric pressure in the initial calibration environment; s ₁ and s ₂ are the saturated water vapor pressure in the current working environment and the initial calibration environment; C ₁ and C ₂ is the Bernoulli constant of the gas in the gas pipeline under the current working environment and the initial calibration environment, respectively.

It can be seen from the above technical solutions that by correcting the target gas pressure, the gas-fired cooking system of the present invention can more accurately control and adjust its firepower intensity. In addition, considering that the Bernoulli constant C of the gas changes dynamically when the cooking system is operating, the correction of the target gas pressure may also be performed dynamically.

According to another specific embodiment of the present invention, the gas cooking system further includes a gas flow detection unit for measuring a gas flow in the gas pipeline, and transmitting the gas to the control processor based on the measured gas flow. The gas flow detection signal; the control processor is further configured to obtain a target gas flow according to a conversion formula or a table, and output a gas flow control signal to the gas regulating device based on the measured gas flow and the target gas flow. Among them, the gas flow rate can be directly measured or indirectly measured by measuring the gas flow rate and converting the gas flow rate into a gas flow rate.

In the above technical solution, the control processor may obtain the target gas required when the thermal load of the gas cooking system in each working environment is equal to or substantially equal to the initial calibration thermal load by calculating the following conversion formula (10): flow:

In the formula: Φ- initial calibration heat load, kW; Q ₁ -0 ℃, low heat value of gas at 101.3kPa, MJ / m ³ ; V- target gas flow, m ³ / h; t _g -current work Measured ambient temperature in the environment, ℃; P _amb -Atmospheric pressure measured in the current working environment, kPa; P _m -Measured relative static pressure of the gas in the gas flow meter, kPa; S-temperature is t Saturated water vapor pressure at _g , kPa (when measured with a dry gas flow meter, the S value should be multiplied by the relative humidity of the gas for correction).

Alternatively, a conversion table indicating the correspondence between the relative static pressure of the gas, the ambient temperature, and the atmospheric pressure and the target gas flow at each firepower intensity may be obtained in advance according to the above formula (10), and the control processor may query the conversion table to obtain Get the target gas flow.

The control of the fire power intensity by adjusting the gas pressure has the advantage of fast speed, which is especially suitable for the requirements of the gas-fired cooking system to quickly adjust the fire power intensity. The control of the firepower intensity by adjusting the gas flow has the advantage of higher control accuracy, but it requires a longer adjustment time. In the above technical solution, adjusting the gas pressure and the gas flow to control the fire strength simultaneously has the significant advantages of fast adjustment speed and high accuracy.

According to another specific embodiment of the present invention, the environmental parameter detection unit includes an environmental temperature detection unit and an atmospheric pressure detection unit. The environmental temperature detection unit is configured to measure the ambient temperature and generate an ambient temperature detection signal based on the measured ambient temperature. The atmospheric pressure The detection unit is configured to measure the atmospheric pressure and generate an atmospheric pressure detection signal based on the measured atmospheric pressure.

According to another specific embodiment of the present invention, the environmental parameter detection unit includes an environmental temperature and atmospheric pressure detection unit, which is configured to measure the environmental temperature and the atmospheric pressure and generate an environmental temperature detection signal and a temperature based on the measured environmental temperature and atmospheric pressure, respectively. Atmospheric pressure detection signal. This is to consider that when the atmospheric pressure detection unit measures the atmospheric pressure, it needs to measure the ambient temperature to automatically correct the static drift of the sensor; and, compared with the simultaneous use of the ambient temperature detection unit and the atmospheric pressure detection unit, the use of the ambient temperature and The cost of the atmospheric pressure detection unit is lower.

According to another specific embodiment of the present invention, the gas regulating device includes a gas regulating valve that is directly and / or indirectly driven by a motor and / or an electric signal and / or other driving device to perform multi-stage and / or stepless continuous regulation. .

According to another specific embodiment of the present invention, the environment parameter detection unit and the control processor, the gas pressure detection unit and the control processor, and the control processor and the gas regulating device may be wired or wireless. Perform signal transmission.

According to another embodiment of the present invention, the gas pressure detection unit includes a pressure sensor, such as a differential pressure sensor, which is disposed on a gas pipe between the gas regulating device and the gas nozzle. . Another implementation manner is that a gas detection bypass is provided on the gas pipeline, and a pressure sensor is provided on the gas detection bypass.

According to another embodiment of the present invention, the gas cooking system is an automatic or semi-automatic gas cooking system.

