CN106287846A - Gas-cooker and control method thereof - Google Patents

Abstract

A kind of gas-cooker (1) and control method thereof, described gas-cooker (1) including: at least one burner (9), at least one for providing the Gas Pipe of combustion gas to described burner (9), at least one gas valve (6) being used for regulating the gas flow supplying described burner (9), for inputting the user interface (8) of the watt level of described burner (9) for user, described gas-cooker (1) also includes detection module (5) and control module (7)；Described detection module (5) is for detecting the gas pressure force value in described Gas Pipe and being transferred to described control module (7)；Described control module (7) is so to control the regulation of described gas valve (6), and it is by carrying out contrasting and control described gas valve (6) adjustment of combustion gas flow by the described gas pressure force value detected and a compression force reference value stored.Thus, the invention provides a kind of gas-cooker with new control method.

Description

Gas stove and control method thereof

【Technical field】

The present invention relates to a gas stove and its control method, in particular to a gas stove comprising at least one burner, at least one gas pipe for supplying gas to the burner, at least one gas pipe for regulating the gas supplied to the burner A gas valve for the flow rate and a user interface for the user to input the power of the burner, a gas stove and a control method thereof.

【Background technique】

The gas flow adjustment of an existing gas stove is realized by the user directly manually adjusting the gas valve. When the user rotates the knob that can drive the gas valve stem to rotate, the gas flow will change. Another existing gas stove gas flow adjustment is achieved by driving a motor such as a stepping motor. When a user inputs a target power, the motor will drive the gas valve to a corresponding open position.

However, the accuracy of the above two adjustment methods largely depends on the mechanical structure and manufacturing precision of the gas valve itself, which will limit the variety and flexibility of gas flow adjustment.

In addition, when the pressure of the gas source supplied to the gas stove changes, the power corresponding to the gas valve at the same open position is different. Therefore, the user has to observe the situation of the flame and reselect an appropriate opening position for the gas valve.

【Content of invention】

The object of the present invention is to provide a new gas cooker and a new control method of the gas cooker to solve at least one of the above technical problems.

The above object is solved by the following technical solution: a gas stove, comprising: at least one burner, at least one gas pipe for supplying gas to the burner, at least one gas pipe for adjusting the flow of gas supplied to the burner a gas valve and a user interface for users to input the power of the burner, wherein the gas cooker also includes a detection module and a control module; the detection module is used to detect the gas pressure value in the gas pipe and This is transmitted to the control module; the control module controls the adjustment of the gas valve by comparing the detected value of the gas pressure with a stored pressure reference value and controls the adjustment of the gas valve Gas flow, so that the gap between the detected gas pressure value and the pressure reference value is reduced until the detected gas pressure value is equal to the pressure reference value; wherein, the pressure reference value is the same as the user through the user A pressure reference value corresponding to the power input on the interface.

The gas pressure in the gas pipe such as the main gas pipe or the gas distribution pipe will change as the gas valve adjusts the gas flow supplied to the burner. For example, when the gas valve increases the gas flow, the gas pressure in the main gas pipe will decrease. Therefore, the present invention provides a new gas cooker, which includes a detection module for detecting the gas pressure value in the gas pipe, and the adjustment of the gas flow is based on the detected gas pressure value.

The beneficial effect of the invention is that the precise regulation of the gas flow of the gas cooker can be realized by using a common cock valve instead of a gas valve with a complex structure. Therefore, the structural design and manufacturing requirements for the gas valve can be reduced, and the cost of the gas valve can be reduced.

In addition, the gas cooker proposed by the present invention has greater flexibility in gas control. For example, the gas cooker can have different power ranges or different numbers of control gears by modifying the program of the control module. Moreover, the gas flow regulation of the gas cooker is not subject to the influence of the supplied gas pressure.

It should be clearly stated that the gas cooker of the present invention stores several pressure reference values corresponding to different power levels, and these pressure reference values can be obtained through a large number of experiments. Moreover, these pressure reference values can be stored in the control module or other components with storage function. The gas valve of the present invention may be a proportional valve controlled by the control module; or, the gas valve includes a motor, and the motor is controlled by the control module.

The "user interface" in the present invention may be a user operation interface including a touch panel, or may be a mechanical button or knob. The user interface can be located on the gas cooker panel or range hood, or on electronic products such as mobile phones and computers that can remotely control the gas cooker.

