CN106765339B - Kitchen range and control method thereof - Google Patents
Kitchen range and control method thereof Download PDFInfo
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- CN106765339B CN106765339B CN201510827348.2A CN201510827348A CN106765339B CN 106765339 B CN106765339 B CN 106765339B CN 201510827348 A CN201510827348 A CN 201510827348A CN 106765339 B CN106765339 B CN 106765339B
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Abstract
The invention relates to a cooker and a control method thereof. The hob (1) comprises: a burner (10); a flame detection device (20) that detects a flame of the burner (10); a gas valve (30) that regulates a gas flow rate supplied to the burner (10); the hob further comprises pressure detection means (40) detecting the pressure of the gas supplied to the burner (10) continuously by the gas valve (30); a control device (50) which is preset with a first pressure threshold value; the control device (50) respectively collects a signal of the flame detection device (20) and a pressure signal of the pressure detection device (40), compares the collected pressure signal with the first pressure threshold value, and judges whether the flame of the combustor (10) is extinguished according to the collected signal of the flame detection device (20). A control device (50) may make a determination of whether the burner (10) is unexpectedly flameout.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of cookers, in particular to a cooker with a burner and a control method thereof.
[ background of the invention ]
The existing gas cooker has no accidental flameout reminding or alarming function, only the thermocouple is connected with the electromagnetic valve, once the flame of the burner is extinguished, the voltage of the thermocouple is reduced, and the electromagnetic valve closes the gas. However, if the electromagnetic valve fails, the risk of gas leakage still exists; on the other hand, although the gas is closed by the electromagnetic valve, the user does not timely obtain the prompt or alarm that the burner is accidentally turned off, so that the user can not find that the food is not cooked well and waste time when the user waits for the thought cooking time to end.
Some current accidental flameout determinations primarily combine two signals: whether the flame is extinguished and whether the gas valve body is in the open position. An accidental flame-out is only determined when the flame is extinguished and the valve body is in the open position. The mechanism is added on the valve body for detecting the opening position of the gas valve body, the schemes are strong in realizability and economy but limited in space, and in a narrow space formed by the valve body, the panel and the bottom shell, the mechanism is sometimes difficult to be added to realize the position detection of the valve body.
[ summary of the invention ]
The present invention aims to address at least one of the above technical problems by providing an improved cooking appliance and a control method thereof.
In order to achieve the technical purpose, the invention firstly provides the following technical scheme: a cooktop, comprising: a burner; a flame detection device that detects a flame of the burner; a gas valve that adjusts a gas flow rate supplied to the burner; the cooker also comprises a pressure detection device for detecting the pressure of the gas continuously supplied to the burner by the gas valve; the control device is preset with a first pressure threshold value; the control device respectively collects a signal of the flame detection device and a pressure signal of the pressure detection device, compares the collected pressure signal with the first pressure threshold value, and judges whether the flame of the combustor is extinguished according to the collected signal of the flame detection device; when the collected pressure signal is larger than the first pressure threshold value and the flame of the burner is extinguished, the control device judges that the burner is accidentally extinguished.
The invention provides a technical scheme with different technical concepts to judge the accidental flameout of a combustor, which is not improved around a gas valve from the aspect of mechanical structure, but utilizes the detection of gas pressure to judge the accidental flameout of the combustor. This makes the implementation of the solution of the invention not restricted by the structure of the gas valve itself and the space inside the hob where the gas valve is located.
