CN106765339A - Kitchen range and its control method - Google Patents

Abstract

The invention relates to a cooker and a control method thereof. The cooker (1) comprises: a burner (10); a flame detection device (20), which detects the flame of the burner (10); a gas valve (30), which regulates the flow of gas supplied to the burner (10); The cooker also includes a pressure detection device (40), which detects the pressure of the gas continuously supplied to the burner (10) by the gas valve (30); the control device (50), which is preset with a first pressure threshold; The control device (50) respectively collects the signal of the flame detection device (20) and the pressure signal of the pressure detection device (40), and compares the collected pressure signal with the first pressure threshold, And judging whether the flame of the burner (10) is extinguished according to the collected signal of the flame detection device (20). The control device (50) can make a judgment whether the burner (10) is turned off accidentally.

Description

Cooking range and control method thereof

【Technical field】

The invention relates to the field of cookers, in particular to a cooker with a burner and a control method thereof.

【Background technique】

Many of the existing gas cookers do not have an accidental flameout reminder or alarm function, but the thermocouple is connected to the solenoid valve. Once the flame of the burner is extinguished, the voltage of the thermocouple decreases, and the solenoid valve closes the gas. However, if the solenoid valve fails, there is still a risk of gas leakage; on the other hand, although the gas is closed by the solenoid valve, the user does not get the reminder or alarm that the burner is unexpectedly turned off in time, thinking that the food is always being heated. Waiting until the cooking time you think is over, only to find that the food is not cooked properly, wasting time.

Some current accidental flameout judgments mainly combine two signals: whether the flame is extinguished and whether the gas valve body is in an open position. Only when the flame is extinguished and the valve body is in the open position is it judged to be an accidental flameout. To detect the open position of the gas valve body is to add a mechanism to the valve body. Although these solutions are feasible and economical, they are often limited by space. In the narrow space formed by the valve body, panel and bottom shell , sometimes it is difficult to increase the mechanism to realize the position detection of the valve body.

【Content of invention】

The object of the present invention is to provide an improved cooker and a control method thereof for at least one of the above technical problems.

In order to achieve the above technical purpose, the present invention first proposes the following technical solution: a cooker, comprising: a burner; a flame detection device for detecting the flame of the burner; a gas valve for adjusting the gas supplied to the burner Flow rate; the cooker also includes a pressure detection device, which detects the pressure of the gas continuously supplied to the burner by the gas valve; a control device, preset with a first pressure threshold; the control device respectively collects the flame The signal of the detection device is compared with the pressure signal of the pressure detection device, and the collected pressure signal is compared with the first pressure threshold, and the burner is judged according to the collected signal of the flame detection device Whether the flame of the burner is extinguished; when the collected pressure signal is greater than the first pressure threshold and the flame of the burner is extinguished, the control device judges that the burner is accidentally extinguished.

The present invention proposes a technical solution with a different technical concept to judge the accidental flameout of the burner, instead of starting from the mechanical structure and improving around the gas valve, it uses the detection of gas pressure to judge the accidental flameout of the burner. This makes the implementation of the technical solution of the present invention not limited by the structure of the gas valve itself and the inner space of the cooker where the gas valve is located.

The burners that widely exist on the market currently have an inner ring and an outer ring, and the gas valve is connected to two gas supply pipes, that is, the inner ring air supply pipe and the outer ring air supply pipe that respectively supply gas to the inner ring and the outer ring of the burner. Under normal conditions, from the time the burner is ignited, the inner ring gas supply pipe will continue to supply gas to the burner, and the flame in the inner ring of the burner will always keep burning, but when the flame of the burner is adjusted from the maximum to the minimum, the outer The ring air supply pipe will stop supplying air to the burner, and the flame in the outer ring will be extinguished. Finally, only the inner ring air supply pipe will supply air to the burner, and only the inner ring of the burner will have flame. Therefore, the pressure detection device should be set to detect the pressure of the gas in the inner ring gas supply pipe. Therefore, "the pressure detection device detects the pressure of the gas supplied to the burner by the gas valve", it should be understood that the pressure of the gas supplied to the burner by the gas valve continues throughout the combustion process of the burner. The pressure of the gas is detected by a pressure detection device. For example, for a burner with an inner ring, a middle ring, and an outer ring, the air supply pipes corresponding to the middle ring and the inner ring are continuously supplied with gas during the entire combustion process of the burner, then the pressure detection device can detect whether the middle ring or the outer ring Corresponding gas pressure in the gas supply pipe.