On the other hand, in order to achieve the object of the present invention, the present invention provides such an automatic fire power calibration method for a gas-fired cooking system including a gas regulating device and a gas heating device. The regulating device is used at least to regulate the gas pressure in the gas heating device. The automatic firepower calibration method includes the following steps: (1) initial calibration of each firepower intensity of the gas-fired cooking system under the initial calibration environment; (2) determining that the initial calibration must be achieved at each predetermined ambient temperature and atmospheric pressure The target gas pressure required for each firepower intensity to obtain the ambient temperature, atmospheric pressure-target gas pressure relationship table; (3) measure the fuel gas located downstream of the gas regulating device in the gas flow direction under the current working environment Gas pressure in the gas pipeline; (4) Measure the ambient temperature and atmospheric pressure of the gas cooking system under the current working environment; (5) Query the relationship table of ambient temperature, atmospheric pressure-target gas pressure to get the current work Under the environment, the target gas pressure required to reach the initial calibrated firepower intensity; (6) Control or adjust the gas pressure according to the result of comparison between the measured gas pressure and the target gas pressure.

Before or during cooking, the gas-fired cooking system of the present invention can query the relationship table of ambient temperature, atmospheric pressure, and target gas pressure according to the measured ambient temperature T ₁ and atmospheric pressure P _amb1 under the current working environment. The target gas pressure is obtained, and the gas pressure is automatically controlled or adjusted according to the comparison result between the target gas pressure and the measured gas pressure, so as to achieve a stable firepower output in different working environments.

In the present invention, the saturated water vapor pressure can be obtained by querying the relationship table between the ambient temperature and the saturated water vapor pressure, or the measured environmental temperature can be calculated and processed according to the empirical formula of the relationship between the saturated water vapor pressure and the environmental temperature to obtain saturation. Water vapor pressure.

According to a specific embodiment of the present invention, the automatic firepower calibration method further includes correcting the target gas pressure after step (6), and comparing the measured gas pressure with the corrected target gas pressure. As a result, a step of further controlling or adjusting the gas pressure; wherein a corrected target gas pressure is obtained in accordance with the functional relationship represented by the above formula (9).

According to another specific embodiment of the present invention, the automatic fire power calibration method of the present invention further includes the following steps: determining a target gas flow rate required to achieve the initial fire power intensity under the current working environment by converting a formula or a table; measuring Gas flow rate in the current working environment; control or adjust the gas flow rate based on the comparison of the measured gas flow rate with the target gas flow rate. Among them, the gas flow rate can be directly measured or indirectly measured by measuring the gas flow rate and converting the gas flow rate into a gas flow rate.

In the above technical solution, the target gas flow rate required when the thermal load of the gas cooking system in each working environment is equal to or substantially equal to the initially calibrated thermal load may be obtained by calculating the conversion formula (10).

Alternatively, a conversion table representing the correspondence between the relative static pressure of the gas, the ambient temperature, and the atmospheric pressure and the target gas flow at each firepower intensity can be obtained in advance according to the above formula (10), and the target can be obtained by querying the conversion table Gas flow.

The control of the fire power intensity by adjusting the gas pressure has the advantage of fast speed, which is especially suitable for the requirements of the gas-fired cooking system to quickly adjust the fire power intensity. And by regulating the gas Flow rate and fire strength control has the advantage of higher control accuracy, but it requires longer adjustment time. In the above technical solution, adjusting the gas pressure and the gas flow to control the fire strength simultaneously has the significant advantages of fast adjustment speed and high accuracy.

In yet another aspect, in order to achieve the purpose of the present invention, the present invention also provides such an automatic fire power calibration method for a gas cooking system, the gas cooking system includes a gas regulating device and a gas heating device. The gas regulating device is used to regulate the gas pressure in the gas heating device. The automatic firepower calibration method includes the following steps: (1) initial calibration of each firepower intensity of the gas-fired cooking system under the initial calibration environment; (2) measuring the location of the gas in the gas flow direction in the current working environment Adjust the gas pressure in the gas pipeline downstream of the device; (3) measure the ambient temperature and atmospheric pressure of the gas cooking system under the current working environment; (4) perform arithmetic processing on the measured ambient temperature and atmospheric pressure to Determine the target gas pressure required to achieve the initial calibrated firepower intensity under the current working environment; (5) Control or adjust the gas pressure based on the comparison of the measured gas pressure with the target gas pressure .

According to a specific embodiment of the present invention, the automatic fire power calibration method further includes correcting the target gas pressure after step (5), and comparing the measured gas pressure with the corrected target gas pressure. As a result, a step of further controlling or adjusting the gas pressure; wherein a corrected target gas pressure is obtained in accordance with the functional relationship represented by the above formula (9).

The gas cooking system of the present invention can dynamically and automatically calibrate the firepower intensity according to the change of its working environment, so as to output the same or approximately the same heat load as the initial calibration value under various working environments, thereby achieving a stable output of the firepower. Therefore, the gas-fired cooking system of the present invention can achieve precise control of the cooking temperature, and cook dishes and other cooked foods with stable quality.