The burners that are widely available on the market today have an inner ring and an outer ring, and the gas valve connects two gas supply pipes, i.e. an inner ring gas supply pipe and an outer ring gas supply pipe that supply gas to the inner ring and the outer ring of the burner, respectively. Under normal conditions, when the combustor is ignited, the inner ring air supply pipe can continuously supply gas to the combustor, the flame of the inner ring of the combustor is always kept burning, but the flame of the combustor is adjusted to the minimum process from the maximum, the outer ring air supply pipe can stop supplying gas to the combustor, the flame of the outer ring can be extinguished, only the inner ring air supply pipe supplies gas to the combustor at last, and only the inner ring of the combustor has flame. Therefore, the pressure detecting means should be provided to detect the pressure of the gas of the inner ring gas supply pipe. Therefore, "the pressure detecting means detects the pressure of the gas supplied from the gas valve to the burner", it is understood that the pressure of the gas continuously supplied from the gas valve to the burner throughout the combustion of the burner is detected by the pressure detecting means. For example, in the case of a burner having an inner ring, a middle ring, and an outer ring, the gas supply pipes corresponding to the middle ring and the inner ring are continuously supplied with gas throughout the combustion of the burner, and the pressure detecting device may detect the gas pressure in the gas supply pipes corresponding to the middle ring or the outer ring.
Similarly, "flame detection means for detecting the flame of said burner" is understood to mean a means for detecting the flame of a portion which continues to burn all the time during the combustion of the burner. For the widely existing burners on the market today, the flame detection means is to detect 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 embodiment, the control device also presets a second pressure threshold value, and the control device also compares the acquired pressure signal with the second pressure threshold value; when the collected pressure signal is smaller than the second pressure threshold value and the flame of the combustor is extinguished, the control device judges that the combustor is normally extinguished.
According to a possible embodiment, the pressure signal is a relative pressure value. The pressure signal is a pressure value expressed with reference to atmospheric pressure. Of course, in other embodiments, the pressure signal may also be represented as a voltage signal or a current signal.
According to a possible embodiment, the first pressure threshold is 500 pa. The range of the gas cooker is at least suitable for natural gas, liquefied petroleum gas or artificial gas, and the used gas pressure ranges from about 800pa to 4000 pa. When the acquired pressure signal is greater than the first pressure threshold value of 500pa and the flame of the burner is extinguished, which indicates that the pressure detection device detects that gas flows, gas flows out of the burner and no flame exists in the burner, the control device can judge that the burner is accidentally extinguished.
According to a possible embodiment, the second pressure threshold is 50 pa. When the acquired pressure signal is smaller than the second pressure threshold value 50pa and the flame of the combustor is extinguished, which indicates that the gas valve is in a normally closed state, and the injection pipe is communicated with the atmosphere, at the moment, the pressure detected by the pressure detection device is almost the atmospheric pressure, and then the control device can judge that the combustor is normally extinguished.
According to a possible embodiment, the control device collects in real time the signal of the flame detection device and the pressure signal of the pressure detection device, respectively. Of course, this is just one possible embodiment, and it should be clear to those skilled in the art that it is also possible that the control device collects the signal of the flame detection device in real time, and then collects the pressure signal of the pressure detection device after judging that the flame of the burner is extinguished.
According to one possible embodiment, the stove comprises at least one burner, at least one gas valve for adjusting the gas flow to each burner, an inner ring gas supply pipe and an outer ring gas supply pipe which are arranged between one gas valve and one burner and respectively supply gas to the inner ring and the outer ring of the burner, and the pressure detection device is arranged at the inner ring gas supply pipe to detect the pressure signal of the gas in the inner ring gas supply pipe; the flame detection device detects a flame of an inner ring of the burner.
According to a possible embodiment, the pressure detection means are integrated on the gas valve to detect a pressure signal of the gas supplied to the inner ring of the burner; the flame detection device detects a flame of an inner ring of the burner.
In order to ensure a stable pressure, the pressure signal detected by the pressure detection means is valid, according to one possible embodiment the hob comprises a pressure maintaining valve upstream of the pressure detection means in the gas flow direction. For example, the pressure detection device is disposed at the main air pipe.
According to a possible embodiment, the control means are also adapted to control the closing of the gas valve after a determination is made that the burner is accidentally extinguished. Although the electromagnetic valve of most cookers can close the gas after flame detection device detects that flame goes out, but the control device controls to close the gas valve, and double-layer guarantee improves the safety factor of the cookers.
According to a possible embodiment, the cooking appliance comprises an alarm device, and the control device is further configured to control the alarm device to give an alarm after the determination that the burner is accidentally extinguished is made. Therefore, after the user knows the alarm of accidental flameout, the gas valve can be closed or the ignition can be performed again in time, the safety of the cooker is improved, and the current state of the cooker can be known in time.