Similarly, "the flame detection device for detecting the flame of the burner" should be understood as detecting the flame of the part that continues to burn during the entire combustion process of the burner. For currently widely available burners on the market, the flame detection device detects the flame of the inner ring of the burner. The flame detection device can be a thermocouple or an ion flame sensor. The signal of the flame detection device is, for example, a voltage signal.

According to a possible implementation manner, the control device is also preset with a second pressure threshold, and the control device also compares the collected pressure signal with the second pressure threshold; when the collected The pressure signal is less than the second pressure threshold, and the flame of the burner is extinguished, and the control device judges that the burner is normally extinguished.

According to a possible implementation manner, the pressure signal is a relative pressure value. The pressure signal is a pressure value expressed with atmospheric pressure as a reference. Of course, in other embodiments, the pressure signal can also be expressed as a voltage signal or a current signal.

According to a possible implementation manner, the first pressure threshold is 500 Pa. The cooker of the present invention is at least suitable for natural gas, liquefied petroleum gas or artificial gas, and the pressure range of the gas used is about 800pa-4000pa. When the collected pressure signal is greater than the first pressure threshold 500pa, and the flame of the burner is extinguished, it means that the pressure detection device detects gas flow, the burner has gas flow out, and the burner has no flame, then the control device can A judgment is made that the burner is accidentally extinguished.

According to a possible implementation manner, the second pressure threshold is 50 Pa. When the collected pressure signal is less than the second pressure threshold 50pa, and the flame of the burner is extinguished, it means that the gas valve is in the normal closed state. Since the injection pipe is connected to the atmosphere, the pressure detected by the pressure detection device is almost Atmospheric pressure, then the control device can make the judgment that the burner is normally extinguished.

According to a possible implementation manner, the control device respectively collects the signal of the flame detection device and the pressure signal of the pressure detection device in real time. Of course, this is only one of the possible embodiments, and those skilled in the art should know that it is also feasible for the control device to collect the signal of the flame detection device in real time, and to collect the pressure signal of the pressure detection device after judging that the flame of the burner is extinguished. of.

According to a possible implementation manner, the cooker includes at least one burner, and at least one gas valve for adjusting the gas flow supplied to each burner is located between one gas valve and one burner. The inner ring gas supply pipe and the outer ring gas supply pipe, the inner ring gas supply pipe and the outer ring gas supply pipe respectively supply gas to the inner ring and the outer ring of the burner, and the pressure detection device is arranged in the inner ring The ring gas supply pipe is used to detect the pressure signal of the gas in the inner ring gas supply pipe; the flame detection device detects the flame of the inner ring of the burner.

According to a possible implementation manner, the pressure detection device is integrated on the gas valve to detect the pressure signal of the gas supplied to the inner ring of the burner; the flame detection device detects the pressure signal of the inner ring of the burner flames.

In order to ensure a stable pressure, the pressure signal detected by the pressure detection device is valid. According to a possible implementation manner, the cooker includes a pressure stabilizing valve, and the pressure stabilizing valve is located on the gas flow direction of the pressure detecting device. upstream. For example, the pressure detection device is arranged at the main trachea.

According to a possible implementation manner, the control device is further configured to control to close the gas valve after it is judged that the burner is unexpectedly extinguished. Although the solenoid valves of most cookers will close the gas after the flame detection device detects that the flame is extinguished, the control device controls the closing of the gas valve, double-layer protection, and improves the safety factor of the cooker.

According to a possible implementation manner, the cooker includes an alarm device, and the control device is further configured to control the alarm device to issue an alarm after determining that the burner is unexpectedly turned off. In this way, the user can close the gas valve or re-ignite in time after receiving the alarm of unexpected flameout, so as to improve the safety of the cooker and know the current state of the cooker in time.

The present invention also proposes the following technical solution: a control method for a cooker, wherein the cooker includes a burner; a flame detection device for detecting the flame of the burner; a gas valve for adjusting the gas supplied to the burner flow rate; a pressure detection device, which detects the pressure of the gas continuously supplied to the burner by the gas valve; a control device; the control method includes the following steps:

a. setting a first pressure threshold in said control device;

b. the control device separately collects the signal of the flame detection device and the pressure signal of the pressure detection device;

c. The control device compares the collected pressure signal with the first pressure threshold, and judges whether the flame of the burner is extinguished according to the collected signal of the flame detection device;

c1. When the collected pressure signal is greater than the first pressure threshold and the flame of the burner is extinguished, the control device judges that the burner is unexpectedly extinguished.