The automatic firepower calibration method of the present invention can dynamically and automatically calibrate the firepower intensity of the gas-fired cooking system according to changes in the working environment of the gas-fired cooking system, so that the gas-fired cooking system outputs the same or approximately the same value as the initial calibration value under various working environments Thermal load to achieve stable output of firepower. Therefore, after adopting the automatic fire power calibration method of the present invention, the gas-fired cooking system can achieve precise control of the cooking atmosphere, thereby cooking dishes and other cooking foods with stable quality.

In order to clarify the object, technical solution and advantages of the present invention more clearly, the present invention is further described in detail below with reference to the drawings and specific embodiments. In each drawing, the same element symbol has the same meaning.

1‧‧‧Gas pressure detection unit

2‧‧‧ Atmospheric Pressure Detection Unit

23‧‧‧Ambient temperature and atmospheric pressure detection unit

3‧‧‧Ambient temperature detection unit

4‧‧‧ Control Processor

41‧‧‧Storage unit

42‧‧‧processing unit

5‧‧‧Gas regulating device

6‧‧‧Gas heating device

7‧‧‧Gas pipeline

8‧‧‧Gas flow meter

9‧‧‧Gas flow rate detection unit

[Fig. 1] Fig. 1 is a block diagram showing a structure of a gas cooking system according to a first embodiment of the present invention.

[Fig. 2] Fig. 2 is a flow chart of automatic fire calibration of Embodiment 1 of the gas cooking system of the present invention.

[Fig. 3] It is the fire of Embodiment 1 of the gas-fired cooking system of the present invention based on the corrected target gas pressure.

Flow chart of force strength correction. [Fig. 4] It is based on the target gas flow rate to improve the firepower intensity of Embodiment 1 of the gas cooking system of the present invention.

Flow chart for calibration. 5 is a block diagram showing a structure of a gas cooking system according to a second embodiment of the present invention.

[Fig. 6] Fig. 6 is a flowchart of automatic fire calibration of Embodiment 2 of the gas cooking system of the present invention.

Example 1

FIG. 1 is a block diagram showing the structure of a gas cooking system according to a first embodiment of the present invention with an automatic fire calibration function. Among them, 1 is a gas pressure detection unit, 2 is an atmospheric pressure detection unit, 3 is an ambient temperature detection unit, 4 is a control processor, 41 is a storage unit, 42 is a processing unit, 5 is a gas regulating device, and 6 is a fuel gas For gas heating devices, 7 is a gas pipeline, 8 is a gas flow meter, and 9 is a gas flow rate detection unit.

The gas pressure detection unit 1 includes a gas pressure sensor and a gas pressure detection and conversion circuit. The atmospheric pressure detection unit 2 includes an atmospheric pressure sensor and an atmospheric pressure detection and conversion circuit. The ambient temperature detection unit 3 includes an ambient temperature sensor. The detector and the ambient temperature detection and conversion circuit. The gas regulating device 5 includes a proportional valve and a valve driving mechanism. The gas flow rate detection unit 9 includes a gas flow rate sensor and a gas flow rate detection and conversion circuit. Among them, the ambient temperature sensor and the atmospheric pressure sensor are installed on the outer shell of the cooking system, which is easy to contact the environment and avoid the interference of heat sources as much as possible; the gas pressure sensor is installed on the proportional valve and the gas heating device. On the gas pipeline between the gas nozzles; the gas flow rate sensor is installed on the gas pipeline between the gas flow meter 8 and the proportional valve; gas pressure detection and conversion circuit, atmospheric pressure detection and conversion circuit, ambient temperature The detection and conversion circuit and the gas flow rate detection and conversion circuit are integrated on a control circuit board of the control processor 4.

As shown in Figure 1, the gas pressure detection unit 1 is used to measure the gas pressure in the gas pipeline between the proportional valve and the gas nozzle, and generate a gas pressure detection signal based on the measured gas pressure; atmospheric pressure The detection unit 2 is configured to measure the atmospheric pressure and generate an atmospheric pressure detection signal based on the measured atmospheric pressure; the ambient temperature detection unit 3 is configured to measure the ambient temperature and generates an environmental temperature detection signal based on the measured ambient temperature; gas The flow velocity detection unit 9 is used to measure the gas flow velocity in the gas pipeline between the proportional valve and the gas flow meter 8, and generates a gas flow velocity detection based on the measured gas flow velocity signal. The gas pressure detection signal, the atmospheric pressure detection signal, the ambient temperature detection signal and the gas flow velocity detection signal are input and stored in the storage unit 41; at the same time, the storage unit 41 also stores information indicating the ambient temperature and atmospheric pressure under each thermal load. Corresponding relationship between target gas pressure, ambient temperature, atmospheric pressure-target gas pressure relationship table, environment temperature and saturated water vapor pressure relationship table, and cooking program and other data. The processing unit 42 reads the corresponding data in the storage unit 41 and outputs the gas pressure and gas flow control signals to the gas regulating device 5 as required.