The so-called "transmission" includes wired or wireless transmission of data or information. The different "power levels" input by the user through the user interface may be different heating power values or different heating power gears.

"The gas pressure value is equal to the pressure reference value" not only includes the situation that the two are absolutely equal, but also includes the situation that the difference between the two is within an acceptable range in the field of gas stoves or within a certain tolerance range.

In a possible implementation manner of the present invention, the control module pre-stores the relationship between the pressure reference value and the power level, and/or the relationship between the pressure reference value and the gas flow.

Therefore, once the user inputs a power level through the user interface, the control module can directly or indirectly obtain a corresponding pressure reference value through the relationship. In particular, in a possible implementation, the relationship can be expressed in the form of a characteristic curve by analyzing experimental data.

In a possible implementation manner of the present invention, the gas valve has a motor, especially a stepper motor, and the motor is controlled by the control module to adjust the gas flow.

In a possible implementation manner of the present invention, the detection module includes at least one sensor, and the sensor is arranged in a valve body of the gas valve. Therefore, this improvement can increase the degree of integration of components.

In a possible implementation of the present invention, the gas pipe includes a main gas pipe connected to the gas valve and at least two gas distribution pipes installed between the gas valve and the burner; the detection The module includes a sensor, and the sensor is arranged on the main air pipe to detect the gas pressure value in the main air pipe.

The main gas pipe of the present invention is used to transport gas to the gas valve, and the gas is then transported from the gas valve to the burner through the gas distribution pipe. The sensor is only arranged on the main gas pipe to reduce the cost of the gas cooker.

If the sensor is placed in the main gas pipe, when the user changes the gas flow of two burners of a gas stove at the same time, it is very difficult to obtain the contribution of the gas flow change of one burner to the gas pressure change in the main gas pipe. complicated.

To solve this problem, in a possible implementation manner of the present invention, the gas cooker includes two burners and two corresponding gas valves, and the control module is adapted to firstly control the corresponding combustion The power of the device is first adjusted by the gas valve input by the user through the user interface.

Optionally, the gas pipe includes a main gas pipe connected to the gas valve and at least two gas distribution pipes installed between the gas valve and the burner; the detection module includes at least two sensors, The sensors are respectively arranged on the gas distribution pipes to respectively detect gas pressure values in the gas distribution pipes.

The advantage of installing the sensor in the gas distribution pipe is that the control of the gas stove is easier, and the control time of two or more burners can be saved, because the adjustment of the gas valves corresponding to these burners can be performed simultaneously.

Considering that fluctuations in gas pressure in the gas pipe will affect the accuracy of pressure detection, in a possible implementation of the present invention, the gas cooker further includes a pressure stabilizing valve, and the pressure stabilizing valve is located at upstream of the sensor. In other words, the pressure stabilizing valve is located in front of the sensor in the gas flow direction, so the gas pressure has been stabilized before being detected by the sensor.

In a possible implementation manner of the present invention, the gas cooker has an electromagnetic valve, and the electromagnetic valve is arranged on the main air pipe. In case of accidental flameout, the solenoid valve can cut off the gas in the main gas pipe.

In a possible implementation manner of the present invention, the control module is an MCU (microcontroller) or a combinational logic controller, and/or the user interface includes a touch panel.

The advantage of using MCU is that, by modifying the program inside the MCU, the gas cooker can be applied to different kinds of gases such as natural gas or liquefied petroleum gas. In addition, as mentioned before, by modifying the program in the MCU, the gas cooker can have different power ranges or different numbers of control gears. Although the combinatorial logic controller cannot be changed once its design is complete, it is fast and saves adjustment time on gas ranges.

The present invention also provides a method for controlling a gas stove, the gas stove includes at least one burner, at least one gas pipe for supplying gas to the burner, at least one gas valve, a user interface, a detection module and a control module ; Described control method comprises the following steps:

a). The user inputs a power level through the user interface;

b). The detection module detects the gas pressure value in the gas pipe and transmits it to the control module;

c). The control module compares the detected gas pressure value with a stored pressure reference value, wherein the pressure reference value corresponds to the input power;

c1). If the detected gas pressure value is equal to the pressure reference value, the control module stops the adjustment of the gas valve; otherwise

c2). The control module controls the gas valve to adjust the gas flow to narrow the gap between the detected gas pressure value and the pressure reference value, and returns to step b).