According to a possible implementation manner, the step a further includes: setting a second pressure threshold in the control device; the step c further includes the step: c2. When the collected pressure signal is smaller than the first pressure threshold pressure threshold, and the flame of the burner is extinguished, the control device judges that the burner is normally extinguished.

According to a possible implementation manner, the first pressure threshold is 500 Pa.

According to a possible implementation manner, the second pressure threshold is 50 Pa.

According to a possible implementation manner, the step b specifically includes: the control device respectively collects the signal of the flame detection device and the pressure signal of the pressure detection device in real time.

According to a possible implementation manner, the step c1 further includes the following step after the control device judges that the burner is turned off unexpectedly: the control device controls to close the gas valve.

According to a possible implementation manner, the cooker further includes an alarm device, and the step c1 further includes the following step after the control device judges that the burner is unexpectedly turned off: the control device controls the The alarm device sounds an alarm.

Based on the technical purpose of the present invention, the present invention proposes another technical solution as follows: a cooker, comprising: only one burner; a flame detection device, which detects the flame of the burner; a gas valve, which adjusts the gas supply to the burner gas flow; the cooker also includes a pressure detection device, which detects the pressure of the gas supplied to the gas valve; a control device, which obtains a third pressure threshold; the control device collects the signal of the flame detection device and the pressure detecting the pressure signal of the device, and comparing the collected pressure signal with the third pressure threshold, and judging whether the flame of the burner is extinguished according to the collected signal of the flame detection device; If the pressure signal is less than the third pressure threshold and the flame of the burner is extinguished, the control device judges that the burner is unexpectedly extinguished.

Since the pressure detection device is installed upstream of the gas valve, the pressure signal detected by the pressure detection device is different when the gas valve is in the open and closed state. Combined with the signal detected by the flame detection device, the control device can judge whether the burner is Accidental flameout.

According to a possible implementation manner, when the collected pressure signal is greater than or equal to the third pressure threshold and the flame of the burner is extinguished, the control device determines that the burner is normally extinguished.

According to a possible implementation manner, the third pressure threshold is 0.95×a gas pressure value supplied to the cooker. The gas pressure value supplied to the cooker may be understood as the gas pressure value in the gas pipeline connected to the cooker. Since the pressure detection device of the technical solution is arranged upstream of the gas valve, the pressure signal measured by the pressure detection device before the gas valve is opened can be regarded as the gas pressure value of the cooker.

According to a possible implementation manner, the control device obtains the third pressure threshold by preset the gas pressure value supplied to the cooker; or, the pressure collected by the control device at the moment when the cooker is turned on The signal is used as the gas pressure value supplied to the cooker, and then the third pressure threshold is obtained. Usually, when a gas cooker is installed, the gas pressure value of the gas pipeline connected to the cooker is detected. Therefore, the gas pressure value supplied to the cooker can be directly set in the control device. Or, at the moment when the cooker is turned on, the pressure value detected by the pressure detection device is used as the pressure value of the gas supplied to the cooker. It should be explained that, at the moment when the cooker is turned on, the gas valve is not in the open position, and the gas valve has not started to supply gas to the burner at this time. If the gas cooker is opened by the user manually operating the gas valve, and the gas valve is a manual cock valve, the moment the cooktop is opened may be the moment the cock valve is pressed down. And if the cooker is turned on by the user's touch control, the moment the cooker is turned on may be the moment the user touches to unlock it.

According to a possible implementation manner, the cooker is a gas cooker or a gas-electromagnetic hybrid cooker.

Finally, the present invention proposes the following technical solution: a control method for a cooker, wherein the cooker includes only one burner; a flame detection device for detecting the flame of the burner; a gas valve for adjusting the gas supply to the burner The gas flow rate of the device; the pressure detection device detects the gas pressure supplied to the gas valve; the control device; the control method includes the following steps:

A. The control device acquires a third pressure threshold;

B. The control device collects the signal of the flame detection device and the pressure signal of the pressure detection device;

C. The control device compares the collected pressure signal with the third pressure threshold, and judges whether the flame of the burner is extinguished according to the collected signal of the flame detection device;

C1. When the collected pressure signal is less than the third pressure threshold and the flame of the burner is extinguished, the control device judges that the burner is unexpectedly extinguished.