The invention also provides a technical scheme as follows: a method of controlling a cooktop, wherein the cooktop includes a burner; a flame detection device that detects a flame of the burner; a gas valve that adjusts a gas flow rate supplied to the burner; a pressure detection device that detects a pressure of the gas supplied to the burner continuously by the gas valve; a control device; the control method comprises the following steps:
a. setting a first pressure threshold in the control device;
b. the control device respectively collects signals of the flame detection device and pressure signals of the pressure detection device;
c. the control device compares the collected pressure signal with the first pressure threshold value, and judges whether the flame of the burner is extinguished according to the collected signal of the flame detection device;
c1. when the acquired pressure signal is larger than the first pressure threshold value and the flame of the burner is extinguished, the control device judges that the burner is accidentally extinguished.
According to one possible embodiment, said step a further comprises: setting a second pressure threshold in the control device; the step c further comprises the steps of: c2. and when the acquired pressure signal is smaller than the second pressure threshold value and the flame of the burner is extinguished, the control device judges that the burner is normally extinguished.
According to a possible embodiment, the first pressure threshold is 500 pa.
According to a possible embodiment, the second pressure threshold is 50 pa.
According to a possible implementation manner, the step b is specifically: and 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 embodiment, said step c1, after the step of judging by the control device that the burner is accidentally extinguished, further comprises the steps of: the control device controls to close the gas valve.
According to a possible embodiment, wherein the hob further comprises an alarm device, the step c1 further comprises the following steps after the step of the control device judging that the burner is accidentally extinguished: the control device controls the alarm device to give an alarm.
Based on the technical purpose of the invention, the invention also provides a technical scheme as follows: a cooktop, comprising: only one burner; a flame detection device that detects a flame of the burner; a gas valve that adjusts a gas flow rate supplied to the burner; the cooker also comprises a pressure detection device for detecting the pressure of the gas supplied to the gas valve; the control device acquires a third pressure threshold value; the control device collects a signal of the flame detection device and a pressure signal of the pressure detection device, compares the collected pressure signal with the third pressure threshold value, and judges whether the flame of the combustor is extinguished according to the collected signal of the flame detection device; when the acquired pressure signal is smaller than the third pressure threshold value and the flame of the burner is extinguished, the control device judges that the burner is accidentally extinguished.
Because pressure measurement sets up in the upper reaches of gas valve, the gas valve is in under opening and the closed condition, and the pressure signal that pressure measurement detected is different, and the signal that combines flame detection device to detect, controlling means can judge whether the combustor is flame-out by accident.
According to a possible embodiment, 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 makes a determination that the burner is normally extinguished.
According to a possible embodiment, said third pressure threshold is 0.95 × the value of the gas pressure supplied to said hob. The gas pressure value supplied to the cooker can be understood as the gas pressure value in a gas pipeline connected to the cooker. Because the pressure measurement of this technical scheme sets up in the upper reaches of gas valve, consequently, can regard as the pressure signal that pressure measurement device surveyed before the gas valve was opened the gas pressure value of cooking utensils.
According to a possible embodiment, the control means obtain the third pressure threshold by presetting the value of the pressure of the gas supplied to the hob; or, the pressure signal acquired by the control device at the moment when the cooker is opened is used as the gas pressure value supplied to the cooker, so as to obtain the third pressure threshold. Generally, when a gas stove is installed, the pressure value of gas in a gas pipeline connected to the stove is detected, so that the pressure value of gas supplied to the stove can be directly set in a control device. Or, at the moment when the cooker is opened, the pressure value detected by the pressure detection device is used as the pressure value of the gas supplied to the cooker. It is to be explained that at the instant the hob is opened, the gas valve is not yet in the open position, at which time the gas valve has not yet started to supply gas to the burner. If the gas stove is opened by manually operating the gas valve by a user, the gas valve is a manual plug valve, and the moment when the gas stove is opened can be the moment when the plug valve is pressed down. And if the cooktop is opened by the user touch control, the moment when the cooktop is opened can be the moment when the user touches the unlocking.