The beneficial effect of the above control method is that it is possible to accurately adjust the gas flow of the gas stove even without a gas valve with a complicated structure or high cost. Also, this control method is not affected by pressure variations of the gas supply.

In a possible implementation manner of the present invention, the control module pre-stores a rough adjustment program for each power level, and the coarse adjustment program makes the detected gas pressure value through one adjustment of the gas valve Close to said pressure reference value, said control method comprises an initial step of performing said coarse adjustment procedure, said initial step preceding said step a). The advantage of this embodiment improvement is obvious, that is, the time of the adjustment process can be significantly reduced.

Further, in a possible implementation manner of the present invention, in the step c2), the control module controlling the gas valve to adjust the gas flow is a fine adjustment. Therefore, the combination of the rough adjustment program and the fine adjustment can achieve fast and accurate adjustment of the gas flow of the gas cooker.

In a possible implementation manner of the present invention, the gas pipe includes a main gas pipe connected to the gas valve and at least two gas distribution pipes installed between the gas valve and the burner. Detecting the gas pressure value in the gas pipe in step b) refers to detecting the gas pressure value in the main gas pipe or detecting the gas pressure value in each of the gas distribution pipes.

In a possible implementation manner of the present invention, the gas cooker includes two burners and two corresponding gas valves, and the control method is adapted to be executed preferentially according to the power of the corresponding burners. an adjustment of the gas valve entered by a user through the user interface.

【Description of drawings】

Fig. 1 is a schematic diagram of the gas stove of the present invention.

【detailed description】

Referring now to FIG. 1, a specific embodiment of the present invention will be described in detail as follows.

Fig. 1 is a schematic diagram of the gas stove of the present invention.

As shown in Figure 1, the gas stove 1 includes two burners 9, a main gas pipe 2, each burner 9 corresponds to two gas distribution pipes 10 for supplying gas to the burner 9, and two corresponding gas pipes 10 for regulating A gas valve 6 for supplying gas flow to the burners 9, and a user interface 8 for the user to input the power of each burner 9.

Each gas valve 6 is connected to the main gas pipe 2 and has a stepping motor (not shown), and the gas distribution pipe 10 is installed between the corresponding gas valve 6 and the burner 9 .

The user interface 8 includes a touch panel for the user to input the power level of each burner 9 through the touch panel.

The gas stove 1 also includes a detection module 5 and a control module 7 . Further, the detection module 5 includes a sensor (the sensor is not shown in FIG. 1 ) arranged on the main air pipe 2 to detect the gas pressure in the main air pipe 2 . The control module 7 is an MCU.

Further, in order to stabilize the gas pressure in the main gas pipe 2, a pressure stabilizing valve 4 is located upstream of the sensor in the direction F of gas flow. In addition, the gas stove 1 has a solenoid valve 3 , and the solenoid valve 3 is arranged on the main gas pipe 2 .

The detection module 5 is used to detect the gas pressure value in the main gas pipe 2 and transmit it to the control module 7; the control module 7 controls the adjustment of the gas valve 6 in such a way that it combines the detected gas pressure value with a stored pressure reference value and control the gas valve 6 to adjust the gas flow, so that the gap between the detected gas pressure value and the pressure reference value is narrowed until the detected gas pressure value and the pressure reference value are equal; A pressure reference value corresponding to the power input in the user interface 8 .

In one embodiment, the control module 7 is respectively connected with the detection module 5 , the user interface 8 , the gas valve 6 and the solenoid valve 3 through electric wires (respectively indicated by dotted lines with arrows). Therefore, the detection module 5 can transmit a signal including the detected gas pressure value to the control module 7 through the wire. The control module 7 can control the action of the stepper motor so as to control the gas valve 6 to adjust the gas flow.

In the following content, the control module 7 is adapted to firstly control the adjustment of the gas valve 6 whose power level of the corresponding burner 9 is first input by the user through the user interface 8 .

Please refer to Table 1 below, "left" refers to the burner 9 on the left in FIG. 1 , and "right" refers to the burner 9 on the right in FIG. 1 . "off", "1", "2", and "3" mean that the burner is off, the power level is 1, the power level is 2, and the power level is 3. The pressure reference value is indicated by "R**", for example, "R00" refers to the pressure reference value when both the left burner and the right burner are closed; "R01" refers to the left burner is closed and the right burner The pressure reference value in the 1st gear; "R10" refers to the pressure reference value of the left burner in the 1st gear and the right burner is off; "R11" refers to the pressure reference value of the left and right burners in the 1st gear, so analogy.