According to a possible implementation manner, the step C further includes the step: C2. When the collected pressure signal is greater than or equal to the third pressure threshold and the flame of the burner is extinguished, the control device judges that The burner is a normal flameout.

According to a possible implementation manner, the third pressure threshold is 0.95×a gas pressure value supplied to the cooker.

According to a possible implementation manner, the step A specifically includes the step of: setting the gas pressure value supplied to the cooker in the control device to obtain the third pressure threshold; or, the control device will The pressure signal collected at the moment when the cooker is turned on is used as the gas pressure value supplied to the cooker, and then the third pressure threshold is obtained.

【Description of drawings】

FIG. 1 is a schematic diagram of a cooker according to a first embodiment of the present invention;

Fig. 2 is a schematic diagram of a cooker according to a second embodiment of the present invention.

Reference signs:

1, 2-cooker; 10-burner; 11-inner ring; 12 outer ring; 20-flame detection device; 30-gas valve; 31-main air pipe; 32-inner ring air supply pipe; 33-outer ring air supply pipe; 34, 35-injection tube; 40-pressure detection device; 50, 60-control device.

【detailed description】

In order to have a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed descriptions are provided in conjunction with the embodiments.

Please refer to FIG. 1 , which is a schematic diagram of a cooktop according to a first embodiment of the present invention. The cooker 1 is a gas cooker, which includes a burner 10 , a flame detection device 20 and a gas valve 30 . The burner 10 has an inner ring 11 and an outer ring 12, which respectively form an inner ring flame and an outer ring flame when the burner 10 burns. The flame detection device 20 is a thermocouple and detects the flame of the burner 10 , specifically the flame of the inner ring 11 of the burner 10 . The gas valve 30 is a plug valve, and the user can manually adjust the gas valve 30 to adjust the flow of gas supplied to the burner 10 .

The cooktop 1 also includes a pressure detection device 40 and a control device 50 . Among them, the pressure detection device 40 detects the pressure of the gas continuously supplied to the burner 10 by the gas valve 30 . The cooker 1 has a main air pipe 31 , an inner ring air supply pipe 32 and an outer ring air supply pipe 33 . The inner ring air supply pipe 32 and the outer ring air supply pipe 33 are located between the gas valve 30 and the burner 10 . The main gas pipe 31 delivers the gas to the gas valve 30 , and the inner ring gas supply pipe 32 supplies the gas regulated by the gas valve 30 to the injection pipe 34 corresponding to the inner ring 11 of the burner, and finally to the inner ring 11 of the burner. The outer ring gas supply pipe 33 supplies the gas regulated by the gas valve 30 to the injection pipe 35 corresponding to the outer ring 12 of the burner, and finally provides it to the outer ring 12 of the burner. Since in this embodiment, since the gas valve 30 starts to supply gas to the burner 10, no matter how the gas valve 30 adjusts the gas flow, the inner ring gas supply pipe 32 continues to supply gas to the inner ring 11 of the burner. Unless the gas valve 30 is closed. Therefore, the pressure detection device 40 of this embodiment is installed at the inner ring gas supply pipe 32 to detect the pressure signal of the gas in the inner ring gas supply pipe 32 , so as to provide meaningful data for the control device 50 to judge whether the burner 10 is turned off unexpectedly.

The control device 50 is preset with a first pressure threshold and a second pressure threshold. In this embodiment, the first pressure threshold is 500 Pa, and the second pressure threshold is 50 Pa. After the burner 10 is ignited, the control device 50 respectively collects the signal of the flame detection device 20 and the pressure signal of the pressure detection device 40 in real time, and uses the collected pressure signal as the first pressure threshold 500pa and the second pressure threshold 50pa respectively. comparison, and judge whether the flame of the burner 10 is extinguished according to the collected signal of the flame detection device 20. Wherein, the pressure signal collected by the control device is a relative pressure value.

The control device 50 can be arranged inside the cooker 1 and cannot be seen by the user; it can also be arranged on the panel of the cooker 1 and be seen by the user. The control device 50 can be respectively connected with the flame detection device 20 and the pressure detection device 40 through cables, so as to respectively collect the signals of the two. The control device 50 can also be wirelessly connected to the flame detection device 20 and the pressure detection device 40 to collect signals of the two, for example, by sending infrared signals, laser signals or wireless signals. Therefore, the flame detection device 20 and the pressure detection device 40 in FIG. 1 are respectively connected with the control device 50 by dotted lines, which is similar in FIG. 2 .