According to a possible embodiment, the hob is a gas range or a gas electromagnetic hybrid range.
Finally, the invention provides a technical scheme as follows: a method of controlling a hob, wherein the hob comprises only one burner; a flame detection device that detects a flame of the burner; a gas valve that adjusts a gas flow rate supplied to the burner; a pressure detection device that detects a gas pressure supplied to the gas valve; a control device; the control method comprises the following steps:
A. the control device acquires a third pressure threshold value;
B. the control device collects signals of the flame detection device and pressure signals of the pressure detection device;
C. the control device compares the collected pressure signal with the third pressure threshold value, and judges whether the flame of the burner is extinguished according to the collected signal of the flame detection device;
C1. when the acquired pressure signal is smaller than the third pressure threshold value and the flame of the burner is extinguished, the control device judges that the burner is accidentally extinguished.
According to one possible embodiment, said step C further comprises the step of: C2. and when the acquired 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 normally extinguished.
According to a possible embodiment, said third pressure threshold is 0.95 × the value of the gas pressure supplied to said hob.
According to a possible implementation, the step a specifically includes the steps of: setting a pressure value of gas supplied to the cooker in the control device to obtain the third pressure threshold value; or the control device takes the pressure signal acquired at the moment when the cooker is opened as the gas pressure value supplied to the cooker, and then obtains the third pressure threshold value.
[ description of the drawings ]
Fig. 1 is a schematic view of a hob according to a first embodiment of the present invention;
fig. 2 is a schematic view of a cooktop of a second embodiment of the invention.
Reference numerals:
1, 2-kitchen range; 10-a burner; 11-inner ring; 12 an outer ring; 20-flame detection means; 30-a gas valve; 31-main trachea; 32-inner ring gas supply pipe; 33-outer ring gas supply pipe; 34, 35-ejector tube; 40-a pressure detection device; 50, 60-control means.
[ detailed description ] embodiments
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
Referring to fig. 1, fig. 1 is a schematic view of a cooker according to a first embodiment of the present invention. The cooktop 1 is a gas range, and 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 form an inner ring flame and an outer ring flame, respectively, when the burner 10 is fired. The flame detection means 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 kind of cock valve, and the user manually adjusts the gas valve 30 to adjust the flow rate of gas supplied to the burner 10.
The hob 1 further comprises a pressure detection device 40 and a control device 50. Among them, the pressure detecting device 40 detects the pressure of the gas continuously supplied to the burner 10 by the gas valve 30. The hob 1 has a main gas pipe 31, an inner ring gas supply pipe 32 and an outer ring gas supply pipe 33. The inner and outer ring air supply pipes 32 and 33 are located between the gas valve 30 and the burner 10. The main gas pipe 31 supplies 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 corresponding injection pipe 34 of 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 adjusted by the gas valve 30 to the corresponding ejector pipe 35 of the outer ring 12 of the burner, and finally supplies the gas to the outer ring 12 of the burner. Since, in the present embodiment, the gas is supplied from the gas valve 30 to the burner 10, the inner ring gas supply pipe 32 continues to supply the gas to the inner ring 11 of the burner unless the gas valve 30 is closed, regardless of the gas flow rate adjustment performed by the gas valve 30. Therefore, the pressure detecting device 40 of the present embodiment is disposed at the inner ring air supply pipe 32 to detect the pressure signal of the gas in the inner ring air supply pipe 32, so as to provide meaningful data for the control device 50 to determine whether the burner 10 is accidentally extinguished.
The control device 50 is preset with a first pressure threshold value of 500pa and a second pressure threshold value of 50pa in the present embodiment. 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, compares the collected pressure signals with the first pressure threshold 500pa and the second pressure threshold 50pa, and judges whether the flame of the burner 10 is extinguished according to the collected signal of the flame detection device 20. Wherein, the pressure signal that controlling means gathered is relative pressure value.