Take the user trying to adjust the left burner from 1st gear to 2nd gear while adjusting the right burner from 2nd gear to 3rd gear as an example.

If the user first inputs the target power gear of the left burner through the user interface 8, and then inputs the target power gear of the right burner, the control module 7 first controls the left gas valve for adjusting the gas flow supplied to the left burner 9 6, while keeping the right gas valve 6 constant. The control module 7 compares the detected gas pressure value in the main gas pipe 2 with "R22", and controls the left gas valve 6 to adjust the gas flow, so that the gap between the detected gas pressure value and "R22" is narrowed until the detection The gas pressure value obtained is equal to "R22". Now, the power level of the left burner has been adjusted to 2nd gear. Then, the control module 7 starts to control the adjustment of the right gas valve 6 while keeping the left gas valve 6 unchanged. The control module 7 compares the detected gas pressure value in the main gas pipe 2 with "R23", and controls the right gas valve 6 to adjust the gas flow, so that the gap between the detected gas pressure value and "R23" is narrowed until The detected gas pressure value is equal to "R23". Now, the power of the right burner has been adjusted to 3 levels. Thus, the adjustment of the gas hob ends.

On the contrary, if the user first inputs the target power gear of the right burner, and then inputs the target power gear of the left burner, the control module 7 first controls the adjustment of the right gas valve 6, and at the same time keeps the left gas valve Change. The control module 7 compares the detected gas pressure value in the main gas pipe 2 with "R13", and controls the right gas valve 6 to adjust the gas flow, so that the gap between the detected gas pressure value and "R13" is narrowed until The detected gas pressure value is equal to "R13". Now, the power of the right burner has been adjusted to 3 levels. Then, the control module 7 starts to control the adjustment of the left gas valve 6 while keeping the right gas valve 6 unchanged. The control module 7 compares the detected gas pressure value with "R23", and controls the left gas valve 6 to adjust the gas flow, so that the gap between the detected gas pressure value and "R23" is narrowed until the detected gas pressure The value is equal to "R23". Now, the power level of the left burner has been adjusted to 2 levels. Thus, the adjustment of the gas hob ends.

Table 1

The present invention also provides a control method for the gas stove 1 . This control method comprises the steps:

a). The user inputs a power level through the user interface 8;

b). The detection module 5 detects the gas pressure value in the main air pipe 2 and transmits it to the control module 7;

c). The control module 7 compares the detected gas pressure value with a stored pressure reference value, wherein the pressure reference value corresponds to the input power;

c1). If the detected gas pressure value is equal to the pressure reference value, the control module 7 stops the adjustment of the gas valve 6; otherwise

c2). The control module 7 controls the gas valve 6 to adjust the gas flow to narrow the gap between the detected gas pressure value and the pressure reference value, and returns to step b).

Further, the control module 7 pre-stores a rough adjustment program for each power level, the coarse adjustment program makes the detected gas pressure value close to the pressure reference value through an adjustment of the gas valve, and the control method includes an execution of the rough adjustment program The initial step of , the initial step is before step a).

In addition, in the above step c2), the control module 7 controls the gas valve 6 to adjust the gas flow rate, which is a fine adjustment.

In addition, this control method is suitable for preferentially executing the adjustment of the gas valve 6 whose power level of the corresponding burner 9 is first input by the user through the user interface 8 . The specific example has been mentioned above with reference to Table 1, and will not be repeated here.

The present invention has been described by the above-mentioned related embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention all belong to the scope of patent protection of the present invention.