When the pressure signal collected by the control device 50 is greater than the first pressure threshold 500pa, and the flame of the burner 10 is judged to be extinguished by the collected signal of the flame detection device 20, then the control device 50 judges that the burner 10 is accidentally extinguished. In this embodiment, the gas source used by the cooker 1 is natural gas, and the gas pressure supplied to the cooker 1 is about 2500 Pa. When the pressure signal collected by the control device 50 is greater than the first pressure threshold 500pa, it indicates that there is gas flow in the inner ring gas supply pipe 32, the gas valve 30 is open, and the flame of the burner 10 is extinguished, so the control device 50 determines that the burner 10 is Judgment of accidental flameout.

When the collected pressure signal is less than the second pressure threshold 50pa, and the flame of the burner 10 is determined to be extinguished by the collected signal of the flame detection device 20, then the control device 50 judges that the burner 10 is normally extinguished. When the pressure signal collected by the control device 50 is less than the second pressure threshold 50pa, it means that the gas valve 30 is closed at this time, and the inner ring gas supply pipe 32 is connected to the atmosphere because the inlet end of the injection pipe 34 has an opening, and the pressure detection at this time The pressure signal collected by the device 40 is close to the atmospheric pressure, and the flame of the burner 10 is extinguished, so the control device 50 judges that the burner 10 is normally extinguished.

The cooker 1 also includes an alarm device (not shown in the figure), and the control device 50 is also used to control the alarm device to issue an alarm after making a judgment that the burner 10 is accidentally turned off, so as to remind the user.

In another embodiment, the gas valve is not a manual cock valve, but a gas valve controlled by the control device 50 . The control device 50 is also used to control the closing of the gas valve after the burner 10 is judged to be out of flame unexpectedly. Therefore, the electromagnetic valve connected with the flame detection device forms a double-layer protection, which improves the safety of the cooker 1 .

In another embodiment, the cooker 1 further includes a pressure stabilizing valve, which is located upstream of the pressure detection device 40 in the gas flow direction, specifically, the pressure stabilizing valve is arranged on the main air pipe 31 .

In another embodiment, the pressure detecting device 40 is integrated on the gas valve 30 to detect the pressure signal of the gas supplied to the inner ring 11 of the burner 10 .

Here, the present invention also provides an embodiment of a control method for a cooker 1, wherein the cooker 1 includes a burner 10; a flame detection device 20 for detecting the flame of the burner 10; a gas valve 30 for adjusting the gas supplied to the burner 10 The flow rate; the pressure detection device 40 , which detects the pressure of the gas continuously supplied to the burner 10 by the gas valve 30 ; and the control device 50 . The control method includes the following steps:

a. Set the first pressure threshold 500pa and the second pressure threshold 50pa in the control device 50;

b. the control device 50 respectively collects the signal of the flame detection device 20 and the pressure signal of the pressure detection device 40 in real time;

c. The control device 50 compares the collected pressure signal with the first pressure threshold 500 Pa and the second pressure threshold 50 Pa, and judges the flame detection device 20 according to the collected signal. Whether the flame of the burner 10 is extinguished;

c1. When the collected pressure signal is greater than the first pressure threshold and the flame of the burner 10 is extinguished, the control device 50 judges that the burner 10 is unexpectedly flamed out;

c2. When the collected pressure signal is less than the second pressure threshold and the flame of the burner 10 is extinguished, the control device 50 judges that the burner 10 is normally extinguished.

Further, in one embodiment, step c1 further includes the following step after the control device 50 judges that the burner 10 is turned off unexpectedly: the control device 50 controls to close the gas valve.

Further, in an embodiment, wherein the cooker 1 further includes an alarm device, step c1 further includes the following step after the control device 50 judges that the burner 10 is turned off accidentally, the control device 50 controls the alarm device to issue an alarm.

Please refer to FIG. 2 , which is a schematic diagram of a cooker according to a second embodiment of the present invention. The cooker 2 is a gas cooker or a gas-electromagnetic hybrid cooker. The cooker 2 includes only one burner 10 , a flame detection device 20 and a gas valve 30 . The burner 10 has an inner ring 11 and an outer ring 12, which respectively form an inner ring flame and an outer ring flame when the burner 10 burns. The flame detection device 10 is a thermocouple, and detects the flame of the inner ring 11 of the burner 10 . The gas valve 30 is a plug valve, and the user can manually adjust the gas valve 30 to adjust the flow of gas supplied to the burner 10 .