In this embodiment, there is a functional relationship between the target gas pressure and the ambient temperature and atmospheric pressure as shown in the following formula (8):

In the formula: p ₁ ′ is the target gas pressure, kPa; K is a correction coefficient, which is used to modify the influence of other factors such as the number of white gas on the target gas pressure; P ₂ is the gas pressure in the initial calibration environment , KPa; T ₁ and T ₂ -are the ambient temperature in the predetermined working environment and the initial calibration environment, K; P _amb1 and P _amb2 -are the atmospheric pressure in the predetermined working environment and the initial calibration environment, kPa; s ₁ and s ₂ -are the saturated water vapor pressures corresponding to the predetermined working ambient temperature and the initial calibration ambient temperature, respectively, kPa. The saturated water vapor pressure is obtained by querying the relationship table between the ambient temperature and the saturated water vapor pressure.

For the gas cooking system of the present invention, the initial calibration environment and the gas pressure corresponding to each initial calibration heat load are uniquely determined. According to the above formula (8), it can be calculated that it is to be obtained under a predetermined working environment. The target gas pressure required for the thermal load that is equal to or substantially equal to the initially calibrated thermal load, and then the relationship between the ambient temperature, the atmospheric pressure, and the target gas pressure is shown, which represents the correspondence between the ambient temperature and the atmospheric pressure and the target gas pressure. table.

FIG. 2 is a flow chart of automatic thermal power calibration of the gas cooking system of this embodiment. As shown in Figure 2, first, the initial firepower calibration of the cooking system is performed in the initial calibration environment, and according to the above formula (8), the required firepower intensity to achieve the initial calibration at each predetermined ambient temperature and atmospheric pressure is determined. The target gas pressure is used to obtain an ambient temperature, atmospheric pressure-target gas pressure relationship table and store it in the storage unit 41. Before or during cooking, the cooking system is automatically calibrated to achieve a stable firepower output. To this end, the atmospheric pressure detection unit 2 measures the current atmospheric pressure, the ambient temperature detection unit 3 measures the current ambient temperature, and the gas pressure detection unit. 1 The measured current gas pressure; the control processor 4 determines the same or closest atmospheric pressure and ambient temperature as the measured atmospheric pressure and ambient temperature by querying the ambient temperature, atmospheric pressure-target gas pressure relationship table, thereby obtaining Compare the corresponding target gas pressure with the actual gas pressure measured by the gas pressure detection unit 1. If there is no deviation in the comparison result, or although there is a deviation, the deviation is within the allowable range. If there is no obvious or unacceptable impact on the quality of the dishes, no adjustment is necessary. The allowable deviation outputs a gas pressure control signal to the gas regulating device 5; the gas regulating device 5 automatically adjusts the opening degree of the proportional valve according to the control signal, so that the gas pressure reaches or approaches the target gas pressure.

Further, as shown in FIG. 3, after the automatic thermal power calibration is completed, the control processor 4 further corrects the target gas pressure to obtain a corrected target gas pressure, and according to the corrected target gas pressure and gas pressure, The comparison result of the actual measured gas pressure by the detection unit 1 outputs a gas pressure control signal to the gas regulating device 5; the gas regulating device 5 automatically adjusts the opening degree of the proportional valve according to the control signal, so that the gas pressure reaches or Near the target gas pressure after calibration.

Among them, the control processor 4 has a corresponding software program or a logic operation circuit to obtain a corrected target gas pressure according to an algorithm represented by the following formula (9):

In the formula: p ₁ ”is the corrected target gas pressure; K is a correction factor used to modify the influence of other factors such as gas white number on the target gas pressure; P ₂ is the gas pressure in the initial calibration environment Force; T ₁ and T ₂ are the measured ambient temperature and the ambient temperature in the initial calibration environment; P _amb1 and P _amb2 are the measured atmospheric pressure and the atmospheric pressure in the initial calibration environment; s ₁ and s ₂ is the saturated water vapor pressure in the current working environment and the initial calibration environment; C ₁ and C ₂ are the Bernoulli constants of the gas in the gas pipeline under the current working environment and the initial calibration environment, respectively. The measured gas flow rate and gas pressure are obtained by processing.