Claims (15)

1. A gas stove (1), comprising: at least one burner (9), at least one gas pipe for supplying gas to said burner (9), at least one gas valve (6) for regulating the flow of gas supplied to said burner (9), a user interface (8) for the user to input the power level of said burner (9), It is characterized in that, The gas stove (1) also includes a detection module (5) and a control module (7); the detection module (5) is used to detect the gas pressure value in the gas pipe and transmit it to the control module (7 ); the control module (7) controls the adjustment of the gas valve (6) in such a way that it compares the detected gas pressure value with a stored pressure reference value and controls the gas valve (6) ) to adjust the gas flow so that the gap between the detected gas pressure value and the pressure reference value is narrowed until the detected gas pressure value is equal to the pressure reference value; A pressure reference value corresponding to the power input in the user interface (8). 2. The gas stove (1) according to claim 1, characterized in that, the control module (7) pre-stores the relationship between the pressure reference value and the power level, and/or the pressure reference value and the relationship between the gas flow. 3. The gas stove (1) according to claim 1, characterized in that the gas valve (6) has a motor, and the motor is controlled by the control module (7) to adjust the gas flow. 4. The gas stove (1) according to claim 1, characterized in that, the detection module (5) comprises at least one sensor, and the sensor is arranged in the valve body of the gas valve (6). 5. The gas stove (1) according to claim 1, characterized in that, the gas pipe comprises a main gas pipe (2) connected to the gas valve (6) and a main gas pipe (2) installed on the gas valve (6) At least two air distribution pipes (10) between the burner (9); the detection module (5) includes a sensor, and the sensor is arranged on the main air pipe (2) to detect the main air pipe ( 2) The gas pressure value within. 6. The gas stove (1) according to claim 5, characterized in that it comprises two burners (9) and two corresponding gas valves (6), and the control module (7) is suitable for The first step is to control the adjustment of the gas valve (6) that the power of the corresponding burner (9) is first input by the user through the user interface (8). 7. The gas stove (1) according to claim 1, characterized in that, the gas pipe comprises a main gas pipe (2) connected to the gas valve (6) and a main gas pipe (2) installed on the gas valve (6) At least two gas distribution pipes (10) between the burner (9); the detection module (5) includes at least two sensors, and the sensors are respectively arranged on the gas distribution pipes (10) to detect the gas distribution pipes (10) respectively. Describe the gas pressure value in the gas distribution pipe (10). 8. The gas cooker (1) according to any one of claims 5 to 7, characterized in that, the gas cooker (1) further comprises a pressure stabilizing valve (4), and the pressure stabilizing valve (4) Upstream of the sensor in the gas flow direction. 9. The gas stove (1) according to claim 8, characterized in that, the gas stove (1) has a solenoid valve (3), and the solenoid valve (3) is arranged on the main gas pipe (2). 10. The gas stove (1) according to claim 1, characterized in that, the control module (7) is an MCU or a combined logic controller, and/or the user interface (8) includes a touch panel. 11. A method for controlling a gas stove (1), the gas stove comprising at least one burner (9), at least one gas pipe for supplying gas to the burner (9), at least one gas valve (6 ), user interface (8), detection module (5) and control module (7); it is characterized in that, described control method comprises the following steps: a). The user inputs a power level through the user interface (8); b). The detection module (5) detects the gas pressure value in the gas pipe and transmits it to the control module (7); c). The control module compares the detected gas pressure value with a stored pressure reference value, wherein the pressure reference value corresponds to the input power; c1). If the detected gas pressure value is equal to the pressure reference value, the control module (7) stops the regulation of the gas valve (6); otherwise c2). The control module (7) controls the gas valve (6) to adjust the gas flow to narrow the gap between the detected gas pressure value and the pressure reference value, and returns to step b). 12. The control method of the gas stove (1) according to claim 11, the control module (7) pre-stores a rough adjustment program for each power level, and the rough adjustment program is controlled by the gas valve (6) One adjustment makes the detected gas pressure value close to the pressure reference value, characterized in that the control method includes an initial step of executing the rough adjustment procedure, and the initial step is in the step a) Before. 13. The control method of the gas stove (1) according to claim 11 or 12, characterized in that, in the step c2), the control module (7) controls the gas valve (6) to adjust the gas flow is a fine-tuning. 14. The control method of the gas stove (1) as claimed in claim 11, the gas pipe comprises a main gas pipe (2) connected to the gas valve (6) and installed between the gas valve (6) and At least two gas distribution pipes (10) between the burners (9); characterized in that, in the step b), detecting the gas pressure value in the gas pipe refers to detecting the main gas pipe (2) or detect the gas pressure value in each of the gas distribution pipes (10). 15. The control method of the gas stove (1) according to claim 14, characterized in that, the gas stove (1) comprises two said burners (9) and two corresponding said gas valves (6 ), the control method is adapted to give priority to the adjustment of the gas valve (6) in which the power of the corresponding burner (9) is first input by the user through the user interface (8).