The cooker 2 also includes a pressure detection device 40 and a control device 60 . Different from the first embodiment, the pressure detection device 40 of this embodiment is installed at the main air pipe 31 to detect the pressure of the gas supplied to the gas valve 30 , that is, to detect the pressure signal in the main air pipe 31 .

The control device 60 acquires a third pressure threshold, which in this embodiment is 0.95×the gas pressure value supplied to the cooker 2 . The gas source used by the stove 2 is natural gas, and the gas pressure supplied to the stove 2 is about 2500pa, so the third pressure threshold is 0.95×2500pa, that is, 2375pa. In one embodiment, the control device 60 can obtain the third pressure threshold by preset the gas pressure value 2500pa supplied to the cooker 2 . In another embodiment, the pressure signal collected by the control device 60 at the moment when the cooker 2 is turned on is used as the gas pressure value supplied to the cooker 2, and then the third pressure threshold is obtained.

The control device 60 respectively collects the signal of the flame detection device 20 and the pressure signal of the pressure detection device 40 in real time, compares the collected pressure signal with the third pressure threshold, and judges the burner according to the collected signal of the flame detection device 20 10 whether the flame is extinguished.

When the collected pressure signal is less than the third pressure threshold 2375pa, and the flame of the burner 10 is extinguished, the control device 60 judges that the burner 10 is accidentally extinguished. When the collected pressure signal is less than the third pressure threshold, it means that the gas valve 30 is in the open state, and the flame of the burner 10 is extinguished, so the control device 60 judges that the burner 10 is accidentally extinguished. When the collected pressure signal is greater than or equal to the third pressure threshold and the flame of the burner 10 is extinguished, the control device 60 judges that the burner 10 is normally extinguished. When the collected pressure signal is greater than or equal to the third pressure threshold, it means that the gas valve 30 has been closed, so the control device 60 judges that the burner 10 is normally turned off.

The cooker 2 also includes an alarm device (not shown in the figure), and the control device 60 is also used to control the alarm device to issue an alarm after judging that the burner 10 is accidentally turned off, so as to remind the user.

In another embodiment, the gas valve is a gas valve controlled by the control device 60 . The control device 60 is also used to control and close the gas valve after the burner 10 is judged to be out of flame unexpectedly.

The present invention also provides an embodiment of a control method for a cooker 2, wherein the cooker 2 includes only one burner 10; a flame detection device 20 for detecting the flame of the burner 10; a gas valve 30 for adjusting the flow of gas supplied to the burner 10 ; The detection device 40 detects the gas pressure supplied to the gas valve 30 ; the control device 60 . The control method includes the following steps:

A. The control device 60 obtains the third pressure threshold, that is, 0.95×the gas pressure value supplied to the cooker 2;

B. The control device 60 collects the signal of the flame detection device 20 and the pressure signal of the pressure detection device 40;

C. The control device 60 compares the collected pressure signal with the third pressure threshold, and judges whether the flame of the burner 10 is extinguished according to the collected signal of the flame detection device 20;

C1. When the collected pressure signal is less than the third pressure threshold and the flame of the burner 10 is extinguished, the control device 60 judges that the burner 10 is unexpectedly flamed out;

C2. When the collected pressure signal is greater than or equal to the third pressure threshold and the flame of the burner 10 is extinguished, the control device 60 judges that the burner 10 is normally extinguished.

In one embodiment, the step A specifically includes the step of: setting the gas pressure value supplied to the cooker 2 in the control device 60 to obtain the third pressure threshold.

In another embodiment, the step A specifically includes: the control device 60 uses the pressure signal collected at the moment when the cooker 2 is turned on as the gas pressure value supplied to the cooker 2, and then obtains the third pressure threshold.

Further, in one embodiment, the step C1 further includes the following step after the control device 60 judges that the burner 10 is turned off unexpectedly: the control device 60 controls to close the gas valve.

Further, in one embodiment, wherein the cooker 2 further includes an alarm device, the step C1 further includes the following step after the control device 50 judges that the burner 10 is accidentally turned off: the control device 60 controls the alarm device to send out alarm.