The control device 50 may be arranged inside the hob 1, not visible to the user; it can also be arranged on the panel of the hob 1, to be visible to the user. The control device 50 may be connected to the flame detection device 20 and the pressure detection device 40 via cables, respectively, to collect signals of the two. The control device 50 may 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 of fig. 1 are connected to the control device 50 by broken lines, similarly to fig. 2.
When the pressure signal collected by the control device 50 is greater than the first pressure threshold value 500pa and the flame of the burner 10 is extinguished according to the collected signal of the flame detection device 20, the control device 50 determines that the burner 10 is unexpectedly 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 flowing 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 makes a determination that the burner 10 is unexpectedly extinguished.
When the collected pressure signal is smaller than the second pressure threshold value 50pa 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 makes a judgment that the burner 10 is normally extinguished. When the pressure signal collected by the control device 50 is smaller than the second pressure threshold 50pa, which indicates that the gas valve 30 is closed, since the inlet end of the ejector pipe 34 has an opening so that the inner ring gas supply pipe 32 is communicated with the atmosphere, and the pressure signal collected by the pressure detection device 40 is close to the atmospheric pressure, and the flame of the burner 10 is extinguished, the control device 50 determines that the burner 10 is normally extinguished.
The cooking appliance 1 further comprises an alarm device (not shown), and the control device 50 is further configured to control the alarm device to give an alarm to prompt a user after the determination that the burner 10 is unexpectedly extinguished is made.
In another embodiment, the gas valve is not a manual plug valve, but is 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 a determination is made that the burner 10 is unexpectedly extinguished. Thereby the solenoid valve of being connected with flame detection device forms double-deck guarantee, improves the security of cooking utensils 1.
In another embodiment, the cooking appliance 1 further comprises a pressure maintaining valve located upstream of the pressure detecting device 40 in the gas flow direction, and specifically, the pressure maintaining valve is disposed on the main gas pipe 31.
In another embodiment, a pressure detection device 40 is integrated with the gas valve 30 to detect a pressure signal of the gas supplied to the inner ring 11 of the burner 10.
Here, the invention also provides an embodiment of a control method of a hob 1, wherein the hob 1 comprises a burner 10; a flame detection device 20 for detecting the flame of the burner 10; a gas valve 30 that adjusts a gas flow rate supplied to the burner 10; a pressure detection device 40 that detects the pressure of the gas continuously supplied from the gas valve 30 to the burner 10; and a control device 50. The control method comprises the following steps:
a. setting a first pressure threshold 500pa and a 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 signals with the first pressure threshold 500pa and the second pressure threshold 50pa respectively, and judges whether the flame of the burner 10 is extinguished according to the collected signals of the flame detection device 20;
c1. when the acquired pressure signal is greater than the first pressure threshold and the flame of the burner 10 is extinguished, the control device 50 determines that the burner 10 is unexpectedly extinguished;
c2. when the collected pressure signal is smaller than the second pressure threshold and the flame of the burner 10 is extinguished, the control device 50 determines that the burner 10 is normally extinguished.
Further, in one embodiment, the step c1 further includes, after the step of the control device 50 determining that the burner 10 is unexpectedly turned off: the control device 50 controls to close the gas valve.
Further, in an embodiment, wherein the cooking appliance 1 further comprises an alarm device, the step c1 further comprises the following steps after the control device 50 judges that the burner 10 is accidentally extinguished: the control device 50 controls the alarm device to give an alarm.
Referring to fig. 2, fig. 2 is a schematic view of a cooking range according to a second embodiment of the present invention. The stove 2 is a gas stove or a gas electromagnetic mixing stove. The hob 2 comprises 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 form an inner ring flame and an outer ring flame, respectively, when the burner 10 is fired. The flame detection device 10 is a thermocouple and detects a flame of the inner ring 11 of the burner 10. The gas valve 30 is a kind of cock valve, and the user manually adjusts the gas valve 30 to adjust the flow rate of gas supplied to the burner 10.
The hob 2 further comprises a pressure detection device 40 and a control device 60. Unlike the first embodiment, the pressure detection device 40 of the present embodiment is provided at the main gas pipe 31, and detects the pressure of the gas supplied to the gas valve 30, that is, detects a pressure signal in the main gas pipe 31.