At the same time, the gas cooking system of this embodiment also controls its firepower intensity by adjusting the gas flow rate to achieve a stable firepower output. And, the adjustment of the gas flow rate is usually performed after the adjustment of the gas pressure. In order to adjust the gas flow rate, as shown in FIG. 4, first, the control processor 4 obtains the target gas flow rate, and measures the fuel gas measured by the gas flow rate detection unit 9 (also serves as the gas flow rate detection unit at this time). The gas flow rate is processed to obtain the actual gas flow rate; then, the control processor 4 outputs a gas pressure control signal to the gas regulation device 5 according to a comparison result between the target gas flow rate and the actual gas flow rate. The opening degree of the proportional valve is automatically adjusted according to the control signal, so that the gas flow rate reaches or approaches the target gas flow rate.

Among them, the control processor 4 has a corresponding software program or a logic operation circuit to obtain the target gas flow rate according to the algorithm represented by the following formula (10):

In the formula: Φ- initial calibration heat load, kW; Q ₁ -0 ℃, low heat value of gas at 101.3kPa, MJ / m ³ ; V- target gas flow, m ³ / h; t _g -current work Ambient temperature measured in the environment, ℃; P _amb -Atmospheric pressure measured in the current working environment, kPa; P _m -Measured relative static pressure of the gas in the gas flow meter, kPa; S- temperature is t Saturated water vapor pressure at _g , kPa (when measured with a dry gas flow meter, the S value should be multiplied by the relative humidity of the gas for correction).

The thermal load of the gas cooking system of this embodiment was measured under a variety of working environments different from the initial calibration environment. The results show that the measured thermal load and initial calibration heat load of each firepower gear unit under these working environments The deviation between them is less than 0.02kW.

Example 2

FIG. 5 is a block diagram showing the structure of a gas cooking system according to a second embodiment of the present invention with an automatic fire calibration function. Among them, 1 is a gas pressure detection unit, 23 is an ambient temperature and atmospheric pressure detection unit, 4 is a control processor, 5 is a gas conditioning device, 6 is a gas heating device, 7 is a gas pipeline, and 8 is a gas Flow meter, 9 indicates gas flow rate detection unit.

The gas pressure detection unit 1 includes an integrated gas pressure sensor and a gas pressure detection and conversion circuit, and the ambient temperature and atmospheric pressure detection unit 23 includes an integrated ambient temperature and atmospheric pressure sensor and a corresponding Detection and conversion circuit. The ambient temperature detection unit 3 includes an integrated ambient temperature sensor and ambient temperature detection and conversion circuit. The gas regulating device 5 includes a proportional valve and a valve driving mechanism. The gas flow rate detection unit 9 includes an integrated Integrated gas flow rate sensor and gas flow rate detection and conversion circuit. Among them, the ambient temperature and atmospheric pressure detection unit 23 is installed on the outer casing of the cooking system; the gas pressure detection unit 1 is installed on the gas pipe 7 between the proportional valve and the gas nozzle of the gas heating device; the gas flow rate The sensor is installed on the gas pipeline between the gas flow meter 8 and the proportional valve; The gas pressure detection unit 1, the ambient temperature and atmospheric pressure detection unit 23, the gas regulating device 5 and the gas flow rate detection unit 9 and the control processor 4 respectively perform signal transmission by wireless means.

As shown in FIG. 5, the gas pressure detection unit 1 is configured to measure a gas pressure in a gas pipeline between a proportional valve and a gas nozzle, and generate a gas pressure detection signal based on the measured gas pressure; an ambient temperature And atmospheric pressure detection unit 23 are used to measure the ambient temperature and atmospheric pressure, and generate an ambient temperature detection signal and an atmospheric pressure detection signal based on the measured ambient temperature and atmospheric pressure; the gas flow rate detection unit 9 is used to measure the proportional valve and The gas flow rate in the gas pipeline between the gas flow meters 8 generates a gas flow rate detection signal based on the measured gas flow rate. The control processor 4 performs arithmetic processing on the measured atmospheric pressure and ambient temperature to obtain a target gas pressure, and outputs a gas pressure adjustment signal to the gas regulating device 5 as required.

In this embodiment, the control processor 4 has a corresponding software program or a logic operation circuit to determine the target gas pressure according to the algorithm represented by the following formula (8):

In the formula, p ₁ ′ is the target gas pressure, kPa; K is a correction coefficient, which is used to modify the influence of other factors such as the number of white gas on the target gas pressure; P ₂ is the gas pressure in the initial calibration environment , KPa; T ₁ and T ₂ -are the measured ambient temperature and the ambient temperature in the initial calibration environment, K; P _amb1 and P _amb2 -are the measured atmospheric pressure and the atmospheric pressure in the initial calibration environment, respectively , KPa; s ₁ and s ₂ -are the saturated water vapor pressures, kPa, corresponding to the measured ambient temperature and the initial calibrated ambient temperature, respectively. The saturated water vapor pressure is obtained by querying the relationship table between the ambient temperature and the saturated water vapor pressure.