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 (27)

1. a kind of kitchen range (1), including：

Burner (10)；

Flame detecting device (20), detects the flame of the burner (10)；

Gas valve (30), regulation feeds to the gas flow of the burner (10)；

Characterized in that, also including

Pressure-detecting device (40), detects by the pressure of the lasting combustion gas for feeding to the burner (10) of the gas valve (30) Power；

Control device (50), is preset with first pressure threshold value；

The control device (50) gathers the signal and the pressure-detecting device (40) of the flame detecting device (20) respectively Pressure signal, and the pressure signal that will collect and the first pressure threshold value make comparisons, and according to the institute for collecting The signal for stating flame detecting device (20) judges whether the flame of the burner (10) extinguishes；

When the pressure signal for collecting be more than the first pressure threshold value, and the burner (10) fray-out of flame, It is the judgement of accident extinguishing that the control device (50) makes the burner (10).

2. kitchen range (1) as claimed in claim 1, it is characterised in that the control device (50) is also preset with second pressure Threshold value, the pressure signal and the second pressure threshold value that the control device (50) will also collect is made comparisons；

When the pressure signal for collecting be less than the second pressure threshold value, and the burner (10) fray-out of flame, It is normal flame-out judgement that the control device (50) makes the burner (10).

3. kitchen range (1) as claimed in claim 1 or 2, it is characterised in that the pressure signal is relative pressure.

4. kitchen range (1) as claimed in claim 1 or 2, it is characterised in that the first pressure threshold value is 500pa.

5. kitchen range (1) as claimed in claim 2, it is characterised in that the second pressure threshold value is 50pa.

6. kitchen range (1) as claimed in claim 1 or 2, it is characterised in that the control device (50) Real-time Collection respectively The signal of the flame detecting device (20) and the pressure signal of the pressure-detecting device (40).

7. kitchen range (1) as claimed in claim 1 or 2, it is characterised in that including burner described at least one (10), Regulation feed to each burner (10) gas flow at least one described in gas valve (30), positioned at a gas valve (30) With the inner ring air supply pipe (32) and outer shroud air supply pipe (33) between a burner (10), the inner ring air supply pipe (32) Combustion gas, institute are supplied with the outer shroud air supply pipe (33) to the inner ring (11) and outer shroud (12) of the burner (10) respectively State pressure-detecting device (40) and be arranged at inner ring air supply pipe (32) place, to detect in the inner ring air supply pipe (32) The pressure signal of combustion gas；The flame detecting device (20) detects the flame of the inner ring (11) of the burner (10).

8. kitchen range (1) as claimed in claim 1 or 2, it is characterised in that the pressure-detecting device (40) is integrated in institute State on gas valve (30), to detect the pressure signal of the combustion gas of the inner ring (11) for supplying the burner (10)；The fire Flame detection means (20) detects the flame of the inner ring (11) of the burner (10).

9. kitchen range (1) as claimed in claim 1 or 2, it is characterised in that including pressure maintaining valve, the pressure maintaining valve is in combustion gas stream Upwards positioned at the upstream of the pressure-detecting device (40).

10. kitchen range (1) as claimed in claim 1 or 2, it is characterised in that the control device (50) make it is described After burner (10) is for the judgement of accident extinguishing, it is additionally operable to control and closes the gas valve (30).

11. kitchen range (1) as claimed in claim 1 or 2, it is characterised in that including warning device, the control device (50) After the burner (10) is made for the judgement of accident extinguishing, it is additionally operable to control the warning device to send alarm.

12. a kind of control methods of kitchen range (1), wherein the kitchen range (1) include burner (10)；Flame detecting device (20), Detect the flame of the burner (10)；Gas valve (30), regulation feeds to the gas flow of the burner (10)；Pressure Detection means (40), detects by the pressure of the lasting combustion gas for feeding to the burner (10) of the gas valve (30)；Control Device (50)；

Characterized in that, the control method is comprised the following steps：

A. first pressure threshold value is set in the control device (50)；

B. the control device (50) gathers the signal and the pressure-detecting device (40) of the flame detecting device (20) respectively Pressure signal；

C. the pressure signal and the first pressure threshold value that the control device (50) will collect are made comparisons, and according to The signal of the flame detecting device (20) for collecting judges whether the flame of the burner (10) extinguishes；

C1. when the pressure signal for collecting is more than the first pressure threshold value, and the flame of the burner (10) puts out Go out, the control device (50) judges that the burner (10) is accident extinguishing.

13. control methods as claimed in claim 12, it is characterised in that

The step a also includes：The setting second pressure threshold value in the control device (50)；

The step c also includes step：C2. it is when the pressure signal for collecting is less than the second pressure threshold value and described The fray-out of flame of burner (10), then the control device (50) judge the burner (10) for normal flame-out.

14. control method as described in claim 12 or 13, it is characterised in that the first pressure threshold value is 500pa.