The control device 60 obtains a third pressure threshold value, which in this embodiment is 0.95 × the pressure value of the gas supplied to the cooking range 2. The gas source used by the cooking appliance 2 is natural gas, and the pressure value of the gas supplied to the cooking appliance 2 is about 2500pa, so the third pressure threshold value is 0.95 × 2500pa, namely 2375 pa. In one embodiment, the control device 60 may obtain the third pressure threshold by presetting a gas pressure value 2500pa supplied to the cooker 2. In another embodiment, the pressure signal acquired by the control device 60 at the moment when the hob 2 is opened is taken as the value of the gas pressure supplied to the hob 2, thus obtaining the third pressure threshold.
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 a 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.
When the collected pressure signal is smaller than the third pressure threshold 2375pa and the flame of the burner 10 is extinguished, the control device 60 makes a judgment that the burner 10 is unexpectedly extinguished. When the collected pressure signal is smaller than the third pressure threshold, it indicates that the gas valve 30 is in the open state and the flame of the burner 10 is extinguished, so the control device 60 makes a judgment that the burner 10 is unexpectedly 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 makes a judgment that the burner 10 is normally extinguished. When the collected pressure signal is greater than or equal to the third pressure threshold, it indicates that the gas valve 30 is closed, so the control device 60 makes a judgment that the burner 10 is normally extinguished.
The cooking appliance 2 further comprises an alarm device (not shown), and the control device 60 is further configured to control the alarm device to give an alarm to prompt a user after the determination that the burner 10 is unexpectedly extinguished is made.
In another embodiment, the gas valve is one controlled by the control device 60. The control device 60 is also used to control the closing of the gas valve after a determination is made that the burner 10 is unexpectedly extinguished.
The present invention also provides an embodiment of a control method of a hob 2, wherein the hob 2 comprises only one burner 10; a flame detection device 20 for detecting the flame of the burner 10; a gas valve 30 that adjusts a gas flow rate supplied to the burner 10; a detection device 40 that detects a gas pressure supplied to the gas valve 30; and a control device 60. The control method comprises the following steps:
A. the control device 60 obtains a third pressure threshold value, namely 0.95 x the pressure value of the gas 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 value, 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 acquired pressure signal is smaller than the third pressure threshold and the flame of the burner 10 is extinguished, the control device 60 determines that the burner 10 is unexpectedly extinguished;
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 determines that the burner 10 is normally extinguished.
In one embodiment, the step a specifically includes the steps of: the control device 60 sets the pressure value of the gas supplied to the cooktop 2 to obtain the third pressure threshold value.
In another embodiment, the step a specifically includes: the control device 60 uses the pressure signal collected at the moment when the hob 2 is opened as the value of the gas pressure supplied to the hob 2, and thus obtains the third pressure threshold.
Further, in an embodiment, the step C1 further includes, after the step of the control device 60 determining that the burner 10 is unexpectedly turned off: the control device 60 controls to close the gas valve.
Further, in an embodiment, wherein the cooking range 2 further comprises an alarm device, the step C1 further comprises the following steps after the control device 50 determines that the burner 10 is accidentally extinguished: the control device 60 controls the alarm device to give an alarm.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.
Claims (27)
1. Hob (1) comprising:
a burner (10);
a flame detection device (20) that detects a flame of the burner (10);
a gas valve (30) that regulates a gas flow rate supplied to the burner (10);
it is characterized by also comprising
A pressure detection device (40) for detecting the pressure of the gas in at least the inner ring gas supply pipe;
a control device (50) which is preset with a first pressure threshold value;
the control device (50) respectively collects a signal of the flame detection device (20) and a pressure signal of the pressure detection device (40), compares the collected pressure signal with the first pressure threshold value, and judges whether the flame of the combustor (10) is extinguished according to the collected signal of the flame detection device (20);
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) makes a determination that the burner (10) is unexpectedly extinguished.