For the gas-fired cooking system of the present invention, its initial calibration environment and the gas pressure corresponding to each initial calibration heat load are uniquely determined. According to the above formula (8), it can be calculated that it will be obtained under the current working environment. The target gas pressure required for a thermal load equal to or substantially equal to the initially calibrated thermal load.

FIG. 6 is an automatic thermal power calibration flowchart of the gas cooking system of this embodiment. As shown in FIG. 6, first, an initial firepower calibration is performed on the cooking system in an initial calibration environment. Before or during cooking, the cooking system is automatically calibrated to achieve a stable firepower output. To this end, the gas pressure detection unit 1 measures the current gas pressure, and the ambient temperature and atmospheric pressure detection unit 23 measures the current ambient temperature and Atmospheric pressure; the control processor 4 obtains the current saturated water vapor pressure by querying the relationship table between the ambient temperature and the saturated water vapor pressure, and calculates the measured ambient temperature and atmospheric pressure according to the algorithm represented by the above formula (8) Processing to obtain the target gas pressure corresponding to the current working environment, and compare the target gas pressure with the gas pressure measured by the gas pressure detection unit 1, if there is no deviation in the comparison result, or although there is a deviation, but If the deviation is within the allowable range, no adjustment is necessary. If there is an unallowable deviation in the comparison result, the gas pressure control signal is output to the gas regulator 5; the gas regulator 5 automatically adjusts the proportion according to the control signal The opening degree of the valve, so that the gas pressure reaches or approaches the target gas pressure.

In this embodiment, the same as in Embodiment 1, after the automatic thermal power calibration is completed, the target gas pressure is also corrected to obtain a corrected target gas pressure, and the corrected target gas pressure is compared with the actual measured gas pressure. The comparison result of gas pressure controls or adjusts the gas pressure. In addition, similarly to the first embodiment, the gas-fired cooking system of the present embodiment also controls its firepower intensity by adjusting the gas flow rate to achieve a stable firepower output.

The thermal load of the gas cooking system of this embodiment was measured under a variety of working environments different from the initial calibration environment. The results show that the measured thermal load and initial calibration heat load of each firepower gear unit under these working environments The deviation between them is less than 0.02kW.

Comparative example

As a comparative example, a gas-fired cooking system without an automatic firepower calibration function is shown in Tables 1 and 2 below. The gas-fired cooking system has different firepower in two working environments that are different from the initial calibration environment. The measured thermal load of the gear unit and its deviation from the initial calibrated thermal load.

From the measured data in Tables 1 and 2 above, it can be seen that even in a working environment that is not significantly different from the initial calibration environment, the deviation between the measured thermal load and the initial calibrated thermal load of the comparative gas cooking system is extremely large. In most cases, it will also be greater than 0.02kW, and the deviation between the measured thermal load and the initial calibration heat load increases with the gap between the working environment and the initial calibration environment, which will seriously affect the dishes and other cooked foods. Quality and consistency. In contrast, in the gas-fired cooking system with automatic fire power calibration function of the present invention, the deviation between the measured heat load of each fire power gear unit and the heat load of the initial calibration under the two working environments is less than 0.02 kW.

It should be noted that various aspects of the embodiments described above may be combined and / or replaced with each other, unless there is a mutually exclusive situation between such combinations and / or replacements.

Although the present invention has been described above through the embodiments, it should be understood that those skilled in the art without departing from the scope of the present invention and making equivalent improvements in accordance with the present invention should be covered by the scope of the present invention.

1‧‧‧Gas pressure detection unit

2‧‧‧ Atmospheric Pressure Detection Unit

3‧‧‧Ambient temperature detection unit

4‧‧‧ Control Processor

41‧‧‧Storage unit

42‧‧‧processing unit

5‧‧‧Gas regulating device

6‧‧‧Gas heating device

7‧‧‧Gas pipeline

8‧‧‧Gas flow meter

9‧‧‧Gas flow rate detection unit

Claims (14)

A gas cooking system with an automatic fire power calibration function, comprising a gas regulating device and a gas heating device. The gas regulating device is at least used to regulate the gas pressure in the gas heating device. Cooking system further includes: a gas pressure detection unit for measuring a gas pressure in a gas pipeline downstream of the gas regulating device in a gas flow direction, and generating a gas pressure based on the measured gas pressure A detection signal; an environmental parameter detection unit for measuring ambient temperature and atmospheric pressure, and generating an ambient temperature detection signal and an atmospheric pressure detection signal based on the measured ambient temperature and atmospheric pressure; and a control processor for receiving the combustion signal An air pressure detection signal, the ambient temperature detection signal, and the atmospheric pressure detection signal, and process the measured ambient temperature and atmospheric pressure to obtain a target gas pressure, and based on the measured gas pressure and the target gas pressure The gas pressure outputs a gas pressure control signal to the gas regulating device; the control processor responds to the measured Ambient temperature and atmospheric pressure arithmetic processing in accordance with the following function to determine the target gas pressure:

Among them, p ₁ ′ is the target gas pressure; K is the correction coefficient; P ₂ is the gas pressure in the initial calibration environment; T ₁ and T ₂ are the measured ambient temperature and the ambient temperature under the initial calibration environment, respectively; P _amb1 and P _amb2 are the measured atmospheric pressure and the atmospheric pressure in the initial calibration environment; s ₁ and s ₂ are the saturated water vapor pressure in the current working environment and the initial calibration environment, respectively. The gas-fired cooking system according to claim 1, wherein the control processor includes a processing unit and a storage unit, and the storage unit stores an environment temperature, atmospheric pressure-target gas pressure relationship table, and the processing unit is based on Query the relationship table between the measured ambient temperature and atmospheric pressure to obtain the target gas pressure. The gas cooking system according to claim 1, wherein the control processor is further configured to process the measured ambient temperature to obtain a saturated water vapor pressure, and the saturated water vapor pressure and the measured The ambient temperature and atmospheric pressure are processed to obtain the target gas pressure. The gas-fired cooking system according to claim 1, further comprising a gas flow rate detection unit for measuring a gas flow rate in a gas pipeline, and providing the gas flow rate to the gas flow rate based on the measured gas flow rate. The control processor transmits a gas flow rate detection signal; the control processor is further configured to process the measured gas flow rate and gas pressure to obtain a Bernoulli constant of the gas, and the Bernoulli constant and the The measured ambient temperature and atmospheric pressure are processed to obtain a corrected target gas pressure, and a gas pressure control signal is output to the gas regulating device based on the measured gas pressure and the corrected target gas pressure. The gas-fired cooking system according to claim 1, further comprising a gas flow detection unit for measuring a gas flow in the gas pipeline, and supplying the gas flow to the gas based on the measured gas flow. The control processor transmits a gas flow detection signal; the control processor is further configured to obtain a target gas flow according to a conversion formula or table, and output to the gas regulating device based on the measured gas flow and the target gas flow Gas flow control signal. The gas cooking system according to claim 1, wherein the environmental parameter detection unit includes an environmental temperature detection unit and an atmospheric pressure detection unit, and the environmental temperature detection unit is configured to measure the ambient temperature and generate the ambient temperature based on the measured ambient temperature. An ambient temperature detection signal. The atmospheric pressure detection unit is configured to measure atmospheric pressure and generate an atmospheric pressure detection signal based on the measured atmospheric pressure. An automatic fire power calibration method for a gas-fired cooking system. The gas-fired cooking system includes a gas regulating device and a gas heating device. The gas regulating device is at least used to regulate the gas pressure in the gas heating device. The automatic firepower calibration method includes the following steps: (1) initial calibration of each firepower intensity of the gas cooking system under an initial calibration environment; (2) determining that the initial calibration is to be achieved at each predetermined ambient temperature and atmospheric pressure The target gas pressure required for each firepower intensity to obtain the ambient temperature, atmospheric pressure-target gas pressure relationship table, the target gas pressure and the predetermined ambient temperature and atmospheric pressure have the following functional relationship:

Among them, p ₁ ′ is the target gas pressure; K is the correction coefficient; P ₂ is the gas pressure in the initial calibration environment; T ₁ and T ₂ are the predetermined ambient temperature and the ambient temperature in the initial calibration environment; P _amb1 and P _amb2 is the predetermined atmospheric pressure and the atmospheric pressure in the initial calibration environment; s ₁ and s ₂ are the saturated water vapor pressure in the predetermined working environment and the initial calibration environment; (3) Measure the gas flow direction under the current working environment. The gas pressure in the gas pipeline located downstream of the gas regulator; (4) Measure the ambient temperature and atmospheric pressure of the gas cooking system under the current working environment; (5) Query the ambient temperature and atmospheric pressure- Target gas pressure relationship table to obtain the target gas pressure required to reach the initial calibrated firepower intensity under the current working environment; and (6) comparing the measured gas pressure with the target gas pressure As a result, the gas pressure is controlled or adjusted. The automatic firepower calibration method according to claim 7, wherein in step (2), the saturated water vapor pressure is obtained by querying a relationship table between the ambient temperature and the saturated water vapor pressure. The automatic fire calibration method according to claim 7, further comprising correcting the target gas pressure after step (6), and comparing the measured gas pressure with the corrected target gas pressure. As a result, a step of controlling or adjusting the gas pressure is further performed, wherein the corrected target gas pressure is obtained according to the following functional relationship:

Among them, P ₁ ”is the corrected target gas pressure; K is the correction coefficient; P ₂ is the gas pressure in the initial calibration environment; T ₁ ′ and T ₂ are the measured ambient temperature and the initial calibration environment, respectively Ambient temperature; P _amb1 ′ and P _amb2 are the measured atmospheric pressure and the atmospheric pressure in the initial calibration environment; s ₁ ′ and s ₂ are the saturated water vapor pressure in the current working environment and the initial calibration environment; C ₁ and C ₂ are the Bernoulli constants of the gas in the gas pipeline under the current working environment and the initial calibration environment, respectively. The automatic firepower calibration method according to claim 7, wherein in step (4), the ambient temperature is measured by an ambient temperature detection unit, and the atmospheric pressure is measured by an atmospheric pressure detection unit. An automatic fire power calibration method for a gas-fired cooking system. The gas-fired cooking system includes a gas regulating device and a gas heating device. The gas regulating device is at least used to regulate the gas pressure in the gas heating device. The automatic firepower calibration method includes the following steps: (1) initial calibration of each firepower intensity of the gas cooking system under an initial calibration environment; (2) determining that the initial calibration is to be achieved at each predetermined ambient temperature and atmospheric pressure The target gas pressure required for each firepower intensity to obtain the ambient temperature, atmospheric pressure-target gas pressure relationship table; (3) measuring the current working environment located downstream of the gas regulating device in the direction of gas flow Gas pressure in the gas pipeline; (4) Measure the ambient temperature and atmospheric pressure of the gas cooking system under the current working environment; (5) Query the relationship table between the ambient temperature, atmospheric pressure and the target gas pressure to get The target gas pressure required to reach the initially calibrated firepower intensity under the current working environment; and (6) based on the measured gas pressure and the target gas As a result of the force comparison, the gas pressure is controlled or adjusted; wherein the gas regulating device is also used to regulate the gas flow in the gas heating device, and the automatic fire calibration method further includes the following steps: Formula or table to determine the target gas flow required to achieve the initial calibrated firepower intensity under the current working environment; Measuring the gas flow rate in the current working environment; and controlling or adjusting the gas flow rate based on a comparison of the measured gas flow rate with the target gas flow rate. An automatic fire power calibration method for a gas-fired cooking system. The gas-fired cooking system includes a gas regulating device and a gas heating device. The gas regulating device is at least used to regulate the gas pressure in the gas heating device. The automatic firepower calibration method includes the following steps: (1) initial calibration of each firepower intensity of the gas-fired cooking system in an initial calibration environment; (2) measuring the current working environment in the direction of gas flow in the fuel gas The gas pressure in the gas pipeline downstream of the gas regulating device; (3) Measure the ambient temperature and atmospheric pressure of the gas cooking system under the current working environment; (4) The measured ambient temperature and atmospheric pressure are as follows The functional relationship is processed to determine the target gas pressure required to achieve the initial calibrated firepower intensity in the current working environment:

Among them, p ₁ ′ is the target gas pressure; K is the correction coefficient; P ₂ is the gas pressure in the initial calibration environment; T ₁ and T ₂ are the measured ambient temperature and the ambient temperature under the initial calibration environment, respectively; P _amb1 and P _amb2 are the measured atmospheric pressure and the atmospheric pressure in the initial calibration environment, respectively; s ₁ and s ₂ are the saturated water vapor pressure in the current working environment and the initial calibration environment, respectively; and according to the measured fuel pressure As a result of comparing the gas pressure with the target gas pressure, the gas pressure is controlled or adjusted. The automatic firepower calibration method according to claim 12, wherein in step (4), the saturated water vapor pressure is obtained by querying a relation table between the ambient temperature and the saturated water vapor pressure. The automatic fire calibration method according to claim 12, further comprising correcting the target gas pressure after step (5), and comparing the measured gas pressure with the corrected target gas pressure. As a result, a step of controlling or adjusting the gas pressure is further performed, wherein the corrected target gas pressure is obtained according to the following functional relationship:

Among them, p ₁ ”is the corrected target gas pressure; K is the correction coefficient; P ₂ is the gas pressure in the initial calibration environment; T ₁ and T ₂ are the measured ambient temperature and the initial calibration environment, respectively. Ambient temperature; P _amb1 and P _amb2 are the measured atmospheric pressure and the atmospheric pressure in the initial calibration environment; s ₁ and s ₂ are the saturated water vapor pressure in the current working environment and the initial calibration environment; C ₁ and C ₂ is the Bernoulli constant of the gas in the gas pipeline under the current working environment and the initial calibration environment.