15. control methods as claimed in claim 13, it is characterised in that the second pressure threshold value is 50pa.

16. control method as described in claim 12 or 13, it is characterised in that the step b is specially：The control The signal and the pressure of the pressure-detecting device (40) of flame detecting device (20) described in device (50) difference Real-time Collection Signal.

17. control method as described in claim 12 or 13, it is characterised in that the step c1 is in the control device (50) It is further comprising the steps of after the step of judging the burner (10) for accident extinguishing：Control device (50) control is closed Close the gas valve (30).

18. control method as described in claim 12 or 13, it is characterised in that wherein described kitchen range (1) also include alarm Device, the step c1 is also wrapped after the step of control device (50) judges the burner (10) for accident extinguishing Include following steps：The control device (50) controls the warning device to send alarm.

A kind of 19. kitchen range (2), including：

Only one burner (10)；

Flame detecting device (20), detects the flame of the burner (10)；

Gas valve (30), regulation feeds to the gas flow of the burner (10)；

Characterized in that, also including

Pressure-detecting device (40), detection feeds to the pressure of the combustion gas of the gas valve (30)；

Control device (60), obtains the 3rd pressure threshold；

The control device (60) gathers the signal and the pressure-detecting device (40) of the flame detecting device (20) Pressure signal, and the pressure signal that will collect and the 3rd pressure threshold make comparisons, and according to collecting The signal of flame detecting device (20) judges whether the flame of the burner (10) extinguishes；

When the pressure signal for collecting be less than the 3rd pressure threshold, and the burner (10) fray-out of flame, It is the judgement of accident extinguishing that then the control device (60) makes the burner (10).

20. kitchen range (2) as claimed in claim 19, it is characterised in that when the pressure signal for collecting is more than or equal to 3rd pressure threshold, and the burner (10) fray-out of flame, the control device (60) makes the burning Device (10) is normal flame-out judgement.

21. kitchen range (2) as described in claim 19 or 20, it is characterised in that the 3rd pressure threshold is 0.95 × confession To the gas pressure force value of the kitchen range (2).

22. kitchen range (2) as claimed in claim 21, the control device (60) is by the default supply kitchen range (2) Gas pressure force value and obtain the 3rd pressure threshold；Or, the control device (60) is opened in the kitchen range (2) The pressure signal that collects of moment as the gas pressure force value for supplying the kitchen range (2), and then obtain the 3rd pressure threshold.

23. kitchen range (2) as described in claim 19 or 20, it is characterised in that the kitchen range (2) for a kind of gas-cooker or Person's combustion gas electromagnetism mixing stove.

24. a kind of control methods of kitchen range (2), wherein the kitchen range (2) include only one burner (10)；Fire defector Device (20), detects the flame of the burner (10)；Gas valve (30), regulation feeds to the combustion of the burner (10) Throughput；Pressure-detecting device (40), detection feeds to the gaseous-pressure of the gas valve (30)；Control device (60)；

Characterized in that, the control method is comprised the following steps：

A. the control device (60) obtains the 3rd pressure threshold；

B. the control device (60) gathers the signal and the pressure-detecting device (40) of the flame detecting device (20) Pressure signal；

C. the pressure signal and the 3rd pressure threshold that the control device (60) will collect are made comparisons, and according to The signal of the flame detecting device (20) for collecting judges whether the flame of the burner (10) extinguishes；

C1. when the pressure signal for collecting is less than the 3rd pressure threshold, and the flame of the burner (10) puts out Go out, then the control device (60) judges that the burner (10) is accident extinguishing.

The control method of 25. kitchen range (2) as claimed in claim 24, it is characterised in that the step C also includes step： C2. when the pressure signal for collecting be more than or equal to the 3rd pressure threshold, and the burner (10) flame Extinguish, the control device (60) judges the burner (10) for normal flame-out.

The control method of 26. kitchen range (2) as described in claim 24 or 25, it is characterised in that the 3rd pressure threshold It is the gas pressure force value of 0.95 × supply kitchen range (2).

The control method of 27. kitchen range (2) as described in claim 24 or 25, it is characterised in that the step A is specifically wrapped Include step：

Setting supplies the gas pressure force value of the kitchen range (2) and obtains the 3rd pressure threshold in the control device (60)；

Or, the pressure signal that the control device (60) collects the moment being opened in the kitchen range (2) is used as supply The gas pressure force value of the kitchen range (2), and then obtain the 3rd pressure threshold.