2. Hob (1) according to claim 1, characterized in that said control means (50) also presets a second pressure threshold value, said control means (50) also comparing said pressure signal acquired with said second pressure threshold value;
when the collected pressure signal is smaller than the second pressure threshold value and the flame of the burner (10) is extinguished, the control device (50) judges that the burner (10) is normally extinguished.
3. Hob (1) according to claim 1 or 2, characterized in that said pressure signal is a relative pressure value.
4. Hob (1) according to claim 1 or 2, characterized in that said first pressure threshold is 500 pa.
5. Hob (1) according to claim 2, characterized in that said second pressure threshold is 50 pa.
6. Hob (1) according to claim 1 or 2, characterized in that said control means (50) acquire in real time the signal of said flame detection means (20) and the pressure signal of said pressure detection means (40), respectively.
7. Hob (1) according to claim 1 or 2, comprising at least one of said burners (10), at least one of said gas valves (30) regulating the gas flow to each of said burners (10), an inner ring gas supply pipe (32) and an outer ring gas supply pipe (33) between one of said gas valves (30) and one of said burners (10), said inner ring gas supply pipe (32) and said outer ring gas supply pipe (33) supplying gas to the inner ring (11) and the outer ring (12) of said burner (10), respectively, said pressure detection means (40) being arranged at said inner ring gas supply pipe (32) for detecting a pressure signal of the gas in said inner ring gas supply pipe (32); the flame detection device (20) detects a flame of an inner ring (11) of the burner (10).
8. Hob (1) according to claim 1 or 2, characterized in that said pressure detection means (40) are integrated on said gas valve (30) to detect a pressure signal of the gas supplied to the inner ring (11) of said burner (10); the flame detection device (20) detects a flame of an inner ring (11) of the burner (10).
9. Hob (1) according to claim 1 or 2, characterized in that it comprises a pressure maintaining valve located upstream of the pressure detection means (40) in the gas flow direction.
10. Hob (1) according to claim 1 or 2, characterized in that said control means (50) are also adapted to control the closing of said gas valve (30) after a determination is made that said burner (10) is accidentally extinguished.
11. Hob (1) according to claim 1 or 2, characterized in that it comprises alarm means, said control means (50) being further adapted to control said alarm means to give an alarm after a determination is made that said burner (10) is accidentally extinguished.
12. A control method of a hob (1), wherein the hob (1) comprises a burner (10); a flame detection device (20) that detects a flame of the burner (10); a gas valve (30) that regulates a gas flow rate supplied to the burner (10); a pressure detection device (40) for detecting the pressure of the gas in at least the inner ring gas supply pipe; a control device (50);
the control method is characterized by comprising the following steps:
a. setting a first pressure threshold in the control device (50);
b. the control device (50) respectively collects a signal of the flame detection device (20) and a pressure signal of the pressure detection device (40);
c. the control device (50) compares the collected pressure signal with the first pressure threshold value, 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 acquired pressure signal is larger than the first pressure threshold value and the flame of the burner (10) is extinguished, the control device (50) judges that the burner (10) is accidentally extinguished.
13. The control method according to claim 12,
the step a further comprises: setting a second pressure threshold in the control device (50);
the step c further comprises the steps of: c2. when the acquired pressure signal is smaller than the second pressure threshold value and the flame of the combustor (10) is extinguished, the control device (50) judges that the combustor (10) is normally extinguished.
14. A control method according to claim 12 or 13, characterised in that the first pressure threshold is 500 pa.
15. The control method of claim 13, wherein the second pressure threshold is 50 pa.
16. The control method according to claim 12 or 13, wherein the step b is specifically: the control device (50) respectively collects signals of the flame detection device (20) and pressure signals of the pressure detection device (40) in real time.
17. The control method according to claim 12 or 13, characterized in that said step c1, after the step of said control device (50) judging that said burner (10) is accidentally extinguished, further comprises the steps of: the control device (50) controls to close the gas valve (30).
18. The control method according to claim 12 or 13, wherein the hob (1) further comprises an alarm device, said step c1 further comprises the following step after the step of the control device (50) judging that the burner (10) is accidentally turned off: the control device (50) controls the alarm device to give an alarm.
19. Hob (2) comprising:
only one burner (10);
a flame detection device (20) that detects a flame of the burner (10);
a gas valve (30) that regulates a gas flow rate supplied to the burner (10);
it is characterized by also comprising
A pressure detection device (40) that detects the pressure of gas supplied to the gas valve (30);
a control device (60) for acquiring a third pressure threshold;
the control device (60) collects a signal of the flame detection device (20) and a pressure signal of the pressure detection device (40), compares the collected pressure signal with the third pressure threshold value, and judges whether the flame of the burner (10) is extinguished according to the collected signal of the flame detection device (20);
when the acquired pressure signal is less than the third pressure threshold and the flame of the burner (10) is extinguished, the control device (60) makes a judgment that the burner (10) is accidentally extinguished.
20. Hob (2) according to claim 19, characterized in that when said pressure signal collected is greater than or equal to said third pressure threshold and the flame of said burner (10) is extinguished, said control means (60) make a judgment that said burner (10) is normally extinguished.
21. Hob (2) according to claim 19 or 20, characterized in that said third pressure threshold is 0.95 x the value of the gas pressure fed to said hob (2).
22. Hob (2) according to claim 21, said control means (60) obtaining said third pressure threshold value by presetting a value of a gas pressure supplied to said hob (2); or, the pressure signal collected by the control device (60) at the moment when the cooking range (2) is opened is used as the gas pressure value supplied to the cooking range (2), and then the third pressure threshold value is obtained.
23. Hob (2) according to claim 19 or 20, characterized in, that said hob (2) is a gas range or a gas electromagnetic hybrid range.
24. A control method of a hob (2), wherein the hob (2) comprises only one burner (10); a flame detection device (20) that detects a flame of the burner (10); a gas valve (30) that regulates a gas flow rate supplied to the burner (10); a pressure detection device (40) that detects a gas pressure supplied to the gas valve (30); a control device (60);
the control method is characterized by comprising the following steps:
A. -said control means (60) obtaining a third pressure threshold;
B. the control device (60) collects signals of the flame detection device (20) and pressure signals of the pressure detection device (40);
C. the control device (60) compares the collected pressure signal with the third pressure threshold value, 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 acquired pressure signal is smaller than the third pressure threshold value and the flame of the burner (10) is extinguished, the control device (60) judges that the burner (10) is accidentally extinguished.
25. The control method of a hob (2) according to claim 24, characterized in that said step C further comprises the step of: C2. when the acquired pressure signal is greater than or equal to the third pressure threshold value and the flame of the burner (10) is extinguished, the control device (60) judges that the burner (10) is normally extinguished.
26. Control method of a hob (2) according to claim 24 or 25, characterised in that the third pressure threshold is 0.95 x the gas pressure value supplied to the hob (2).
27. The control method of a hob (2) according to claim 24 or 25, characterized in that said step a specifically comprises the steps of:
-setting in said control means (60) the value of the pressure of the gas supplied to said hob (2) and obtaining said third pressure threshold;
or, the control device (60) takes the pressure signal collected at the moment when the cooking range (2) is opened as the value of the gas pressure supplied to the cooking range (2), and then obtains the third pressure threshold.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107388298B (en) * | 2017-09-13 | 2023-09-01 | 广东万家乐燃气具有限公司 | Gas stove and double flameout control method |
| CN107869741A (en) * | 2017-12-08 | 2018-04-03 | 李尚福 | Cooking stove intelligence control system |
| CN107883411A (en) * | 2017-12-08 | 2018-04-06 | 李尚福 | Business kitchen Intelligent management terminal |
| CN111971508A (en) * | 2018-04-20 | 2020-11-20 | 伊莱克斯家用电器股份公司 | Method for detecting anomalies associated with a gas appliance |
| CN110966630B (en) * | 2018-09-30 | 2021-10-29 | 宁波方太厨具有限公司 | Control method of cooker electromagnetic valve |
| CN113310086B (en) * | 2021-05-31 | 2023-03-24 | 宁波方太厨具有限公司 | Smoke and stove coordinated control device, kitchen range and range hood |
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